1993年,我们在湖南永兴县七甲乡,组织温优3号夏制高产制种试验。面积315.6亩,平均亩产278.4公斤,其中江头村制种专业户李建国1.46亩高产田,经验收,亩产达415.6公斤。创我县制种单产最高纪录。现将其主要技术措施介绍如下:(一)选择最佳抽穗扬花期,适时播种。制种基地属山区地带,海拔624米,根据当地自然条件,籼型杂交稻夏制的最佳抽穗扬花期为7月上、中旬。 In 1993, we organized the summer high-yielding seed production experiment of Wenyu No.3 in Qijia Township, Yongxing County, Hunan Province. An area of ​​315.6 mu, an average of 278.4 kilograms per mu, of which Jiangtou specialized households Li Jianguo 1.46 acres of high yield fields, the experience received, up to 415.6 kilograms per mu. Create a record of the highest yield of my county. The main technical measures are introduced as follows: (A) Select the best heading flowering, timely sowing. Seed production base is a mountainous area, 624 meters above sea level, according to local natural conditions, indica hybrid rice summer system of the best heading and flowering in July on the middle.