丹江口水库消落带不同作物类型的土壤总氮分析
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摘要
通过采集丹江口水库周边消落带上不同作物类型的表层土壤,测定消落区0~10 cm(A)、10~20 cm(B)不同作物类型土壤的总氮含量,分析丹江口水库消落带上不同深度土壤氮含量的分布特征。利用分光光度法测出土壤样品的含氮量。结果表明:在消落带上,随着土壤深度的增加,不同作物类型土壤的总氮含量是降低的,说明了总氮含量随着土壤深度的增加而降低。在不同的作物类型中含氮量的区别,在A层南瓜地总氮含量最大,茄子地和大豆地次之,棉花地含量最低;在B层,同样,南瓜地总氮含量最大,绿豆地和玉米地次之,高粱地含量最低。土壤总氮的局部地域分布,在A层,含量最高的是郧县,丹江口市次之,淅川县最低,在B层,含量最高的是丹江口市,淅川县次之,郧县最低。
By collecting surface soil of different crop types in the peripheral zone of Danjiangkou hydro-fluctuation belt, the total nitrogen content of 0-10 cm(A) and 10-20 cm(B) soil layer were measured, and the distribution characteristics of soil nitrogen content in Danjiangkou hydro-fluctuation belt were analyzed. The content of nitrogen was determined by spectrophotometry. The results showed that in the hydro-fluctuation belt, with the increase of soil depth, the total nitrogen content of different crop types decreased, whichindicated that the total nitrogen content decreased with the increase of soil depth. In different crop types, thesoil nitrogen content was different, the total nitrogen content in A layer of pumpkin field was the highest, thenwas eggplant field and soybean field, the lowest was cotton field; in layer B, similarly, the total nitrogen contentin pumpkin filed was the highest, then was mung field and corn field, the lowest was sorghum field. The totalnitrogen content of A layer was the highest in Yun County, then was Danjiangkou City, and the lowest wasXichuan County; total nitrogen content of B layer was the highest in Danjiangkou City, then was Xichuan County, the lowest was Yun County.
By collecting surface soil of different crop types in the peripheral zone of Danjiangkou hydro-fluctuation belt, the total nitrogen content of 0-10 cm(A) and 10-20 cm(B) soil layer were measured, and the distribution characteristics of soil nitrogen content in Danjiangkou hydro-fluctuation belt were analyzed. The content of nitrogen was determined by spectrophotometry. The results showed that in the hydro-fluctuation belt, with the increase of soil depth, the total nitrogen content of different crop types decreased, whichindicated that the total nitrogen content decreased with the increase of soil depth. In different crop types, thesoil nitrogen content was different, the total nitrogen content in A layer of pumpkin field was the highest, thenwas eggplant field and soybean field, the lowest was cotton field; in layer B, similarly, the total nitrogen contentin pumpkin filed was the highest, then was mung field and corn field, the lowest was sorghum field. The totalnitrogen content of A layer was the highest in Yun County, then was Danjiangkou City, and the lowest wasXichuan County; total nitrogen content of B layer was the highest in Danjiangkou City, then was Xichuan County, the lowest was Yun County.
引文
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[2]程先富,史学正,于东升,等.基于GIS的土壤全氮空间分布估算—以江西省兴国县为例[J].地理研究,2007(1):110-116.
[3]殷明,施敏芳,刘成付.丹江口水库水质总氮超标成因初步分析及控制对策[J].环境科学与技术,2007(7):35-36,55,117.
[4]程瑞梅,王晓荣,肖文发,等.消落带研究进展[J].林业科学,2010(4):111-119.
[5]刁承泰,黄京鸿.三峡水库水位涨落带土地资源的初步研究[J].长江流域资源与环境,1999(1):75-80.
[6]白宝伟,王海洋,李先源,等.三峡库区淹没区与自然消落区现存植被的比较[J].西南农业大学学报:自然科学版,2005(5):119-122,126.
[7]郭泉水,洪明,康义等.消落带适生植物研究进展[J].世界林业研究,2010(4):14-20.
[8]郑海金,杨洁,谢颂华.我国水库消落带研究概况[J].中国水土保持,2010(6):26-29,68.
[9]李铭,朱利川,张全发,等.不同土地利用类型对丹江口库区土壤氮矿化的影响[J].植物生态学报,2012(6):530-538.
[10]张小勇,范先鹏,刘冬碧,等.丹江口库区湖北水源区农业面源污染现状调查及评价[J].湖北农业科学,2012(16):3460-3464.
[11]王磊.小流域农业非点源污染监测信息系统的设计与实现[D].武汉:华中农业大学,2008.
[12]徐国策,李占斌,李鹏,等.丹江中游典型小流域土壤总氮的空间分布[J].地理学报,2012(11):1547-1555.
[13]张晟,李崇明,付永川,等.三峡水库成库后支流库湾营养状态及营养盐输出[J].环境科学,2008(1):7-12.
[14]汤显强,杨文俊,尹炜,等.丹江口水库水体富营养化生态修复对策初探[J].长江流域资源与环境,2010(S2):165-171.
[15]雷沛,张洪,单保庆.丹江口水库典型入库支流氮磷动态特征研究[J].环境科学,2012(9):3038-3045.
[16]成庆利,王文林.丹江口水库水体三氮时空变化特征分析[J].河南农业大学学报,2007(1):52-55,72.