摘要
黄土旱塬连续 5年的定位试验结果表明 ,单施有机肥能增加土壤有机质及全氮含量 ,随施用年限延长 ,作物产量呈上升趋势 ;单施氮肥易造成土壤磷失调 ,单加磷则造成氮失调 ;氮磷肥配施增产效果显著 ,并有较好的培肥作用 ;有机肥与氮磷肥配合施用具有较好的增产和土壤培肥作用 。
The results of a five years fixed experiment showed that manure could increase soil organic matter and total nitrogen,and the crop yield went up with the year forward of fertilization.Single nitrogen fertilizer made the imbalance of soil phosphorus and single phosphorus fertilizer caused the imbalance of soil nitrogen. The combination of nitrogen and phosphorus could increase crop yield and enrich soil fertility significantly, the combination of manure,nitrogen, and phosphorus has the same effect as well as good soil betterment.So it is suggested that the combination of different fertilizers is the key to stress tolerance and reducing disasters in Loses Plateau.
出处
《水土保持研究》
CSCD
2003年第1期6-8,共3页
Research of Soil and Water Conservation
基金
国家科技攻关 (2 0 0 1BA5 0 8B18)
关键词
黄土高原
抗逆减灾
肥料定位试验
Loess Plateau
stress tolerance and reducing disasters
fixed experiment
