長期施肥條件下土壤微量元素化學特性及有效性研究
發(fā)布時間：2018-07-13 20:45
【摘要】：土壤中微量元素的有效性研究已成為農業(yè)和環(huán)境科學領域關注的焦點。施肥是微量元素進入土壤的一個重要途徑,明確和揭示施肥與土壤微量元素有效性之間的關系可為農業(yè)生產實踐提供科學參考依據(jù)。本文研究了長期施肥條件下土壤微量元素含量、形態(tài)、分布特征及其變化情況,分析了影響土壤微量元素有效性的因素,探討了土壤微量元素有效性變化產生的機制,所取得的主要結論如下:(1)長期種植作物和施肥均降低了土壤pH值和碳酸鈣含量,增加了土壤有機質含量。2015年苜蓿連作耕層土壤pH值降低最多,較裸地相比降低了0.44個pH單位。糧豆輪作系統(tǒng)中耕層土壤碳酸鈣含量較2002年相比降低了48%。苜蓿連作耕層土壤有機質積累顯著,與裸地相比增加了134.9%。施肥增加了土壤有效磷含量,糧豆輪作系統(tǒng)中氮磷有機肥配施0-15cm和15-30cm土壤有效磷含量和不施肥相比分別提高了34.3倍和11.69倍。連續(xù)施肥條件下土壤胡敏酸與富里酸比值均大于1。施用有機肥增加了土壤還原性物質總量,其中糧豆輪作系統(tǒng)中氮磷有機肥配施耕層土壤增加較多,較不施肥相比增加了107.14%。(2)作物種植和施肥均增加了土壤有效銅、鐵含量。施肥可提高土壤有效錳含量。苜蓿、小麥連作以及施用有機肥可顯著提高土壤有效鋅含量。與2002年相比,2015年耕層土壤有效銅、錳含量增加量最大的分別是小麥連作系統(tǒng)中單施有機肥0.69 mg kg-1、糧豆輪作系統(tǒng)中氮磷有機肥配施58.91%。苜蓿連作耕層土壤有效鋅、鐵含量較2002年相比分別增加了1.95倍和2.05倍。(3)土壤中微量元素的主要存在形態(tài)是礦物態(tài),錳的氧化物結合態(tài)所占比例也較大。2015年和2002年相比,銅、鋅、鐵的形態(tài)分布變化不大,而錳的形態(tài)分布變化較大,表現(xiàn)為礦物態(tài)和交換態(tài)錳的占比有所提高,碳酸鹽結合態(tài)、氧化物結合態(tài)、有機結合態(tài)錳的占比有所降低。(4)長期種植作物和施肥對土壤鋅、銅的活化作用很小,但交換態(tài)錳和鐵的含量都有所增加。2015年苜蓿連作耕層土壤交換態(tài)錳增加最顯著,較裸地相比增加了8.03倍。糧豆輪作系統(tǒng)中氮磷有機肥配施耕層土壤交換態(tài)鐵增加較多,較不施肥相比增加了84.36%。各形態(tài)銅、鋅含量隨作物種植和施肥年限的增加而增加,但礦物態(tài)銅僅在施用化肥時有所增加。小麥連作系統(tǒng)中單施有機肥耕層土壤碳酸鹽結合態(tài)、氧化物結合態(tài)、有機結合態(tài)銅增加較多,較2002年相比分別增加了2.01mgkg-1、1.7mgkg-1、3.54mgkg-1。苜蓿連作耕層土壤氧化物結合態(tài)鋅增加較多,較2002年相比增加了94.26%。作物種植僅降低了碳酸鹽結合態(tài)錳含量。苜蓿連作0-15cm和15-30cm土壤碳酸鹽結合態(tài)錳含量降低較多,較2002年相比分別降低了59.95mgkg-1和35.65mgkg-1。小麥連作系統(tǒng)中15-30cm土壤有機結合態(tài)錳增加顯著,較裸地相比增加了2.63倍。小麥連作系統(tǒng)土壤各形態(tài)鐵都有所增加。不施肥情況下,小麥連作系統(tǒng)中0-15cm和15-30cm土壤碳酸鹽結合態(tài)鐵較2002年相比分別增加了114.52%和183.69%、有機結合態(tài)鐵分別增加了1.08倍和3.3倍。施肥大都降低了土壤各形態(tài)錳和鐵的含量。糧豆輪作系統(tǒng)中單施磷肥耕層土壤有機結合態(tài)錳增加顯著,較不施肥相比增加了8.2倍。(5)長期作物種植和施肥條件下土壤ph值與有效銅、錳、鋅、鐵之間顯著負相關,有效磷、胡敏酸、富里酸與之相反;土壤有機質、還原性物質總量與有效銅顯著負相關,與有效錳、鋅、鐵則相反;土壤水分與有效銅、鋅呈正相關,而與有效錳、鐵呈負相關。與dtpa-cu、mn、zn、fe含量之間直接通徑系數(shù)最高的分別為土壤水分0.781、胡敏酸0.652、有機質0.895、有機質0.83。與dtpa-cu、mn、fe含量之間直接負作用較高的分別為還原性物質總量-0.509、富里酸-0.595、碳酸鈣-0.501。(6)長期作物種植和施肥條件下交換態(tài)銅、錳、鐵與有效量間呈正相關,且對有效量的直接通徑系數(shù)也最高,分別為0.829、0.445和0.122,故交換態(tài)是土壤有效量的直接和主要來源。碳酸鹽結合態(tài)銅與有效銅呈正相關,且與交換態(tài)銅間接通徑系數(shù)最大0.479,表明它可以通過向交換態(tài)銅的轉化而增加土壤中有效銅的含量。礦物態(tài)銅與有效銅直接通徑系數(shù)較高0.571,可視礦物態(tài)銅為土壤有效銅來源的儲備庫。碳酸鹽結合態(tài)、有機結合態(tài)與有效錳、鋅、鐵的相關系數(shù)、直接通徑系數(shù)均為正值,表明這兩種形態(tài)是土壤有效量的來源。氧化物結合態(tài)鋅與有效鋅顯著正相關,也是土壤鋅的有效來源。(7)長期施用微肥增加了土壤有機質、還原性物質總量。2015年施用銅肥表層土壤有機質和還原性物質總量增加最多,較對照相比分別增加了25%和24.74%。施用微肥后土壤碳酸鈣、有效磷、胡敏酸、富里酸含量大都有所降低。施用銅肥0-15cm、15-30cm土壤碳酸鈣含量降低最顯著,較對照相比分別降低了32.35%、41.25%。施用鋅肥表層土壤有效磷含量降低最多,降低了55%。施用微肥后胡敏酸和富里酸比值均小于1。施用錳肥表層土壤胡敏酸含量降低最多,降幅為77.87%。施用鋅肥亞表層土壤富里酸含量增幅最大,增加了2.27倍。長期施用微肥后,土壤銅、鋅的全量及有效量增加顯著,表層積聚現(xiàn)象明顯。2015年表層土壤全銅、全鋅含量較對照相比分別增加了131.82%和108.71%;有效銅、鋅含量較對照相比分別增加了6.03倍和6.97倍。全錳、有效錳含量并沒有明顯增加。2015年和2001年相比,全錳含量增加幅度小于12%;2015年30-45cm土層有效錳含量和對照相比增幅最大26.54%,其它土層增幅均小于6%。施用微肥后土壤交換態(tài)銅、鋅占全量的比例增加顯著,不同形態(tài)錳占全量的比例變化不明顯。土壤各形態(tài)銅、錳、鋅含量隨施肥年限增加而增加,尤其是表層土壤,礦物態(tài)錳則相反。表層土壤氧化物結合態(tài)、碳酸鹽結合態(tài)銅增幅較大,較對照相比分別增加了23.46倍和16.35倍。各土壤性質與有效銅、錳、鋅間相關性不顯著,但對微量元素形態(tài)有所影響:胡敏酸與除交換態(tài)銅之外的其它形態(tài)銅以及有機結合態(tài)錳都顯著負相關;富里酸與氧化物結合態(tài)鋅顯著正相關。有效銅與碳酸鹽結合態(tài)、氧化物結合態(tài)、有機結合態(tài)銅顯著正相關;交換態(tài)銅載荷在第二主成分里最大,這四種形態(tài)是土壤有效銅的來源。有效錳與交換態(tài)錳顯著正相關;第一主成分里氧化物結合態(tài)、有機結合態(tài)錳的載荷較大,這三種形態(tài)與土壤有效錳關系密切。有效鋅與交換態(tài)、氧化物結合態(tài)、有機結合態(tài)鋅顯著正相關,對有效鋅貢獻較大。(8)施用微肥與土壤微量元素有效量之間存在以下相互作用關系:鋅抑制銅,但銅不抑制鋅;錳利于銅,而銅抑制錳;鋅抑制錳,但錳不抑制鋅;錳肥有利于土壤中有效鐵含量的增加。
