| 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0～60 cm的NO3--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NH4+-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。 |
| 关键词: 肥水条件，旱地土壤，供氮能力 |
| DOI： |
| 分类号:S158.2 |
| 基金项目:国家自然科学基金资助项目（39770425） |
|
| The Effects of Different Fertilizer and Water Conditions on N-Supplying Capacities in Dryland Soil |
|
|
| Abstract: |
| 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 NO3--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 NH4+-N
content in the soil layer.Also, irrigation had no obvious effecton the contents of mineral
N,organic matter and total N, but it was beneficial to the mineralization of organic N. |
| Key words: fertilizer and water conditions,dryland soil,N-supplying capacity |
