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1. Conventional irrigation: Irrigation for 3-4 times in the whole growth period, the first irrigation in budding stage, that is, in mid-late June; the second irrigation in full blossom period, that is in mid-July; the third in flowering period, From the end of July to the beginning of August; to the early stage of boll opening, if the weather is dry or the sand can be irrigated once again. If there is more rainfall, drought-free elephants can no longer water, irrigation quotas in addition to irrigation and irrigation water 120 square meters per mu, during the fertility period, each irrigation of 60 acres per mu. Mu irrigation quota 360 square. With small irrigated irrigated, small buckwheat area is suitable for 0.2-0.3 mus.
2. Drip irrigation under the membrane: In my county, the drip irrigation area under the cotton membrane is large, and irrigation should be conducted according to the following irrigation scheme to ensure the water-saving effect of drip irrigation.
Cotton is a straight-rooted crop. The main root is deeply ploughed into the soil and is a drought-tolerant crop. The bud-to-boiling period is a critical period for water demand.