[Abstract]:The study of the effectiveness of trace elements in soil has become the focus of attention in the field of agriculture and environmental science. Fertilization is an important way for trace elements to enter the soil. The relationship between fertilization and the availability of soil microelements can provide scientific reference for agricultural production practice. This paper studies the long-term fertilization conditions. The contents, morphology, distribution characteristics and changes of soil trace elements were analyzed, the factors affecting the availability of soil trace elements were analyzed, and the mechanism of the change of soil trace elements was discussed. The main conclusions were as follows: (1) long term crop and fertilization reduced soil pH value and calcium carbonate content, and increased soil organic content. The soil pH value of Alfalfa continuous cropland soil in.2015 year was most lower than that in bare land, which decreased by 0.44 pH units compared with bare land. Compared with 2002, the content of calcium carbonate in plough soil of grain and bean rotation system was lower than that in 2002. The accumulation of organic matter in the soil of Alfalfa continuous cropland soil was significantly increased by 134.9% compared with that of bare land. In the system, the content of N and P organic fertilizer combined with 0-15cm and 15-30cm increased by 34.3 times and 11.69 times compared with that of no fertilizer. The ratio of soil Hu Min acid to fulvic acid under continuous fertilization was greater than 1., and the total amount of soil reductive substances was increased by organic manure, and the nitrogen and phosphorus organic fertilizer in the crop crop rotation system applied to the soil of the plough layer. Increasing 107.14%. (2) crop planting and fertilization increased soil effective copper and iron content. Fertilization could increase soil effective manganese content. Alfalfa, wheat continuous cropping and application of organic manure could significantly increase the content of available zinc in soil. Compared with 2002, the maximum amount of effective copper and manganese content in the plough soil was increased in 2015. The single application of organic fertilizer 0.69 mg kg-1 in wheat continuous cropping system, nitrogen and phosphorus organic fertilizer in grain and bean rotation system with 58.91%. alfalfa continuous cropland soil available zinc, 1.95 times and 2.05 times more iron than in 2002. (3) the main existence form of trace elements in the soil is mineral state, manganese oxide binding state is also more than the proportion of manganese. Compared to 2002 and 2002, the distribution of copper, zinc and iron changed little, but the distribution of manganese was greatly changed, which showed that the proportion of mineral state and exchangeable manganese increased, and the ratio of the carbonate bound state, oxide bound state and organic manganese was reduced. (4) long-term planting and fertilization on soil zinc and copper activation were very important. In.2015 years, the exchange state manganese and iron content in the exchange state increased most significantly, and increased by 8.03 times compared with the bare land. The nitrogen and phosphorus organic fertilizer in the grain bean rotation system increased the exchangeable iron in the soil of the plough layer more, and increased the 84.36%. form of copper, compared with the non fertilizer application, and the zinc content was planted and applied with the crop. The mineral state copper increased