Variations of Soil Moisture During the Growth Phase of Main Crops in Semi-arid Region in Gansu
Variations of Soil Moisture During the Growth Phase of Main Crops in Semi-arid Region in Gansu
复制标题
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Shi Xiaoxia
中科院分区：
文献类型：
--
作者：
Shi Xiaoxia
【摘要】：根据1971—2006年甘肃省半干旱地区春麦、冬小麦、荠菜、燕麦、马铃薯、豆类农田的土壤水分观测数据,采用EOF和小波分析方法,分析了该农田土壤水分的变化特征。结果表明,该地区土壤保持长期干旱,土壤水分有2年和4年的变化周期,土壤水分垂直变化随土壤呈递减趋势。土壤水分垂直变化与作物种类相关，不同作物消耗土壤水分具有明显的时空差异。
Based on the observed soil moisture dada in the farmland of springwheat,winter wheat,benne,oat,potato and bean from 1971 to 2006 in the semi-arid region of Gansu Province,the variation character of soil moisture in the farming land was analyzed by using EOF and wavelet analysis method.Results show that the soil there kept long-term drought,and the soil moisture had 2 and 4 years variation period.The vertical change of soil moisture presented decreasing trend with soil depth increase,and soil moisture dropped down during the period of crop growth,it was smaller in summer than that in other seasons.The vertical variation of soil moisture was correlated with the sort of the crop,different crops consuming soil moisture had the obvious spatio-temporal difference.