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	干旱半干旱地区农田土壤NO_3-N深层积累及其影响因素
其他题名	Accumulation of no3 -n in deep layers of dry farmland and its affecting factors in arid and semi-arid areas
	郭胜利; 张文菊; 党廷辉; 吴金水; 郝明德
来源期刊	地球科学进展
ISSN	1001-8166
出版年	2003
卷号	18 期号:4 页码:584-591
中文摘要	以长期试验资料为基础，着重分析了干旱半干旱地区农田系统中施肥、作物、降水、耕作措施以及土壤类型和特性对产生土壤NO_3-N深层积累的影响。分析发现，氮肥的过量施用和400～800 mm降水量偏低是导致干旱半干旱地区土壤NO_3-N积累在100～300 cm土层的主要因素。随着氮肥用量的增加，NO_3-N深层积累显著增加；氮磷配施有助于降低其积累量。不同作物对氮素的吸收利用效率也是影响NO_3-N深层积累的因素，作物之间的轮作方式会有效降低NO_3-N深层积累；休闲期种植合理植物可有效降低NO_3-N深层积累。NO_3-N深层积累主要产生在质地较重的土壤上，带正电荷粘土矿物对NO_3-N吸附是导致热带土壤中NO_3-N积累的主要因素。深入研究深层积累NO_3-N的生物有效性、迁移变化机理、与作物根系之间的关系以及对土壤性状和环境的影响具有重要意义。
英文摘要	Accumulation of N03 -N in deep layers is the unique of N cycle in rained farmland in the arid and semi-arid areas. Based on the long-term experiment, the effects of fertilization, crop, rainfall, tillage systems, rotation , and soil properties on the N03 -N accumulation were reviewed. The over application of nitrogen fertilizer and the precipitation of 400 -800 mm mainly contributed to the N03-N accumulation in the 100 -300 cm depth. The N03-N accumulation in the 100 ~300 cm depth was increased with the increase of N rates, fertilizer N incorporation with phosphate fertilizer could reduce the N03-N accumulation. The nitrogen usage efficiency also affect N03-N accumulation due to N uptake by crops, crop rotation and fallow crop could reduce the N03-N accumulation. N03-N accumulation was mainly developed in the soils with heavy texture. The clay mineral with large positive charge mainly contributes to N03-N accumulation in the tropical soils. The further research emphases about the N03-N accumulation in the deep depth were put forward as follows: bio-availability, transport in soil profile under rain fed or irrigation, the relation to crop root distribution and growth, and the effect of the N03 -N accumulation on soil properties and soil gas.
中文关键词	干旱半干旱地区 ; NO_3-N深层积累 ; 影响因素
英文关键词	Arid and semi-arid areas N03-N accumulation in deep layers Fertilization Rainfall Crop rotation Soil texture Soil properties Tillage systems
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:1312713
来源机构	中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203926
作者单位	郭胜利, 中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国.; 张文菊, 中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国.; 党廷辉, 中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国.; 吴金水, 中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国.; 郝明德, 中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国.
推荐引用方式 GB/T 7714	郭胜利,张文菊,党廷辉,等. 干旱半干旱地区农田土壤NO_3-N深层积累及其影响因素[J]. 中国科学院水利部水土保持研究所,2003,18(4):584-591.
APA	郭胜利,张文菊,党廷辉,吴金水,&郝明德.(2003).干旱半干旱地区农田土壤NO_3-N深层积累及其影响因素.地球科学进展,18(4),584-591.
MLA	郭胜利,et al."干旱半干旱地区农田土壤NO_3-N深层积累及其影响因素".地球科学进展 18.4(2003):584-591.