Abstract:

using the data of soil moisture of maize observation land sector in Xifeng agro-meteorological experimental station (1990 ~ 2007) and maize yield, As well as with it adjoining to meteorological data by Xifeng datum station, analyzed observed the land sector soil moisture change rule and its influence to the maize yield. The results shown that soil moisture storage change assumes the conic section, it minimum value appears in mid-August. The moisture consumption change assumes the straight line. The moisture storage are related the most remarkable time interval to joint pull out the male stage with the maize yield, joints to pull out the male 0~50cm soil moisture storage increase 10mm every time, the yield increases 180-210 kg/hm2.