本文選題：濕地 + 農(nóng)田養(yǎng)分��； 參考：《干旱地區(qū)農(nóng)業(yè)研究》2017年04期

【摘要】：研究選取南泥灣濕地6種不同作物類別的農(nóng)田為樣地,并設(shè)荒野次生林地為對照,分0~10、10~20cm和20~30 cm土層深度采集土壤樣品,測定土壤養(yǎng)分含量,分析叢枝菌根(Arbuscular mycorrhiza,AM)真菌多樣性及其孢子密度。結(jié)果表明:0~30 cm土層范圍,土壤有機質(zhì)含量為7.54~17.23 g·kg~(-1),蔬菜地有機質(zhì)含量顯著高于其它地類;土壤速效氮含量為12.01~27.10 mg·kg~(-1);土壤速效磷的含量為3.08~9.67 mg·kg~(-1),云杉和林地土壤速效磷的含量顯著低于其它地類;土壤速效鉀含量為98.61~152.51 mg·kg~(-1);南泥灣農(nóng)田養(yǎng)分含量偏低,尤其缺乏土壤速效氮和土壤速效磷。試驗共分離出3屬10種AM真菌,其中球囊霉屬(Glomus)6種,占60%;無梗囊霉屬(Acaulospora)3種,占30%;盾巨孢囊霉屬(Scutellospora)1種,占10%。林地AM真菌物種豐度最大,其次是云杉,水稻地AM真菌物種豐度最小。地球囊霉(G.Geosporum)是優(yōu)勢種類,美麗盾巨孢囊霉(Scu.Calospora)屬于偶見種,摩西球囊霉(G.mosseae)只出現(xiàn)在耕作土壤。不同地類孢子密度差異顯著,以0~30 cm土層平均值比較:林地土孢子密度(2.24個·g~(-1))云杉幼苗地土孢子密度(2.18個·g~(-1))谷子地土孢子密度(1.46個·g~(-1))玉米地土孢子密度(1.31個·g~(-1))蔬菜土孢子密度(0.76個·g~(-1))水稻土孢子密度(0.73個·g~(-1))黃豆土孢子密度(0.67個·g~(-1))。
[Abstract]:Six different crop types of farmland in Nanniwan Wetland were selected as sample plots and wild secondary forest land as control. Soil samples were collected at a depth of 10 ~ 10 ~ 10 ~ 20 cm and 20 ~ 30 cm depth to determine soil nutrient content. The diversity and spore density of arbuscular mycorrhizae (AMN) fungi were analyzed. The results showed that the soil organic matter content was 7.54 ~ 17.23 g 路kg ~ (-1) ~ (-1) in the soil layer of 30 cm, and the content of organic matter in vegetable land was significantly higher than that in other plots. The content of available nitrogen in soil was 12.01 ~ (-1) ~ 27.10 mg 路kg ~ (-1) ~ (-1), the content of available phosphorus in soil was 3.08 ~ 9.67 mg 路kg ~ (-1) ~ (-1), the content of available phosphorus in soil of Picea spruce and forest land was significantly lower than that of other land, the content of available potassium in soil was 98.61 ~ (-1) ~ 152.51 mg 路kg ~ (-1) ~ (-1), the nutrient content of farmland in Nanmud Bay was low, In particular, soil available nitrogen and soil available phosphorus are lacking. A total of 10 species of AM fungi belonging to 3 genera were isolated, including 6 species of Glomusus (60 species), 3 species of Acaulospora (30 species) and 1 species of Scutellospora (10 species). The abundance of AM fungi in woodland was the highest, followed by Picea spruce, and the abundance of AM fungi in rice was the least. G. Geosporum (G. Geosporum) is a dominant species, Scu.Calospora) is a rare species, and G. mossea (G. mossea) is only found in cultivated soil. There were significant differences in spore density among different species. Comparison of soil spore density (2.24 g / g ~ (-1) spruce seedling soil spore density (2.18 g / g ~ (-1) millet soil spore density (1.46 g / g ~ (-1) soil spore density in cornfield (n = 1.31 g / g ~ (-1) soil spore density (0.76 g / g ~ (-1) soil spore density in wooded soil (2.24 g / g ~ (-1) spruce seedlings) The spore density of soybean soil was 0.73 (0.73).
【作者單位】： 延安大學石油工程與環(huán)境工程學院;
【基金】：延安市科技創(chuàng)新團隊項目(2015CHTD-04) 延安市科技項目(2014KS-03) 延安大學引導項目(YD2015-14) 國家級大學生創(chuàng)新項目(201510719260)
【分類號】：S154.3;S158
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本文編號：1816130