土壤湿度与气象因子的关系分析
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摘要
基于西昌旱地土壤湿度资料,以备选因子是否加入上一次实测值为前提,对土壤湿度和气象因子进行逐步回归分析,结果表明,在所提供的备选因子中,降水量、蒸发量、无雨日数与土壤湿度相关关系更密切;加入上一次实测值作为因子,所生成的回归方程拟合精度和预测精度均明显提高。
The stepwise regression analysis of soil moisture and meteorological factors was carried out based on the soil moisture data of Xichang dry land and whether the last measured values was added to the selected factors. The results showed that the precipitation, evaporation and rainless days of the selected factors were more closely related to soil moisture, and after adding the last measured values as a factor, the fitting accuracy and prediction accuracy of the regression equation are obviously improved.
The stepwise regression analysis of soil moisture and meteorological factors was carried out based on the soil moisture data of Xichang dry land and whether the last measured values was added to the selected factors. The results showed that the precipitation, evaporation and rainless days of the selected factors were more closely related to soil moisture, and after adding the last measured values as a factor, the fitting accuracy and prediction accuracy of the regression equation are obviously improved.
引文
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[2]张鹏,易晓鑫,李桂霞,等.会理南阁乡植烟土壤中铅、镉、铬、砷含量测定及污染评价[J].西昌学院学报(自然科学版),2013(1):21-23,28.
[3]彭音,李静,巩发永.凉山州土壤和部分果蔬Cu、Cd含量关系及污染评价[J].西昌学院学报(自然科学版),2010(2):12-14.
[4]李凤霞,颜亮东,周秉荣,等.青海省降水与旱地土壤水分关系的研究[J].青海气象,2005(4):2-8,16.
[5]谷永利,刘学锋,杨贤,等.河北省土壤水分分布及变化特征[J].干旱区资源与环境,2011(3):118-121.
[6]王艳丹,张梦寅,范建成,等.金沙江干热河谷银合欢人工林的土壤水分变化特征[J].热带生物学报,2018(1):61-68.
[7]李涵茂,方丽,贺京,等.基于前期降水量和蒸发量的土壤湿度预测研究[J].中国农学通报,2012(14):252-257.
[8]陈少勇,郭玉珍,郑延祥,等.甘肃旱作农业区降水对土壤水分的影响[J].中国沙漠,2012(1):155-162.