Surprise fertilization of cotton to promote recovery

Yang Xiushen, a researcher at the Institute of Economic crops of the Provincial Academy of Agricultural Sciences, said: since July, our province has been hit by torrential rains, resulting in widespread flooding of farmland and serious harm to cotton. At present, it is critical to reduce waterlogging and fertilize and promote recovery. At the same time, it is necessary to remove weeds and loosen soil roots in time, and do a good job of replanting and replanting because of the appropriate field conditions.

In order to remove the stagnant water in the field, we should take all necessary and possible means to remove the stagnant water in the field quickly, reduce the effect of waterlogging on the growth and development of cotton and reduce the mortality of cotton seedlings. For the low-lying areas, especially the flooded cotton fields in the sub-highlands, it is necessary to suddenly lower the water level of the outer three ditches; for the cotton fields that still have water at present, it is necessary to hit dams and build wetlands, and use rush drainage pumps to drain water so as to speed up the speed of drainage. For the cotton fields with unmatched ditches and low standards, we should suddenly increase the soil moisture ditches and open more drains. For the original field water system, it is necessary to clear the ditches and manage the soil moisture in time.

Surprise fertilization to promote the recovery of cotton affected by waterlogging, physiological function decline, poor fertilizer absorption capacity, growth inhibition, it is necessary to surprise fertilization to promote recovery. At present, the cotton fields that have eliminated stagnant water should immediately take the method of "catching up and spraying" to replenish fertilizer. "under the top" is to re-apply the first flower and boll fertilizer early, as long as the soil moisture permits and the field can stand, it should be topdressing with 8 kg of available nitrogen fertilizer per mu, 15 kg of phosphate fertilizer and 10 kg of potassium sulfate per mu. All fertilizers should be deeply applied in open ponds to reduce loss and waste and improve fertilizer utilization efficiency. "upper spraying" means spraying biochemical accelerators and foliar fertilizers such as 883 Fengchanling or 2% urea solution per mu, generally spraying once every 3 to 4 days, spraying 2 to 3 times in a row, supplementing and nourishing, so as to promote the transformation and growth of cotton seedlings as soon as possible. After cotton seedling transformation, due to timely chemical control of cotton seedlings, 25ml of boll Fengbao or double platinum per mu was sprayed to reduce the crazy branches of superfluous buds and improve the ventilation and light transmission conditions in the field.

After timely weeding and loosening the soil and blocking the root and waterlogging, the soil is hardened, the permeability is poor, the weeds in the field grow fast, and the contradiction with cotton for fertilizer and heat is very prominent. When the soil moisture permits and the field can stand, it is necessary to suddenly loosen the soil, break the consolidation, eliminate stubble, and remove weeds. At the same time, we should suddenly lift up the lodging cotton plants and transform the lower leaf branches in time. It is necessary to comprehensively cultivate the choked roots of the soil, form high-quality strips and ridges in cotton fields, and enhance the ability of cotton plants to resist disasters in the middle and later stages.

To do a good job of replanting in accordance with field conditions, for a small number of cotton fields that have been flooded for too long, such as dead leaves, rotten roots and dead seedlings, it is necessary to quickly change to other crops, such as sesame, carrots, autumn lettuce, summer Chinese cabbage, seasonal beans, edamame beans and other dry crops. For cotton fields with sporadic dead seedlings, lack of plants and broken ridges, and insufficient total population, we generally try to avoid replanting, mainly to protect seedlings, and vigorously develop three-dimensional intercropping in cotton fields. Dwarf crops such as autumn soybeans, sesame seeds and mung beans can be planted in places where plants are missing and broken ridges, so as to reduce waterlogging losses as far as possible and improve the efficiency of cotton fields.