only when the fertilizer was applied, but the combination state of the soil carbonate, the oxide bound state, the organic bound copper increased more in the continuous cropping system of the wheat continuous cropping system, and increased the oxide binding state of the 2.01mgkg-1,1.7mgkg-1,3.54mgkg-1. alfalfa continuous cropland soil, respectively, compared with the 2002. The increase of zinc is more, compared with the increase of the 94.26%. crop in 2002, it only reduces the manganese content in the carbonate bound state. The combined manganese content in the alfalfa continuous cropping 0-15cm and the 15-30cm soils decreases more. Compared with the 2002, the organic bound manganese in the 15-30cm soil in the continuous cropping system of 59.95mgkg-1 and 35.65mgkg-1. is significantly increased. Under the condition of no fertilization, the combination of 0-15cm and 15-30cm soil carbonate in the wheat continuous cropping system increased by 114.52% and 183.69% compared with that of 2002, and the organic bound iron increased by 1.08 and 3.3 times respectively. Manganese and iron content. In the grain and bean rotation system, the organic combined manganese in the soil of single phosphate fertilizer layer increased significantly, 8.2 times higher than that of no fertilizer. (5) the soil pH value was negatively correlated with the effective copper, manganese, zinc and iron under the long-term crop planting and fertilization, and the effective phosphorus, the humic acid and the fulvic acid were the opposite; the soil organic matter and the reductive substance were in the opposite direction. The total amount is negatively correlated with the effective copper, which is opposite to the effective manganese, zinc and iron; the soil moisture is positively correlated with the effective copper and zinc, but is negatively correlated with the effective manganese and iron. The highest direct path coefficient between the dtpa-cu, Mn, Zn and Fe is 0.781, the humic acid 0.652, the organic matter 0.895, the organic matter 0.83. and dtpa-cu, Mn, Fe content. The higher negative effects are the total amount of reductive material -0.509, fulvic acid -0.595, calcium carbonate -0.501. (6) in the long-term crop planting and fertilization conditions, the exchange state copper, manganese and iron are positively correlated with the effective quantity, and the direct path coefficient of the effective quantity is also the highest, respectively 0.829,0.445 and 0.122. The exchange state is the direct and main soil effective quantity. There is a positive correlation between the carbonate bound copper and the effective copper, and the maximum path coefficient of the exchange state copper is 0.479, indicating that it can increase the content of the effective copper in the soil through the transformation of the exchangeable copper. The direct path coefficient of the mineral copper and the effective copper is higher than that of the copper, and the visible copper is the Reserve Bank of the effective copper source of the soil. The correlation coefficient of the combined state of acid, the organic binding state and the effective manganese, zinc and iron, the direct path coefficient are positive, indicating that these two forms are the source of the soil effective quantity. The oxide bound zinc is significantly positively correlated with the effective zinc, and is also an effective source of soil