摘要
通过对黄泥田土７年肥力监测研究结果，有机肥与氮磷钾肥配合施用，作物产量稳定提高，比初始期增产１２．６％～２２．０％，比常规施肥增产１２．７％～１８．７％；土壤有机质和氮磷钾养分含量随施肥量增加而提高；无肥区速效养分含量因作物吸收而降低；休闲土壤速效钾随非交换性钾的释放而有所提高。揭示了掠夺式生产导致地力衰退，合理施肥是提高地力和作物产量的有效措施。
The results from monitoring the soil fertility of loess-liked soil after seven years showed that the cropyields of applying organic and N,P, K fertilizers were 12.6%～22.0%and 12.7%～18.7%more than thoseof the period before test and traditional application separately,that the contents of organic matter and N,P,Kwere increased with the increasement of fertilizer amount applied, that the active nutrient contents ofno-fertilizer applied plot were reduced because of crop absorption,that the active K content of the fallow soilincreases with the release of non exchangeable Kcation,that the pillage production caused the recession ofsoil fertility and the rational manuring was an effective measure for improving soil and raising crop yield.
出处
《贵州农业科学》
CAS
1996年第5期21-24,共4页
Guizhou Agricultural Sciences
关键词
土壤监测
土壤肥力
初始期
无肥区
休闲区
作物
soil monitoring
soil fertility
no-fertilizer applied plot
fallow soil
