摘要
采取种植４年５料作物不同肥水配合田间定位试验田块的土样，研究不同肥水条件对土壤供氮能力的影响。结果表明，施用氮肥能明显地提高土壤０～６０ｃｍ的ＮＯ－３－Ｎ、可矿化氮、有机质和全氮含量；这些测定值与施氮量间达到或接近显著相关。施肥对ＮＨ＋４－Ｎ含量影响不大；灌水对土壤矿质氮、有机质和全氮含量无显著影响，但有利于土壤有机氮的矿化。
The effects of different fertilizer and water conditions on N supplying capacities in dryland soil were studied in the long time experinrent fields with different fertilizer and water treatments for four years with 5 crops in succession.The results obtained showed that N fertilizer application obviously increased the contents of 0～60 NO - 3-N, mineralizable N,organic matter and total N,and there were significant correlations between them and N rates.But applying N fertilizer had no effect on NH + 4-N content in the soil layer.Also,irrigation had no obvious effect on the contents of mineral N, organic matter and total N,but it was beneficial to the mineralization of organic N.
出处
《西北农业大学学报》
CSCD
北大核心
1998年第6期1-5,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家自然科学基金
关键词
肥水条件
旱地土壤
供氮能力
土壤
氮
fertilizer and water conditions,dryland soil,N supplying capacity