zinc. (7) the long-term application of micro fertilizer increases the soil organic matter and the total amount of reductive substances.2015 The total amount of organic matter and reductive substance in the surface soil of copper fertilizer was increased by 25% and the soil calcium carbonate was increased by 25% and the application of micro fertilizer to the photographic ratio. The content of effective phosphorus, Hu Min acid and fulvic acid were mostly reduced. The content of calcium carbonate in 15-30cm soil was most significantly reduced by 0-15cm, and 32.35 decreased compared with the photographic ratio. %, 41.25%. application of Zinc Fertilizer on the surface soil effective phosphorus content decreased most, decreased the ratio of Hu Min acid and fulvic acid after 55%. application of micro fertilizer was less than 1. application manganese fertilizer surface soil Hu Min acid content decreased most, the decrease of 77.87%. application zinc fertilizer subsurface soil rich acid content increase the maximum, 2.27 times. After long-term application of micro fertilizer, soil copper, The total and effective amount of zinc increased significantly. The surface accumulation was obviously all copper in the surface soil of.2015. The total zinc content increased by 131.82% and 108.71%, respectively. The content of effective copper and zinc increased by 6.03 times and 6.97 times compared with the photographic ratio. Total manganese content and effective manganese content did not significantly increase compared with.2015 years and 2001, the total manganese content increased. The increase was less than 12%. In 2015, the increase of effective manganese content in 30-45cm soil layer was 26.54%, and the increase of other soil layers was less than that of 6%. applying microfertilizer. The proportion of zinc in the total amount increased significantly. Especially in the surface soil, the mineral manganese is the opposite. The surface soil oxide binding state, the carbonate bound copper increased by 23.46 times and 16.35 times compared with the photographic ratio respectively. The correlation between the soil properties and the effective copper, manganese and zinc is not significant, but it has an influence on the form of trace elements: Hu Min acid and other forms except the exchange copper. There is a significant negative correlation between the state copper and the organic bound manganese; fulvic acid has a significant positive correlation with the oxide bound zinc. The effective copper has a significant positive correlation with the carbonate binding state, the oxide bound state and the organic bound copper; the exchange state copper loads are the largest in the second main components, and these four forms are the source of the effective copper in the soil. There is a positive correlation; the three forms are closely related to effective manganese in soil. The effective zinc is positively correlated with the exchange state, the oxide bound state, the organic bound zinc and the effective zinc. (8) the application of micro fertilizer to the effective amount of soil trace elements has the following interaction. Effect: zinc inhibits copper, but copper does not inhibit zinc; manganese is beneficial to copper, but copper inhibits manganese; zinc inhibits manganese, but manganese does not inhibit zinc; manganese fertilizer is beneficial to the increase of effective iron content in soil.
