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
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.
TUO Yun-Fei-,WANG Ke-Qin-,ZHANG Li-Juan- et al. Influence of fertilizer solution concentration on transfer and transform of soil moisture and nitrogen under intersection film hole irrigation[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(6): 541-546.
Fei Liangjun,Tuo Yunfei,Dong Yanhui. Experiment research on irrigation quota effect on nitrogen transformation under film hole irrigation for corn[J].Engineering Journal of Wuhan University, 2009,42(5):592-595.(in Chinese)
Cheng Dongjuan,Liu Ying,Gao Ran. Effect of fertilizer amount on dynamic change characteristic of soil nitrogen under film hole irrigation[J]. Journal of Irrigation and Drainage, 2012,31(2):38-41.(in Chinese)
Cheng Dongjuan,Zhao Xinyu,Fei Liangjun. Laboratory simulation experiment on nitrogen transformation and distribution under condition of film hole irrigation with urea solution[J].Transactions of the CSAE, 2009,25(12):58-62.(in Chinese)
Fan Yanwei,Ma Xiaoyi,Wang Bolei.Numerical simulation on soil wetting pattern moisture distribution and infiltration characteristics for film hole irrigation[J].Transactions of the Chinese Society for Agricultural Machinery, 2008,39(11):35-41.(in Chinese)
Fei Liangjun,Zhu Xinghua,Wu Junhu.Infiltration reduction effect and mathematical model of bilateral interfe-rence infiltration in film hole irrigation[J]. Journal of Hydraulic Engineering, 2006,37(1):104-108.(in Chinese)