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为揭示灌水定额对膜孔灌玉米农田土壤氮素运移转化特性,通过非线性回归法对不同灌水定额玉米膜孔灌施肥试验资料进行分析,研究提出了膜孔灌玉米农田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灌水定额和运移转化时间的经验公式.分析检验表明:经验公式的相关系数均大于0.9100,标准误差很小,且通过0.05的显著性检验,该经验公式可以反映膜孔灌条件下不同灌水定额的土壤氮素运移转化特性,该研究为提高膜孔灌氮素利用效率奠定了科学基础.
In order to reveal the transformation characteristics of irrigation quota on soil nitrogen transport by film hole irrigation in maize farmland, the data of hole irrigation experiment with different irrigation quota corn film were analyzed by non-linear regression method. Its conversion and conversion rate, soil ammonium nitrogen and its conversion and conversion rate and irrigation quota and migration transformation time of the empirical formula analysis showed that: the correlation coefficient of empirical formula are greater than 0.9100, the standard error is small, and by 0.05. The empirical formula can reflect the characteristics of soil nitrogen transport and transformation under different irrigation quota under the condition of film hole irrigation. This study lays a scientific foundation for improving the utilization efficiency of nitrogen in membrane hole irrigation.