How to spray fertilizer on cotton leaves at different times

Spraying fertilizer at the seedling stage of seedling stage can promote the early development of cotton seedlings, promote the transformation of weak seedlings into strong seedlings, and control plant height to prevent lengthening. Generally, spray 1% urea and 1% to 2% superphosphate soaking filter mixture 50-75 kg.

Potting potassium ferric phosphate can be used in cotton fields where bud growth is normal.

300-500 times liquid plus appropriate amount of zinc fertilizer spraying; cotton plant growth peak appears before flowering, nutrient growth is too fast, will seal early, increase the middle and lower part of the bud bell, such cotton fields need to spray inhibitors, control cotton The main stem and fruit branches grow at the top. That is, in the cotton bud period, 1.5 grams of acetaminophen or amine is used, and 50 kilograms of water is sprayed.

The cotton boll flowering in the flowering and bolling period requires a large amount of fertilizer, which is a key period for the formation of yield. The plant is short, the root system is underdeveloped, and the leaf color is dark in the purple cotton field. The spray of 2% superphosphate or 0.2%-0.3% potassium dihydrogen phosphate solution 60 kg can reduce the effect of bud bell falling off and strong peach velvet. . When the growth is not prosperous, when the leaves are light yellow, 50 kg of 1% urea solution can be sprayed per mu.

During the boll opening period of the cotton-spraying period, the vegetative growth almost stopped, the leaves gradually became aging, and the ability of the roots to absorb the fertilizer was weakened. Cotton with de-fertilization and premature aging can be sprayed with 1% to 1.5% of urea solution 60-75 kg; cotton fields with normal growth or growth are prosperous, and 2% to 3% of superphosphate leaching solution is sprayed 60-75 kg. Prevent premature aging and promote precocious puberty. For the late-ripening cotton, when harvesting, the mu is sprayed with 40% of ethephon 100-150 g and 30 kg of water to promote cotton precocity and increase the grade of cotton.

(Li Mei Liu Xin)


Jinnong Net

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