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随着棉田化控技术的普及、苗床化控面积也越来越大。近几年,部分地区又推广了矮壮素浸棉种技术,以求延长矮化时间,提高控苗效果。但据我站1987～1989年的实践来看,矮壮素浸种利少弊多。1.发芽势弱,发芽率低。1989年4月我们为了验证1987、1988年在玉新村百亩丰产方进行矮壮素浸种后出苗低而不齐的原因,在温室中用盐棉48和泗棉2号各200粒,其中100粒浸清水为对照,100粒浸在170ppm 的矮壮素液中8小时,重复三次,置于秧盘进行保湿催芽。其结果、盐棉48用矮壮素液浸种的发芽势为26%,发芽率为78%,分别比清水浸的45.67%和82.33%低19.67%和4.33%;泗棉二号用矮壮素浸种的发芽势为14.33%,发芽率为67.31%,分别比清水浸种的39.67%和75.67%低25.34%和8.36%。
With the popularization of chemical control technology in cotton fields, seedbed control area is also growing. In recent years, some areas have also promoted the technology of cotton seed soaking Cucumber, in order to extend the dwarfing time and improve seedling control effect. However, according to my practice from 1987 to 1989, there is less harm in soaking CCC. 1. Weak potential weak, low germination rate. April 1989 In order to verify 1987 and 1988 in Yuxin Hundred acres of high-yielding plant seed soaking after the emergence of low and irregular reasons, in the greenhouse with salt cotton 48 and Simian 2 each 200, of which 100 Granules immersed in water as a control, 100 dipped in 170ppm chlorogenic acid solution 8 hours, repeated three times, placed in the tray for moisturizing sprout. As a result, the salt water 48 soaked seed germination potential was 26%, the germination rate was 78%, respectively, 45.67% and 82.33% lower than the clear water 19.67% and 4.33%; Simian II with chlormequat Soaking seed germination potential was 14.33%, the germination rate was 67.31%, which was 25.34% and 8.36% lower than the 39.67% and 75.67% of soaked seeds in clear water respectively.