Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2023, Vol. 13 ›› Issue (3): 35-39.doi: 10.11923/j.issn.2095-4050.cjas2022-0005

Previous Articles     Next Articles

Defoliation & Ripping Agent: Effect on Cotton Yield and Application Analysis

JIN Lulu(), XU Min, WANG Zisheng()   

  1. Liaoning Institute of Cash Crops, Liaoyang 111000, Liaoning, China
  • Received:2022-01-19 Revised:2022-03-15 Online:2023-03-20 Published:2023-04-04

Abstract:

In order to study the effect of defoliation & ripping agent (Xinsaili) on cotton yield and its application, two cotton planting densities and two dosages were set up, and the yield, defoliating rate, boll opening rate and fiber quality were compared and analyzed. The results showed that the total yield of lint and seed cotton before frost was the highest when the density was 112500 plants/hm2 and the dosage was 2700 mL/hm2. The lint percentage was the highest when the density was 82500 plants/hm2 and the dosage was 1800 mL/hm2. Xinsaili had no obvious effect on the seed index, plant height, the height of the first fruit branch and the number of fruit branches in each treatment. For defoliation rate, the effect was better at the density of 82500 plants/hm2, the defoliation rate could reach 100% at the upper and middle positions of the plant, while the defoliation rate was over 92% at the density of 112500 plants/hm2. In terms of ripening, boll opening rate at the density of 82500 plants/hm2 was higher than that of 112500 plants/hm2. Xinsaili had a certain influence on the fiber quality, which was mainly shown as slight decrease of upper half length and breaking tenacity. Taken together, the application effect of Xinsaili is good, and it can be applied with suitable dosage in time before mechanical harvesting or when cotton flourishes in autumn but does not mature properly.

Key words: cotton, defoliant &, ripping agent, defoliation rate, boll opening rate, yield, fiber quality