At present, the season for cotton pruning is again, and according to many years of observations, under conditions of appropriate density, the hybrid pest-resistant cotton has a very close influence on the yield. The yield of bolls on the leaf branch can reach the whole plant. For the yield of 30-50%, due to the difference in variety traits, the number of leaf branches of hybrid insect-resistant cotton is generally 3-5. The specific pruning techniques are as follows:
1, according to the characteristics of cotton varieties and growing trend to determine the number of leaves to stay, first, early maturing varieties (such as the southern anti-series) leaves the top two strong leaves, the lower part of the weak leaves removed; second is the late-maturing varieties (such as Hunan Mixed cotton series) left the upper three or so strong leaf branches, and the lower weak leaf branches were all removed.
2. To shoot the branches and shoots, according to the growth of cotton (strongly stay weak and stay less), when the fruit branches reach 5-7 on the branch, you can hit the branches of the brain.
3, topping the brain, but also according to the cotton's appearance, growth and species characteristics, according to the high yield (mu yield more than 300 kg of cotton) requirements of cotton, general insect-resistant hybrid cotton to the top of the brain should be in July 25 Before and after the day, the height is controlled at around 120. Middle and early maturing varieties (such as the southern resistance series) and cotton fields with poor fertility should be properly towed early. Middle and late maturing varieties (such as Xiangza cotton series) and cotton fields with good fertility (fertility) should be towed to the top slightly later.
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