【學位授予單位】：中國科學院研究生院(教育部水土保持與生態(tài)環(huán)境研究中心)
【學位級別】：博士
【學位授予年份】：2016
【分類號】：S153.6
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本文編號：2120682
[Abstract]:The study of the effectiveness of trace elements in soil has become the focus of attention in the field of agriculture and environmental science. Fertilization is an important way for trace elements to enter the soil. The relationship between fertilization and the availability of soil microelements can provide scientific reference for agricultural production practice. This paper studies the long-term fertilization conditions. The contents, morphology, distribution characteristics and changes of soil trace elements were analyzed, the factors affecting the availability of soil trace elements were analyzed, and the mechanism of the change of soil trace elements was discussed. The main conclusions were as follows: (1) long term crop and fertilization reduced soil pH value and calcium carbonate content, and increased soil organic content. The soil pH value of Alfalfa continuous cropland soil in.2015 year was most lower than that in bare land, which decreased by 0.44 pH units compared with bare land. Compared with 2002, the content of calcium carbonate in plough soil of grain and bean rotation system was lower than that in 2002. The accumulation of organic matter in the soil of Alfalfa continuous cropland soil was significantly increased by 134.9% compared with that of bare land. In the system, the content of N and P organic fertilizer combined with 0-15cm and 15-30cm increased by 34.3 times and 11.69 times compared with that of no fertilizer. The ratio of soil Hu Min acid to fulvic acid under continuous fertilization was greater than 1., and the total amount of soil reductive substances was increased by organic manure, and the nitrogen and phosphorus organic fertilizer in the crop crop rotation system applied to the soil of the plough layer. Increasing 107.14%. (2) crop planting and fertilization increased soil effective copper and iron content. Fertilization could increase soil effective manganese content. Alfalfa, wheat continuous cropping and application of organic manure could significantly increase the content of available zinc in soil. Compared with 2002, the maximum amount of effective copper and manganese content in the plough soil was increased in 2015. The single application of organic fertilizer 0.69 mg kg-1 in wheat continuous cropping system, nitrogen and phosphorus organic fertilizer in grain and bean rotation system with 58.91%. alfalfa continuous cropland soil available zinc, 1.95 times and 2.05 times more iron than in 2002. (3) the main existence form of trace elements in the soil is mineral state, manganese oxide binding state is also more than the proportion of manganese. Compared to 2002 and 2002, the distribution of copper, zinc and iron changed little, but the distribution of manganese was greatly changed, which showed that the proportion of mineral state and exchangeable manganese increased, and the ratio of the carbonate bound state, oxide bound state and organic manganese was reduced. (4) long-term planting and fertilization on soil zinc and copper activation were very important. In.2015 years, the exchange state manganese and iron content in the exchange state increased most significantly, and increased by 8.03 times compared with the bare land. The nitrogen and phosphorus organic fertilizer in the grain bean rotation system increased the exchangeable iron in the soil of the plough layer more, and increased the 84.36%. form of copper, compared with the non fertilizer application, and the zinc content was planted and applied with the crop. The mineral state copper increased only when the fertilizer was applied, but the combination state of the soil carbonate, the oxide bound state, the organic bound copper increased more in the continuous cropping system of the wheat continuous cropping system, and increased the oxide binding state of the 2.01mgkg-1,1.7mgkg-1,3.54mgkg-1. alfalfa continuous cropland soil, respectively, compared with the 2002. The increase of zinc is more, compared with the increase of the 94.26%. crop in 2002, it only reduces the manganese content in the carbonate bound state. The combined manganese content in the alfalfa continuous cropping 0-15cm and the 15-30cm soils decreases more. Compared with the 2002, the organic bound manganese in the 15-30cm soil in the continuous cropping system of 59.95mgkg-1 and 35.65mgkg-1. is significantly increased. Under the condition of no fertilization, the combination of 0-15cm and 15-30cm soil carbonate in the wheat continuous cropping system increased by 114.52% and 183.69% compared with that of 2002, and the organic bound iron increased by 1.08 and 3.3 times respectively. Manganese and iron content. In the grain and bean rotation system, the organic combined manganese in the soil of single phosphate fertilizer layer increased significantly, 8.2 times higher than that of no fertilizer. (5) the soil pH value was negatively correlated with the effective copper, manganese, zinc and iron under the long-term crop planting and fertilization, and the effective phosphorus, the humic acid and the fulvic acid were the opposite; the soil organic matter and the reductive substance were in the opposite direction. The total amount is negatively correlated with the