| 土壤容重对膜孔灌水氮分布和运移转化的影响 |
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| 引用本文： | 脱云飞,费良军,董艳慧,曹 俊.土壤容重对膜孔灌水氮分布和运移转化的影响[J].农业工程学报,2009,25(2):6-11. |
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| 作者姓名： | 脱云飞 费良军 董艳慧 曹 俊 |
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| 作者单位： | 1. 西安理工大学西北水资源与环境生态教育部重点实验室,西安,710048
2. 长安大学环境科学与工程学院,西安,710054 |
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| 基金项目： | 国家自然科学基金项目资助（50579064） |
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| 摘 要： | 为揭示土壤容重对膜孔灌条件下土壤水分分布特征和氮素运移转化的影响，通过土壤容重室内试验，利用非线性回归法对试验资料进行分析，研究提出了湿润体内土壤含水率及其变化量和变化率、土壤硝态氮及其转化量和转化率、土壤铵态氮及其转化量和转化率与土壤容重和运移转化时间的经验公式。结果表明：经验公式的相关系数均大于0.8200，标准误差很小，且通过0.05的显著性检验，可以反映膜孔灌条件下不同土壤容重的土壤水分分布特征和氮素运移转化规律。该研究为提高膜孔灌水氮利用效率提供参考。
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| 关 键 词： | 膜孔灌 土壤容重 水分分布 氮素运移转化 |
| 收稿时间： | 2007/11/26 0:00:00 |
| 修稿时间： | 2008/2/20 0:00:00 |
ffects of soil bulk density on distribution and transportation and transformation of soil moisture and nitrogen under film hole irrigation |
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| Tuo Yunfei,Fei Liangjun,Dong Yanhui and Cao Jun.ffects of soil bulk density on distribution and transportation and transformation of soil moisture and nitrogen under film hole irrigation[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(2):6-11. |
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| Authors: | Tuo Yunfei Fei Liangjun Dong Yanhui and Cao Jun |
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| Institution: | 1.Key Laboratory of Northwest Water Resources and Environment Ecology of Ministry of Education at Xi'an University of Technology;Xi'an 710048;China;2.College of Environment Science and Engineering;Chang'an University;Xi'an 710054;China |
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| Abstract: | In order to reveal the effects of soil bulk density on the soil moisture distribution and nitrogen transportation and transformation under the film hole irrigation, the indoor experiment of soil bulk density, was done and analyzed by the non-linear regression method, empirical formulas that indicates the relationship among the variable quantity and rate of soil moisture, the conversion quantity and rate of NO-3-N and NH+4-N, and soil bulk density, the transportation and transformation time were put forward. The results showed that correlation coefficients of empirical formulas were all bigger than 0.8200, standard errors were very small, and passed the 0.05 testing significance. So the formulas can reflect the distributing character of soil moisture and the regulation of nitrogen transportation and transformation for different soil bulk densities under the condition of film hole irrigation. This research result provides references for improving the utilization efficiency of soil moisture and nitrogen. |
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| Keywords: | film hole irrigation soil bulk density soil moisture distribution nitrogen transportation and transformation |
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