长期不同施肥对石灰性土壤微生物磷及磷酸酶的影响  

Long-term effects of different fertilization on calcareous soil microbial P and phosphatase

作　　者：谢林花[1] 吕家珑[2] 张一平[2] 

机构地区：[1]陕西科技大学资源与环境学院,咸阳712081 [2]西北农林科技大学资源环境学院,杨凌712100

出　　处：《生态学杂志》2004年第4期65-68,共4页Chinese Journal of Ecology

基　　金：国家自然科学基金重大项目资助 ( 3 9790 10 0 )

摘　　要：采用氯仿熏蒸提取法和磷酸苯二钠比色法分别测定了长期土壤培肥定位试验地所设置的不施肥、单施化肥、玉米秸秆 (低、中、高量 ) +化肥、厩肥 +化肥以及休闲 (低量秸秆 +化肥 )处理土壤微生物磷和磷酸酶活性。结果表明 ,各施肥处理均不同程度提高了土壤微生物磷 ;除休闲处理外 ,各施肥处理也不同程度提高了磷酸酶活性 ,这有利于为作物生长创造一种良好的土壤条件。石灰性土壤微生物磷与土壤全磷、速效磷之间存在明显的正相关 ,表明要改善石灰性土壤P利用率低的状况 。In this study,determination of soil microbial P and phosphatase activity of long term different fertilization treatments:no fertilizer,chemical fertilizers,corn straw(content of low,middle and high)+chemical fertilizers,animal manure and chemical fertilizers in combination,fallow treatment. The results showed that fertilization treatments increased soil microbial P,similarly,phosphatase activity were increasea by the fertilization of organic manure mixed with chemical fertilizers together.Calcareous soil microbial P was closely related with total P,labileorganic P and rapidly available phosphorus,this suggests the utilization rate of fixed P in calcareous soil could be improved by improving soil microbial P.

关 键 词：长期不同施肥处理 土壤微生物磷 磷酸酶活性 

分 类 号：S154[农业科学—土壤学]