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| Influence of fertilizer solution concentration on transfer and transform of soil moisture and nitrogen under intersection film hole irrigation |
| Tuo Yunfei1, Wang Keqin1, Zhang Lijuan1, Fei Liangjun2 |
| 1.Environmental Science and Engineering Department in Southwest Forestry University, Kunming, Yunnan 650224, China; 2.Key Lab of Northwest Water Resources and Environment Ecology of MOE at Xi′an University of Technology, Xi′an, Shaanxi 710048, China |
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Abstract The formulas were obtained by analyzing the indoor experimental data of the distributing character of soil moisture and the transfer and transform of nitrogen under the condition of multidirection intersection film hole irrigation. The empirical formulas were put forward to indicate the relationship in wetting body among the soil moisture with the decreased quantity and rate, the soil ammonium nitrogen with the transformed quantity and rate, nitrate nitrogen with the transformed quantity and rate, fertilizer solution concentration and the infiltration time. The results show that the correlation coefficients of empirical formulas are all bigger than 0.900 0, while the standard errors are very small. Therefore, by the significance test of 0.05, it can be concluded that the formulas can reflect the law for the distributing character of soil moisture and the transfer and transform of nitrogen under the condition of multidirection intersection film hole irrigation with different fertilizer solution concentrations. It provides the scientific foundation for improving the utilization efficiency of soil moisture and nitrogen under the condition of film hole irrigation.
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Received: 28 January 2013
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