西峰麦田土壤水分动态分布特征

利用西峰1989~2004年3~11月的土壤水分资料,分析0~200 cm土壤贮水量的旬月变化、垂直分布特征和年际变化规律,以及逐月土壤含水量与冬小麦产量间的相关关系。结果表明:西峰土壤贮水量年季变化振荡明显,呈多波动变化,与降水量相关关系显著;一年中含水量最高的时段是11月和3月,最低的是6月和7月;0~30 cm为多变层,30~110为缓变层,110~200 cm为稳定层;土壤水分含量对冬小麦千粒重影响有两个显著阶段,分别是3~5月与9月,均达到α=0.01的信度水平。

Characteristic of soil moisture change of wheat field in Xifeng

The ten-day and monthly changes,the vertical distribution characteristic and the yearly changes of soil moisture as well as the relationship between the monthly soil moisture content and winter wheat output are analyzed by using the data of soil moisture during March to November from the year 1989 to 2004 in Xifeng.The results show that the annual vibration of the soil moisture content is obvious and with multiwaves;the content of soil moisture has obvious monthly change,the maximum of soil moisture content is in November and in March,and the minimum is in June and July;the content of soil moisture has a obvious vertical variation,it changes much in layer from 0 to 50cm,changes slow in layer from 60 to 130 cm,and stabilizes in layer from 140 to 200cm;the soil moisture content has two remarkable influence stages to the winter wheat output. they are in March to May and September,respectively.