Late-dense-simplified cotton cultivation method adopting chemical topping

Abstract

The invention discloses a late-dense-simplified cotton cultivation method adopting chemical topping. The late-dense-simplified cotton cultivation method comprises the following steps of sowing in the first ten-day period of May, performing final singling at a 2-3-leaf stage, and controlling the density of reserved seedlings at 5,500 to 6,000 plants / mu; then spraying a chemical topping agent for three times: at the first time, spraying when 60 percent of plants in a cotton field reach 9 to 10 fruit branches, and spraying to tips of leaf branches and fruit branches by using a mixed liquid of mepiquat chloride and flumetralin according to the ratio of 2:1, at the second time, spraying when 60 percent of cotton plants in the cotton field reach 10 to 11 fruit branches, and spraying to top ends of cotton plant stems by using a mixed liquid of the mepiquat chloride and the flumetralin according to the ratio of 1:2; at the third time, spraying at the sixth to eighth day after second spraying, and spraying to whole plants by using a mixed liquid formed by adding the mepiquat chloride and flumetralin according to the ratio of 1:1, and 0.05 percent of urea. According to the late-dense-simplified cotton cultivation method disclosed by the invention, rotten bolls are reduced and premature senescence is alleviated by proper late sowing; density increasement and chemical topping are used to replace artificial pruning and topping, so that labor and time are saved, and net incomes are remarkably increased.

Description

technical field [0001] The invention relates to a cotton cultivation method, in particular to a chemically capped late dense (late spring sowing+high density+simplified pruning) cotton cultivation method, which is suitable for cotton areas in the Yellow River Basin. Background technique [0002] Cotton topping is an important technical measure that cannot be reduced or waived in cotton cultivation technology. It is usually operated manually, which is labor-intensive and time-consuming. Replacing manual topping with chemical topping is an important way to realize light and simplified cotton production. At present, chemical capping technology has been widely used in research and application in the inland cotton areas of Northwest China, such as the published "a cotton chemical topping method" (Chinese invention patent application number: 201210339336.1, applicant: Xinjiang Agricultural University), "a precocious New Cotton Chemical Topping Method in Cotton Area" (Chinese Inven...

AI Technical Summary

Problems solved by technology

This cultivation mode is not only labor-intensive and time-consuming (3-4 workers are required for fine pruning of cotton fields per mu), but also has many rotten bolls and is prone to premature aging.

Under this cultivation mode, using the existing chemical pruning technology instead of fine pruning still has the following disadvantages: in order to increase the chemical control effect, it is necessary to increase the number of spraying of metrendamine and its flumetamine, and the total growth period needs to be sprayed. Apply 5 to 7 times, the operation is cumbersome, the manual input is large, time-consuming and labor-intensive; and affected by factors such as weather and soil fertility, it is difficult to grasp the time and dosage of mepteramine and flumetriamine application, which can easily lead to excessive control and production reduction. It is the occurrence of excessive growth

At the same time, since the planting density of the cotton area in the Yellow River Basin is far lower than the 12,000-18,000 plants / mu planting density in the inland cotton area of ​​Northwest China, although the use of multiple single-applications of benzylamine or fluorobenzamine can better control the longitudinal direction of cotton plants growth, but the lower fruit branches, especially the lateral growth of the leaf branches, are more serious, which can easily cause shade, resulting in more rotten bolls, cotton leaves falling off and not falling.

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