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  Based on the correlation analysis between the watermelon yield and meteorological variables at the different growing stages of the watermelon growing on gravel-covered land,the influence of climate on the yield of watermelon in the Xiangshan Mountain Areas of the Zhongwei City,Ningxia was investigated.A dynamic prediction model for watermelon yield was established.The results showed that the precipitation was the main factor which affected the growth of the watermelon growing on gravel-covered land.The precipitation both during the pre-seeding period and the whole growing season played a final role in determining the yield of watermelon.The vine stretch and melon inflation stages were the sensitive periods.The precipitation,mean relatively and mean wind speed significantly affected the watermelon yields.To some extents,the yield of the watermelon increased with the increase of the precipitation,while the watermelon yields decreased with the increase of the mean maximum temperature and wind speed,but with the decrease of the relative humidity.

Name source Xiangshan selenium sand melon is also known as the "Gobi watermelon" and "pressure sand watermelon," growth in Xiangshan area of Ningxia Zhongwei city. Xiangshan grow watermelon contains selenium element lack of body, named "selenium sand melon".Selenium sand melon, is from the stones grow big watermelon, the weathering, flash floods washed away to the valley sedimentation in Carboniferous based rock fragments.