【摘要】：基于三峽水庫巫山段和秭歸段消落帶海拔155~172 m區(qū)段經(jīng)歷水庫水位漲落前(2008年)和經(jīng)歷1次(2009年)、4次(2012年)、7次(2015年)水庫水位漲落后土壤化學(xué)性質(zhì)的長期定位監(jiān)測,研究峽谷地貌區(qū)消落帶土壤氮(N)、磷(P)、鉀(K)、有機質(zhì)(OM)含量和p H值的時空動態(tài)變化規(guī)律,并對其養(yǎng)分狀態(tài)進行評價.結(jié)果表明:隨著經(jīng)歷水庫水位漲落次數(shù)的增多,消落帶土壤全氮(TN)、速效氮(AN)、速效鉀(AK)和OM含量減少,全磷(TP)、全鉀(TK)、速效磷(AP)含量和p H值增加;經(jīng)歷水庫水位漲落前和經(jīng)歷1次水庫水位漲落后,消落帶各土層的TP、TK和AP含量為巫山樣地秭歸樣地,經(jīng)歷4次和7次水庫水位漲落后,變?yōu)轱鰵w樣地巫山樣地;隨著經(jīng)歷水庫水位漲落次數(shù)的增多,消落帶大多數(shù)土壤化學(xué)指標含量在土層間的差異減小.對照全國第二次土壤普查養(yǎng)分分級標準,經(jīng)歷7次水庫水位漲落后,秭歸樣地土壤TP和AP含量達到極高等級,巫山樣地土壤AP含量為高等級,其他指標為中等及以下等級.三峽水庫的水文特征、人為活動的干擾,以及不同土壤化學(xué)指標性質(zhì)的差異,是峽谷地貌區(qū)消落帶土壤N、P、K、OM含量和p H值時空變化的主要驅(qū)動因素.
[Abstract]:Based on the long-term monitoring of soil chemical properties of the Wushan section and Zigui section of the three Gorges Reservoir after the fluctuation of the reservoir water level (2008) and once (2009) 4 times (2012) and 7 times (2015) after the fluctuation of the reservoir water level, the subsidence zone of the Zigui section and the Wushan section of the three Gorges Reservoir have experienced a long-term monitoring of the soil chemical properties after the fluctuation of the reservoir water level. The temporal and spatial dynamic changes of organic matter (OM) content and pH value of soil nitrogen, (N), phosphorus, (P), potassium and (K), were studied and their nutrient status was evaluated. The results showed that the contents of total nitrogen (TN), available nitrogen (AN), available potassium (AK), total phosphorus (TP), total potassium (TK), available phosphorus (AP) and pH increased with the increase of water level fluctuation times. After going through the fluctuation of reservoir water level and one fluctuation of reservoir water level, the contents of TP,TK and AP in each soil layer of the subsidence zone are the sample land of Zigui in Wushan sample land, and after 4 and 7 times of fluctuation of reservoir water level, it becomes the Wushan sample land of Zigui sample land. With the increase of the times of water level fluctuation in reservoirs, the difference of most soil chemical index contents between soil layers is decreased. Compared with the nutrient classification standard of the second national soil census, after seven reservoir water level fluctuations, the soil TP and AP content in Zigui sample land reached a very high grade, the soil AP content in Wushan sample land was high grade, and other indexes were medium and below grade. The hydrological characteristics of the three Gorges Reservoir, the disturbance of human activities and the difference of the chemical properties of different soils are the main driving factors for the spatial and temporal variation of the content of N _ (P _ (P) P _ (N) K _ (O) and the pH value of the soil in the declination zone of the canyon geomorphology.
【作者單位】： 中國林業(yè)科學(xué)研究院森林生態(tài)與環(huán)境保護研究所/國家林業(yè)局森林生態(tài)環(huán)境重點實驗室;中國林業(yè)科學(xué)研究院華北林業(yè)實驗中心;河北省塞罕壩機械林場;
【基金】：“十二五”國家科技支撐計劃項目(2015BAD07B040301)資助~~
【分類號】：S153.6

【相似文獻】

相關(guān)期刊論文 前6條

1 艾麗皎;吳志能;張銀龍;;消落帶土壤環(huán)境研究進展[J];北方園藝;2012年17期

2 杜高贊;高美榮;;三峽庫區(qū)典型消落帶土壤粒徑分布及分形特征[J];南京林業(yè)大學(xué)學(xué)報(自然科學(xué)版);2011年01期

3 王征;汪昆平;方芳;付川;郭勁松;;三峽水庫蓄水后消落帶土壤有機質(zhì)和氮磷含量及分布特征[J];重慶三峽學(xué)院學(xué)報;2012年03期

4 王改改;傅瓦利;魏朝富;袁紅;;消落帶土壤鐵的形態(tài)變化及其對有效磷的影響[J];土壤通報;2008年01期

5 廖世純;韋橋現(xiàn);蒙炎成;高國慶;蔡健和;李揚瑞;張永祥;;4種植物的耐淹耐旱性及在消落帶中的應(yīng)用[J];中國水土保持;2009年05期

6 郭念;閆金龍;魏世強;王齊磊;高潔;;三峽庫區(qū)消落帶典型土壤厭氧呼吸對鐵還原及磷釋放的影響[J];水土保持學(xué)報;2014年03期

相關(guān)碩士學(xué)位論文 前5條

1 丁長歡;水熱變化對三峽水庫消落帶典型土壤有機碳礦化的影響[D];西南大學(xué);2016年

2 王春明;三峽庫區(qū)消落帶土壤N_2O排放及微生物群落結(jié)構(gòu)研究[D];重慶大學(xué);2016年

3 黃軒民;三峽水庫消落帶土壤碳氮磷分布及其交換通量研究[D];重慶大學(xué);2012年

4 吳韓;丹江口消落帶表層土壤理化性質(zhì)特征及水位影響研究[D];華中農(nóng)業(yè)大學(xué);2012年

5 李洪;官廳水庫消落帶土壤有機質(zhì)分布特征及其高光譜反演研究[D];首都師范大學(xué);2014年

，

本文編號：2239006