摘要
以辽宁沈阳市郊某设施菜地土壤为研究对象,通过设置不同有机肥用量处理(0,20,60thm-2)的小区实验,系统研究不同有机肥处理对不同本底肥力设施菜地土壤全磷、速效磷含量变化的影响。研究结果表明,有机肥能够提高不同肥力设施菜地土壤0～20cm土层全磷含量,其中P1全磷含量与CK相比增加2.7～19.5%,P2增加7.6～33.6%。土壤0～20cm速效磷含量也随有机肥施用量的增加而明显增加,P2即有机肥施用量60thm-2时,不同肥力设施菜地土壤在黄瓜拉秧期速效磷含量与CK、P1之间均达显著差异(P<0.05)。本实验条件下,施用有机肥20thm-2,可保持施肥当季中肥力与高肥力设施菜地土壤磷素水平;当地常规有机肥施用量60thm-2可显著提高设施菜地土壤全磷与速效磷含量,从而加剧高肥力土壤磷素的累积,并对环境造成压力。
A field plot experiment was conducted in Shenyang suburb to study the effects of applying organic manure on the status of phosphorus in greenhouse soils.Three treatments（0,20,and 60 t hm-1 of organic manure） were installed in greenhouse fields with different soil fertility levels.The results showed that the contents of total P,available P in 0-20 cm soil layer increased with applying organic manure,being significant when the application rate was 60 t hm-1,while that in 20-40 cm soil layer had no significant difference among the treatments.Under the application of organic manure,the available P content in 0-20 cm soil layer increased before the stage of flowering and decreased then,while that in 20-40cm soil layer increased gradually from the beginning to fruiting stage.Applying 20 t hm-2 of organic manure could maintain the soil total P and available P level in middle fertility level and high fertility field,while higher application rates could induce the risk of soil P leaching.
出处
《土壤通报》
CAS
CSCD
北大核心
2011年第1期132-135,共4页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(30970479)
国家科技支撑计划项目(2006BAD17B07)
关键词
设施菜地
不同土壤肥力
有机肥
磷
Greenhouse soil
Soil fertility
Organic manure
Phosphorus
