Selection of Suitable Areas and Periods for Seed Production in Two-line Hybrid Rice Plants in Hainan
The risk of meteorological disasters in the seed production of two-line hybrid rice is a vital basis for the scientific and reasonable arrangement of the growth period of two-line hybrid rice.This study analyzed the probability of meteorological disasters in three crucial stages of the two-line hybrid rice seed production process,including the sensitive period of fertility,the period of heading,flowering,and pollination,and the period of seed maturation and harvest.The safe periods for seed production in each region and the meteorological disasters that need to be given special consideration were determined through data analysis and example verification.The sensitive period for two-line hybrid rice seed production in Hainan can be arranged from early March to mid-April;in the Sanya and Lingshui areas,it starts from early March;in Ledong,Dongfang,and Chang-jiang,it starts from late March to early April;and in Lingao,it is approximately mid to late April,with slightly different tem-perature limits.The rainy weather during the flowering period in each region is relatively random,and the probability is small.The Lingao and Changjiang areas need to pay special attention to dry and hot wind hazards during maturation and sow seeds earlier.Currently,the rice seed production areas and periods in Hainan are reasonable,and sowing can be appropriately ad-justed based on the threshold temperature of the sterile material and the length of tolerance to low temperatures.
万方数据
维普
