关键词: 花生, 花生, 覆盖方式, 土壤含水量, 土壤温度

Abstract: The objectives are to learn the climatic and ecological adaptability of super rice cultivation, rationally utilize climate resources and arrange the sowing period, and reduce the effect of agricultural meteorological disasters on the yield of double-cropping super early rice in Yiyang. Taking‘Zhuliangyou 819’ as a test material, a two-year experiment of sowing rice by stages was conducted. The differences of yield components at different sowing stages were analyzed, and the correlation between yield and climate was also analyzed. The results showed that the yield of the third sowing stage was the highest in the two consecutive years and the yield variability increased under different climatic conditions; the whole growth period of super rice was shortened with the delay of sowing date and the differences of different sowing dates mainly displayed in reproductive stage; the grain number per panicle was negatively correlated with the number of days from stem elongation stage to booting stage whose daily average temperature was no more than 22℃; days from milk grain stage to mature grain stage whose maximum temperature was no less than 35℃ exceeding five days could be used as a critical indicator of the occurrence of high temperature damage. The most optimum sowing time for double-cropping super early rice is late March to early April in Yiyang.