不同种植模式对温室菜地土壤硝态氮累积的影响  

Effects of Different Cultivation Models of Nitrate Accumulation in Greenhouse Vegetable Soil

作　　者：梁丽娜[1] 杨合法[2] 徐智[1] 张陇利[1] 李季[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100193 [2]中国农业大学曲周试验站,河北曲周0572500

出　　处：《土壤通报》2010年第3期711-715,共5页Chinese Journal of Soil Science

基　　金：北京市生态学重点学科(XK10019440);北京都市农业学科群建设项目(XK100190553)资助

摘　　要：针对长期实行有机模式、无公害模式和常规模式的温室菜地进行黄瓜生育期土壤硝态氮累积研究,结果表明,土壤硝态氮含量为有机模式〈无公害模式〈常规模式,有机模式硝态氮淋失最小,无公害模式次之,而常规模式硝态氮淋失最为严重。全生育期内0~200cm土体硝态氮总含量常规模式、无公害模式和有机模式分别为835、774和388kghm-2。有机模式并没提高土壤中有效硝态氮相对累积量,生育期内100~200cm土层硝态氮平均相对累积量常规模式、无公害模式和有机模式分别为53.8%、52.7%和55.7%。Based on a long- term experiment of organic, low- input and conventional model in greenhouse vegetable cucumber growing period, soil nitrate accumulation has been studied. The results showed that the nitrate content of soil in different crop patterns was organic low- input conventional. In the organic model, nitrate leaching was the least, followed by pollution- free model, and the conventional mode, nitrate leaching was most serious. In 0 - 200 cm soil nitrate average content of conventional model, low- input model and organic model were 835 kg hm-2, 774 kg hm-2 and 388 kg hm-2 during the whole growth period, respectively. Organic model did not effectively improve the soil nitrate relative to accumulation. The average soil nitrate relative accumulation of 100 - 200 cm conventional models, low- input model and organic model were 53.8%, 52.7% and 55.7%, respectively.

关 键 词：温室 有机模式 无公害模式 常规模式 硝态氮 

分 类 号：S157.1[农业科学—土壤学] S157.42[农业科学—农业基础科学]