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为简化传统的棉花整枝技术,探索简化方法,促进棉花生产的发展,我们选用新型植物生长调节剂增棉灵30％水剂,做了化控试验。共设三个处理:①7月20日(打顶心期)喷一次;②7月20日、8月6日各喷一次;用药浓度为200ppm,折亩用药量33.4克/次(有效成份);③对照:喷清水。一次排列不设重复,供试品种为冀棉16号。现将试验结果整理如下: 喷药后7天,叶色渐变浓绿;15天后株高明显矮于对照,株型较紧凑;喷药后20天田间调查结果:平均株高较对照矮7.5厘米,顶部果枝与例第二果枝间距比对照短0.2厘米,顶部果枝平均节间缩短3.59厘米,倒二果枝节间缩短1.86厘米,脱落率较对照降低15.36％。吐絮期调查,喷两遍的,主茎株高比对照降低5.5厘米,自然株高降低41.2厘米。吐絮提早8天。
In order to simplify the traditional cotton pruning technology, explore the simplified method and promote the development of cotton production, we use the new plant growth regulator by cotton seedling 30% water, made a chemical control test. A total of three treatments: ① July 20 (top-beat) spray once; ② July 20, August 6 each spray; drug concentration of 200ppm, fold acupuncture dose of 33.4 g / times (active ingredient); ③ control: spray water. Once arranged without duplication, the test varieties for the Jimian 16. Now the test results are summarized as follows: 7 days after spraying, leaf color gradient dark green; 15 days after the plant height was significantly shorter than the control, plant type compact; 20 days after spraying the field survey results: the average plant height 7.5 cm shorter than the control The distance between the top fruit branch and the second fruit branch was 0.2 cm shorter than that of the control. The average internode shortened 3.59 cm on the top fruit branch and 1.86 cm between the two fruit branches. The drop rate was 15.36% lower than that of the control. Bolting floc season investigation, spray twice, the main stem height reduction of 5.5 cm compared with the control, the natural plant height decreased 41.2 cm. Bolt flutter early 8 days.