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湖北省咸宁地区位于长江中游南岸,北纬29°15′—30°,东经113°45′—115°12′年平均气温16.3—16.9℃,是双季稻主产地区。最近连续三年试种示范杂交早稻取得了较好效果,1986年全区种植16.2万亩,占全区早稻面积12.9%,比1985年增加5.7万亩,平均亩产450.5公斤,比1985年每亩增产19.5公斤,比常规早稻每亩增产24.1%。实践表明,鄂南地区温光资源丰富,热量条件基本能满足杂交早稻生长发育的需要。根据观察记载:杂交早稻威优49、威优17的生育期与我国大面
The Xianning region of Hubei Province is located in the south bank of the middle reaches of the Yangtze River with an average temperature of 16.3-16.9 ℃ at latitude 29 ° 15’-30 ° and longitude 113 ° 45’-115 ° 12’E. In recent three years, the demonstration early hybrid rice has achieved good results. In 1986, the region planted 162,000 mu, accounting for 12.9% of the whole area’s early rice area, an increase of 57,000 mu from 1985, with an average yield of 450.5 kg per mu Mu yield 19.5 kg, 24.1% more than the conventional morning rice yield increase. Practice shows that Wennan region in southern Hubei is rich in resources and caloric conditions can basically meet the needs of the growth and development of hybrid early rice. According to the observation records: hybrid early rice Weiyou 49, Weiyou 17 growth period and our large