In the late growth stage of cotton, the absorption function of nutrients in roots is obviously reduced. At this time, foliar fertilizer is added to supplement nutrients, which has the functions of preventing premature aging, preventing disease, attacking peaches, promoting early maturity, and competing for high quality. The effect of increasing yield and increasing income is remarkable.
1. Spraying nitrogen to prevent premature aging In the late stage of cotton, spraying nitrogen fertilizer on the foliage can keep the cotton leaves green, enhance photosynthesis, prevent premature aging of nitrogen, and mix with Tianfengsu to increase yield. Spraying method: from late August to early September, 1% urea solution + 8 grams of Tianfengsu, spray once every 5 to 7 days, even spray 2 to 3 times, each time a spray of fertilizer 30 kg.
2, spraying phosphorus, potassium to prevent disease, premature cotton deficiency, in the flowering and ringing period is prone to red leaf stem blight (bleed), the cotton leaf becomes yellow or red after the onset, thickening and shrinking brittle, and finally fall off Causes premature aging of cotton plants, which can cause serious loss of production. Applying phosphate fertilizer in the late stage of cotton can promote the fullness of the seeds, increase the weight of the bolls, and prematurely boll. It can be sprayed with 0.3% potassium dihydrogen phosphate and 1% urea mixed solution, sprayed once every 5 to 7 days, and even sprayed twice, the cotton leaves can turn green quickly.
3, spraying boron attack large peach cotton plant lack of boron, side branches increased, fruit branches are high, leaves become thick, buds are easy to fall off, resulting in buds without flowers or flowers, flowers, less bells, less bells, low yield . Spraying the boron fertilizer solution in time can reduce the shedding, which is beneficial to multi-peaching peaches and knotting peaches. Generally, from the beginning of the bell, spray once every 15 days, even spray 2 to 3 times, each time spraying 0.2% of the boron fertilizer solution 30 kg per mu. When spraying boron, add 0.5% urea mixed spray, the effect is better. If borax is selected, it should be disintegrated with a small amount of warm water, then diluted with cold water and sprayed.
4. Zinc-spraying for high-quality cotton is a zinc-sensitive crop. In recent years, with the increase in nitrogen and phosphorus fertilizer application in cotton fields, the ratio of a large number of elements to trace element zinc is imbalanced. The available zinc in the soil could not be replenished in time, which affected the growth and development of cotton and limited the increase of cotton yield and quality. The addition of zinc fertilizer is beneficial to the synthesis of chlorophyll and auxin, which can promote the absorption of nutrients by cotton, coordinate the operation of nutrients and enhance photosynthesis. Spraying zinc fertilizer solution on the flowering and ringing stage of cotton can increase the lifespan of peripheral peach and prolonging functional leaves, increase the weight of bolls and clothing, and improve the yield and quality. Foliar spray is 0.2% zinc sulphate solution, generally sprayed 2 to 3 times, 30 kg per mu of spray fertilizer solution.
Foliar fertilizer should be sprayed before 9:00 am or after 5 pm on a sunny day to extend the wet time of the fertilizer on the leaves, which is beneficial to the absorption of the leaves. It is necessary to spray finely, especially paying attention to the spraying on the back of the cotton leaf to promote absorption and improve fertilizer efficiency. In order to save the process and exert the synergistic effect of each nutrient element, the above various fertilizers can be mixed according to the specific conditions. It can also be combined with the prevention and control of pests and pesticides to make it "one spray and more effective". Note that foliar fertilizer should not be mixed with alkaline pesticides, and grass ash should not be mixed with Other base foliar fertilizers. Phosphate should not be mixed with zinc fertilizer.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
1. Spraying nitrogen to prevent premature aging In the late stage of cotton, spraying nitrogen fertilizer on the foliage can keep the cotton leaves green, enhance photosynthesis, prevent premature aging of nitrogen, and mix with Tianfengsu to increase yield. Spraying method: from late August to early September, 1% urea solution + 8 grams of Tianfengsu, spray once every 5 to 7 days, even spray 2 to 3 times, each time a spray of fertilizer 30 kg.
2, spraying phosphorus, potassium to prevent disease, premature cotton deficiency, in the flowering and ringing period is prone to red leaf stem blight (bleed), the cotton leaf becomes yellow or red after the onset, thickening and shrinking brittle, and finally fall off Causes premature aging of cotton plants, which can cause serious loss of production. Applying phosphate fertilizer in the late stage of cotton can promote the fullness of the seeds, increase the weight of the bolls, and prematurely boll. It can be sprayed with 0.3% potassium dihydrogen phosphate and 1% urea mixed solution, sprayed once every 5 to 7 days, and even sprayed twice, the cotton leaves can turn green quickly.
3, spraying boron attack large peach cotton plant lack of boron, side branches increased, fruit branches are high, leaves become thick, buds are easy to fall off, resulting in buds without flowers or flowers, flowers, less bells, less bells, low yield . Spraying the boron fertilizer solution in time can reduce the shedding, which is beneficial to multi-peaching peaches and knotting peaches. Generally, from the beginning of the bell, spray once every 15 days, even spray 2 to 3 times, each time spraying 0.2% of the boron fertilizer solution 30 kg per mu. When spraying boron, add 0.5% urea mixed spray, the effect is better. If borax is selected, it should be disintegrated with a small amount of warm water, then diluted with cold water and sprayed.
4. Zinc-spraying for high-quality cotton is a zinc-sensitive crop. In recent years, with the increase in nitrogen and phosphorus fertilizer application in cotton fields, the ratio of a large number of elements to trace element zinc is imbalanced. The available zinc in the soil could not be replenished in time, which affected the growth and development of cotton and limited the increase of cotton yield and quality. The addition of zinc fertilizer is beneficial to the synthesis of chlorophyll and auxin, which can promote the absorption of nutrients by cotton, coordinate the operation of nutrients and enhance photosynthesis. Spraying zinc fertilizer solution on the flowering and ringing stage of cotton can increase the lifespan of peripheral peach and prolonging functional leaves, increase the weight of bolls and clothing, and improve the yield and quality. Foliar spray is 0.2% zinc sulphate solution, generally sprayed 2 to 3 times, 30 kg per mu of spray fertilizer solution.
Foliar fertilizer should be sprayed before 9:00 am or after 5 pm on a sunny day to extend the wet time of the fertilizer on the leaves, which is beneficial to the absorption of the leaves. It is necessary to spray finely, especially paying attention to the spraying on the back of the cotton leaf to promote absorption and improve fertilizer efficiency. In order to save the process and exert the synergistic effect of each nutrient element, the above various fertilizers can be mixed according to the specific conditions. It can also be combined with the prevention and control of pests and pesticides to make it "one spray and more effective". Note that foliar fertilizer should not be mixed with alkaline pesticides, and grass ash should not be mixed with Other base foliar fertilizers. Phosphate should not be mixed with zinc fertilizer.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
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