The invention discloses a cotton no-
tillage summer direct seeding cultivation method. The method comprises the steps of (1) variety and seed selection, (2) seeding time, (3) chemical
weed control, (4)
seedling management, (5)
chemical regulation, (6) the fertilizing amount and fertilizing method, and (7)
ethephon ripening acceleration. In the step of chemical
weed control, after planting, preemergence herbicide is evenly sprayed in each 667 m<2>, and weeds are sealed. In the step of
seedling management, after cotton seedlings come up out of the ground, a half amount type
Bordeaux mixture is sprayed. In the step of
chemical regulation,
mepiquat chloride is sprayed at the
bud stage, at the initial bloom stage and after
topping stage respectively, and the dosage and the spraying frequency of the
mepiquat chloride are adjusted according to the
weather condition,
soil fertility, field density and cotton
plant growth vigor. In the step of the fertilizing amount and fertilizing method,
nitrogen of 12-14 kg is applied in each 667 m<2>, the
high dosage is used in cotton which is sowed before May 20th, and the low dosage is used in cotton which is sowed after May 20th. In the step of
ethephon ripening acceleration,
ethephon is sprayed, and the cotton boll opening rate can be improved by more than 20%. The method is easy to implement, operation is simple and convenient, and the effects of lowering cotton production cost, stabilizing or improving cotton yield, increasing cotton planting benefits and reducing environmental burdens are achieved.