摘要
1978～ 1998年在陕西关中地区农田的长期定位试验研究表明 ,长期单施化肥基本上可以维持土壤有机质和NP水平 ;单施化肥与化肥配合有机肥处理的作物产量基本相当 .但是 ,单施化肥处理使土壤腐殖质能量水平降低 ,分子缩合程度和芳构化度增大 ,“老化”作用增强 .
A long-term located experiment showed that single application of chemical fertilizer basically sustained the quantity le- vel of soil organic matter,nitrogen and phosphrous,reduced the energy level of soil humus and inhanced its condensation degree,aromaticity and aging function.The corp yield was basically the same as that of combined application with organic manure.
出处
《应用生态学报》
CAS
CSCD
2001年第4期569-572,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重大项目 (39790 1 0 0 )
关键词
长期定位试验
单施化肥
土壤性状
产量
Long-term located experiment, Singal application of chemical fertilizer, Soil properties,Crop yield.
