论文部分内容阅读
一、高度密植少留果枝是晋中棉花取得高产早熟的好办法晋中平川,位于东经111度45分～113度,北纬37～38度,海拔750～805公尺,属于特早熟棉区。自然特点是:无霜期短(140～160天),秋霜早(9月下旬～10月上旬),温度低(年平均9～10℃),高温期不长(7月24～25℃,8月23～24℃)。棉花有效开花期,自7月上中旬至8月上中旬,仅一个月时
First, a high degree of planting less fruitless branches is a good way to get cotton Jinzhong yielding premature Jinchuan Pingchuan, located in the longitude 111 degrees 45 minutes to 113 degrees north latitude 37 to 38 degrees, 750 to 805 meters above sea level, are particularly precocious cotton area. Natural features are: frost-free period is short (140 ~ 160 days), autumn frost early (late September to early October), low temperature (average annual 9 ~ 10 ℃), high temperature period is not long (July 24 ~ 25 ℃, August 23 to 24 ° C). Effective cotton flowering period, from mid July to mid August, only one month