种植年限对蔬菜大棚土壤肥力的影响  

Influence of Cropping Duration on Soil Fertility in Vegetable Green-house

作　　者：熊汉琴[1] 王朝辉[2] 宰松梅[2] 

机构地区：[1]汉中职业技术学院(东区),陕西汉中723100 [2]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持研究》2007年第3期137-139,共3页Research of Soil and Water Conservation

基　　金：国家自然基金项目(40201028和30370843);农业部"948"重大研究项目(2003-Z53)

摘　　要：选取不同种植年限蔬菜大棚、露天菜地和一般农田,测定了土壤pH值、有机质、全氮、硝态氮、铵态氮、速效P、速效K和阳离子代换量等主要养分。结果表明:大棚土壤pH值小于露天菜地、小于农田土壤,随种植年限的延长土壤逐渐酸化。3年以后大棚菜地土壤已明显出现N、P严重富集,K含量降低,不同种植年限大棚土壤阳离子代换量随种植时间延长而下降。7年以后的大棚已大部分出现肥力障碍。Investigation and determination of several major nutrients in different cropping duration of vegetable, air-opening vegetable and cereal crop soils, chemical characteristic such as pH, organic matter, total, nitrate N, ammonium N, available P, and available K were invested. The results showed that the pH of the green-house soil was lower than that of the air-opening land soil and lower than that of the cereal cropland soil. The soil has showed obvious tendency to acidification. After 3-year, the green-house soil showed obvious enrichment of N and P, decrease of available K content. The positive ion exchange capacity of the green-house soil tends to decrease with the extension of green-house age. Soil in 7 year old green house showed obvious constrains of fertility.

关 键 词：蔬菜 大棚 种植年限 土壤肥力 

分 类 号：S606[农业科学—园艺学]