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Detailed Explanation of Key Points of Scientific Irrigation Technology for Cotton

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Cotton is a taproot crop, with the main root penetrating relatively deep into the soil, making it a relatively drought-tolerant crop. The period from squaring to boll opening is the critical period for water demand. 1. Conventional irrigation: Irrigate 3-4 times throughout the growth period. The first irrigation is at the squaring stage, i.e., mid-to-late June; the second irrigation is at the full flowering stage, i.e., mid-July; the third is at the flowering and boll-setting stage, i.e., from late July to early August; by the initial boll-opening stage, if the weather is dry or the soil is sandy and prone to leakage, one more irrigation may be applied. If there is abundant rainfall and no sign of drought, watering may be discontinued. Apart from 120 cubic meters per mu for the pre-planting water, the irrigation quota for each application during the growth period is 6

Cotton is a taproot crop, with the main root penetrating relatively deep into the soil, making it a relatively drought-tolerant crop. The period from squaring to boll opening is the critical period for water demand.

1. Conventional irrigation: Irrigate 3-4 times throughout the growth period. The first irrigation is at the squaring stage, i.e., mid-to-late June; the second irrigation is at the full flowering stage, i.e., mid-July; the third is at the flowering and boll-setting stage, i.e., from late July to early August; by the initial boll-opening stage, if the weather is dry or the soil is sandy and prone to leakage, one more irrigation may be applied. If there is abundant rainfall and no sign of drought, watering may be discontinued. Apart from 120 cubic meters per mu for the pre-planting water, the irrigation quota for each application during the growth period is 60 cubic meters per mu. The irrigation quota per mu is 360 cubic meters. Small-border irrigation is adopted, and the area of each small border should preferably be 0.2-0.3 mu.

2. Drip irrigation under plastic film: The area of cotton under drip irrigation beneath plastic film in our county is large, and irrigation should be carried out scientifically according to the following irrigation scheme to ensure that the water-saving effect of drip irrigation is brought into play.

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