| 温室滴灌配施尿素下土壤微域内pH值的时空分布研究 |
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| 引用本文： | 吴大付,王小龙,朱东海,吴海卿,杨雪芹,刘卫星.温室滴灌配施尿素下土壤微域内pH值的时空分布研究[J].灌溉排水学报,2008,27(2). |
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| 作者姓名： | 吴大付 王小龙 朱东海 吴海卿 杨雪芹 刘卫星 |
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| 作者单位： | 1. 河南科技学院,河南,新乡,453003
2. 中国农业科学院,农田灌溉研究所,河南,新乡,453003 |
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| 摘 要： | 在农业生产实际中,温室滴灌并配合施用尿素的做法较为广泛。研究番茄定额施用尿素,试验结果表明,尿素在土壤脲酶的作用下迅速水解转化,生成大量NH4+而造成土壤pH值升高;在48～72h内在一定的土壤微域内形成一个相对较高的pH值区域;同时,土壤pH值经历了低—高—低的变化过程;随着施肥量的增加,其高值出现相对较早而平缓,维持时间较长。
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| 关 键 词： | 温室 滴灌 尿素 pH |
The pH Value's Space-time Distribution in Soil Little Intra-area for Greenhouse Drip Irrigation with Urea Utilization |
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| WU Da-fu,WANG Xiao-long,ZHU Dong-hai,WU Hai-qing,YANG Xue-qin,LIU Wei-xing.The pH Value's Space-time Distribution in Soil Little Intra-area for Greenhouse Drip Irrigation with Urea Utilization[J].Journal of Irrigation and Drainage,2008,27(2). |
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| Authors: | WU Da-fu WANG Xiao-long ZHU Dong-hai WU Hai-qing YANG Xue-qin LIU Wei-xing |
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| Institution: | WU Da-fu1,WANG Xiao-long1,ZHU Dong-hai2,WU Hai-qing2,YANG Xue-qin1,LIU Wei-xing1(1.Henan Institute of Science , Technology,Xinxiang 453003,China,2.Farml, Irrigation Research Institute,Chinese Academy of Agricultural Science,China) |
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| Abstract: | It is an ordinary method that using urea with dripping irrigation in greenhouse production.The paper reported the ration of urea was fertilized tomato.Every experimental plot was planted 8 seedlings,6 seedlings,4 seedlings and 2 seedlings,respectively.Per seedling was fertilized urea 0.46 g.The results show that the urea rapidly decomposed by the function of urease.The pH value was raised resulting in a great mount of NH+4 in the soil solution.After using urea from 2 to 3 days,there is a small region whose ... |
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| Keywords: | greenhouse drip irrigation urea pH value |
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