Cotton drip irrigation
Field capillary laying problem
At present, more than 2.05 meters wide mulch is used in the production, and three or six rows of cotton are planted on the film. The use of a three-tube membrane is more conducive to the advantages of drip irrigation technology. If the soil is sandy, it is necessary to use a membrane and three tubes.
The water requirement rules of cotton during each growth period: less seedling stage and bud stage, more flowering and bolling period, and less need after boll opening. During sowing and emergence, the water in the 2Ocm soil layer should be about 70% of the maximum water holding capacity in the field; the water consumption in the seedling stage accounts for less than 15% of the total water consumption, and the daily water consumption intensity is 0.5-1.5m3/mu; The water consumption accounts for 12%-20%, the daily water consumption intensity is 1.5-2.0m3/mu; during the flowering and boll period, the water consumption accounts for 45%-65%, and the daily water consumption intensity is 2.5-3.0m3/mu; after the boll opening, The daily water consumption is less than 2m3/mu, and the water consumption accounts for 10%-20%.
Irrigation problem
Drip irrigation according to water supply conditions and cotton growth. The first drip irrigation time should be determined according to the situation: after sowing, the soil moisture in the field is insufficient, and the cotton should be drip irrigation in time. In the absence of a dry phase, the excessively strong cotton fields should be postponed to the drip irrigation in the Shengli period. Generally, the cotton fields can start drip irrigation in the early stage. The amount of drip irrigation should be sufficient for the first time, usually around 30 square meters. Irrid once in the next 7-10 days, and the flowering and bolling period is drip once every 7 days in the middle and late July. Irrigation 9-11 times during the growing period. Machine picking cotton generally stops in late August.
Advantages of drip irrigation
The cotton drip irrigation technology fully reflects the controllability of field irrigation. The variable irrigation land is a crop. Low pressure, small volume and multiple water supply can avoid deep leakage and limit the evaporation of roots between crops. In short, drip irrigation technology has been widely applied and applied so far. Compared with conventional seeding technology, the advantages are very obvious, which not only reduces the amount of seed used, but also reduces the labor intensity, frees more people from heavy labor and plays cotton. The effect of increasing production and increasing income, especially in the case of lower prices of new cotton purchases, the high yield and good quality of cotton planted by drip irrigation technology has largely offset the unfavorable factors brought about by the increase in agricultural prices and the lower purchase price.
Drip irrigation under the membrane changes the humidity in the field, and the damage of the field aphids and red spiders occurs early and heavy. It is necessary to pay attention to the occurrence of the field and timely spray control.