不同粮草复种方式下土壤养分动态研究  

Variation of Soil Nutrients under Different Forage Grain Multi-Cropping Patterns

作　　者：朱练峰[1,2] 江海东[2] 金千瑜 禹盛苗 欧阳由男 曹卫星[2] 

机构地区：[1]中国水稻研究所,水稻生物学国家重点实验室,杭州310006 [2]南京农业大学农业部作物生长调控重点开放实验室,南京210095

出　　处：《土壤》2007年第4期637-642,共6页Soils

基　　金：江苏省国际科技合作计划项目(BZ2001038);国家科技部"十五"攻关项目(2004BA520A14)资助。

摘　　要：对6种不同的粮草复种方式下土壤养分的季节变化进行了比较研究。结果表明:冬季种植牧草与种植粮食作物比较降低了土壤pH值、增加了土壤有机质和速效养分,特别是冬季种植多花黑麦草和黑麦明显增加了土壤有机质、碱解N、速效K和速效P含量,促进后作生长,为后季作物增产提供可能性。土壤pH值随土层增加而增加,土壤养分随土层增加而减少。经过一个复种周期,各复种方式土壤pH值稍有提高;有机质、全N、碱解N含量稍有降低,变化不大;土壤速效P和速效K含量有较大幅度的降低。Seasonal variations of soil fertility of fields under six forage grain multi-cropping patterns, respectively, were studied. Results showed that cultivation of forage crops, especially ryegrass and rye, in winter improved soil properties over cultivation of grain crops by lower soil pH and increasing contents of organic matter and available nutrients, which contributd to growth and possibly yield of the crop to follow. Soil pH increased but soil nutrients decreased with depth of the soil profile. After a cycle of the multi-cropping cultivation, soil pH increased slightly, but organic matter, total N, and available N decreased a bit, and available P and K dropped by a large margin.

关 键 词：土壤 复种方式 有机质 速效养分 

分 类 号：S1583[农业科学—土壤学]