摘要
采用微区模拟方法,研究了免耕条件下,玉米田土壤硝态氮、速效磷和速效钾含量的动态变化。结果表明：与常规耕作相比,玉米田免耕降低了土壤硝态氮、速效磷和速效钾三种养分含量。其中对土壤硝态氮含量影响最大,降低达显著水平;速效磷含量次之;对速效钾含量影响最小。0-20 cm土壤硝态氮含量免耕处理比翻耕处理低15.3%-51.2%。20-40 cm土壤硝态氮含量,免耕处理比翻耕处理低40.9%-46.7%。
The content of nitrate-N, through microplot trial was studied. The available-P2O5 and available-K2O in result showed that the content of soil the soil under no-tillage maize cropping nitrate-N, available-P2O5 and available- K2O decreased under no-tillage condition compared with conventionanl tillage. Among these, the content of soil nitrate-N was most significantly affeted. The content of available-P2O5 was affected secondly. The least affeted nutrition was avail- able-K2O. The content of soil nitrate-N under no-tillage was 15.3 % -51.2% lower than that of the conventional tillage in 0-20 cm, and 40.9% -46.7% lower in 20-40 cm.
出处
《华北农学报》
CSCD
北大核心
2008年第B06期201-203,共3页
Acta Agriculturae Boreali-Sinica
基金
河北省自然科学基金资助项目(C2006000760)
