氟节胺与缩节胺联合使用对棉花生长发育调控的影响

【目的】 研究氟节胺和缩节胺用于棉花的整枝塑型对其株型的影响。【方法】 在棉花盛蕾期和初花期施药相同,为缩节胺2 g/667 m²和5种不同浓度氟节胺,打顶期喷施缩节胺3 g/667 m²和5种不同浓度氟节胺,分析对棉花株型的影响。【结果】 氟节胺与缩节胺联合使用可抑制棉花株高、油条、上、中、下部果枝、节间距的生长,增加总果枝数、有效果枝数和各部位棉铃数。氟节胺浓度为40 、120 mL/667 m²时棉花株高、各部位的节间距的生长抑制效果最强,增长量分别为24.22、1.02 、5.06 和5.39 cm。氟节胺浓度的增加或减少均会减弱对棉花株高和节间距的抑制效果。氟节胺浓度为60、180 mL/667 m²时油条和上、中部果枝生长抑制效果最强,增量分别为4.54、7和6.83 cm。【结论】 氟节胺与缩节胺在棉花盛蕾期和初花期,联合使用可以抑制棉花侧枝生长可达到对棉花塑型的效果,打顶期喷施可达到封顶的效果。

Study on the Regulation of Cotton Plant Shape by Mixing Flumetralin and Mepiquat

【Objective】 To study the effects of flumetralin and mepiquat chloride on the growth and development of cotton lateral branches. 【Method】 In this experiment, the effects of spraying different concentrations of the flumetralin combined with mepiquat chloride or single mepiquat chloride on the growth and development of cotton collaterals at full bud stage, early flowering stage and topping stage were studied. 【Result】 Fumetralin combined with mepiquat could inhibit the growth of cotton plant height, fritters, upper, middle and lower fruit branches and internodes, and increase the total number of fruit branches, the number of effective branches and the number of cotton bolls in each part. When the concentration of flumetralin was 40 and 120 ml/667 m², the growth inhibition of cotton plant height and internode spacing was the strongest, and the growth rates were 24.22, 1.02, 5.06 and 5.39 cm. With the increase or decrease of flumetralin concentration, the inhibitory effect on cotton plant height and fruit joint spacing was weakened. When the concentration of flumetralin was 60 and 180 mL/667 m², the growth inhibition effect of fritters and upper and middle fruit branches was the strongest, with increments of 4.54, 7 and 6.83 cm. 【Conclusion 】 The combination of flumetralin and mepiquat chloride can inhibit the growth of cotton collateral in the bud stage and early flowering stage, achieve the effect of cotton shaping and the effect of capping can be achieved by spraying at the top stage.