effective copper, which is opposite to the effective manganese, zinc and iron; the soil moisture is positively correlated with the effective copper and zinc, but is negatively correlated with the effective manganese and iron. The highest direct path coefficient between the dtpa-cu, Mn, Zn and Fe is 0.781, the humic acid 0.652, the organic matter 0.895, the organic matter 0.83. and dtpa-cu, Mn, Fe content. The higher negative effects are the total amount of reductive material -0.509, fulvic acid -0.595, calcium carbonate -0.501. (6) in the long-term crop planting and fertilization conditions, the exchange state copper, manganese and iron are positively correlated with the effective quantity, and the direct path coefficient of the effective quantity is also the highest, respectively 0.829,0.445 and 0.122. The exchange state is the direct and main soil effective quantity. There is a positive correlation between the carbonate bound copper and the effective copper, and the maximum path coefficient of the exchange state copper is 0.479, indicating that it can increase the content of the effective copper in the soil through the transformation of the exchangeable copper. The direct path coefficient of the mineral copper and the effective copper is higher than that of the copper, and the visible copper is the Reserve Bank of the effective copper source of the soil. The correlation coefficient of the combined state of acid, the organic binding state and the effective manganese, zinc and iron, the direct path coefficient are positive, indicating that these two forms are the source of the soil effective quantity. The oxide bound zinc is significantly positively correlated with the effective zinc, and is also an effective source of soil zinc. (7) the long-term application of micro fertilizer increases the soil organic matter and the total amount of reductive substances.2015 The total amount of organic matter and reductive substance in the surface soil of copper fertilizer was increased by 25% and the soil calcium carbonate was increased by 25% and the application of micro fertilizer to the photographic ratio. The content of effective phosphorus, Hu Min acid and fulvic acid were mostly reduced. The content of calcium carbonate in 15-30cm soil was most significantly reduced by 0-15cm, and 32.35 decreased compared with the photographic ratio. %, 41.25%. application of Zinc Fertilizer on the surface soil effective phosphorus content decreased most, decreased the ratio of Hu Min acid and fulvic acid after 55%. application of micro fertilizer was less than 1. application manganese fertilizer surface soil Hu Min acid content decreased most, the decrease of 77.87%. application zinc fertilizer subsurface soil rich acid content increase the maximum, 2.27 times. After long-term application of micro fertilizer, soil copper, The total and effective amount of zinc increased significantly. The surface accumulation was obviously all copper in the surface soil of.2015. The total zinc content increased by 131.82% and 108.71%, respectively. The content of effective copper and zinc increased by 6.03 times and 6.97 times compared with the photographic ratio. Total manganese content and effective manganese content did not significantly increase compared with.2015 years and 2001, the total manganese content increased. The increase was less than 12%. In 2015, the increase of effective manganese content in 30-45cm soil layer was 26.54%, and the increase of other soil layers was less than that of 6%. applying microfertilizer. The proportion of zinc in the total amount increased significantly. Especially in the surface soil, the mineral manganese is the opposite. The surface soil oxide binding state, the carbonate bound copper increased by 23.46 times and 16.35 times compared with the photographic ratio respectively. The correlation between the soil properties and the effective copper, manganese and zinc is not significant, but it has an influence on the form of trace elements: Hu Min acid and other forms except the exchange copper. There is a significant negative correlation between the state copper and the organic bound manganese; fulvic acid has a significant positive correlation with the oxide bound zinc. The effective copper has a significant positive correlation with the carbonate binding state, the oxide bound state and the organic bound copper; the exchange state copper loads are the largest in the second main components, and these four forms are the source of the effective copper in the soil. There is a positive correlation; the three forms are closely related to effective manganese in soil. The effective zinc is positively correlated with the exchange state, the oxide bound state, the organic bound zinc and the effective zinc. (8) the application of micro fertilizer to the effective amount of soil trace elements has the following interaction. Effect: zinc inhibits copper, but copper does not inhibit zinc; manganese is beneficial to copper, but copper inhibits manganese; zinc inhibits manganese, but manganese does not inhibit zinc; manganese fertilizer is beneficial to the increase of effective iron content in soil.
【學位授予單位】：中國科學院研究生院(教育部水土保持與生態(tài)環(huán)境研究中心)
【學位級別】：博士
【學位授予年份】：2016
【分類號】：S153.6
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本文編號：2120682
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