Fertilization Technology of Cotton in Huang-Huai-Hai region
1. The main problems
In Huang-Huai-Hai cotton area, the amount of nitrogen and phosphorus fertilizer is generally high, the application of organic fertilizer is insufficient, the amount of base fertilizer is too large, the amount of topdressing fertilizer is insufficient, and the lack of trace elements boron and zinc is more common.
two。 Principles of fertilization
(1) increase the application of organic fertilizer and advocate organic-inorganic coordination.
(2) according to the conditions of soil fertility, properly adjust and reduce the amount of nitrogen and phosphorus fertilizer, apply potassium fertilizer reasonably, and pay attention to the combined application of boron and zinc.
(3) nitrogen fertilizer should be applied in stages and appropriately increase the proportion of nitrogen fertilizer in the middle stage of growth.
(4) Fertilizer application should be combined with high-yield and high-quality cultivation techniques. 3. Amount and proportion of fertilizer application
Under the condition of 70 kg lint per mu, the total amount of fertilization is 2000 kg of high quality organic fertilizer, 11 kg of nitrogen fertilizer, 5 kg of phosphate fertilizer (P2O5) and 5 kg of potassium fertilizer (K2O) per mu. For the cotton fields with deficiency of boron and zinc, pay attention to the supplementary application of boron and zinc fertilizer, the amount of boron and zinc fertilizer is 1kg / mu, and the concentration of leaf spraying is 2g / L, which is carried out from budding to flowering stage.
35%-40% nitrogen fertilizer is used as base fertilizer, 30%-35% is used at early flowering stage, 25%-30% is used at full flowering stage, phosphate fertilizer is all used as base fertilizer, and potash fertilizer is used as base fertilizer or base dressing (early flowering stage). Starting from the full flowering stage, the cotton fields with weak growth were sprayed with 0.5%-1.0% urea and 0.3%-0.5% potassium dihydrogen phosphate solution 50% 75 kg / mu, once every 7-10 days, for 2 times in a row.
- Prev
Strengthening foliar fertilization to improve the boll rate of cotton
The ripening of summer crops in Haimen City has been delayed due to the influence of climate this year, and it has been in a state of drought since the summer harvest, and it did not rain heavily for several days until mid-July. The weather conditions before drought and rain are very disadvantageous to the living and growing plants that have been postponed transplanting cotton, and the growth process is about 10 days later than usual. In order to improve the rate of bud formation and boll formation rate in the later stage of cotton, it is suggested that foliar fertilizer spraying should be used to strengthen fertilization management in the later stage. 1. Grasp the rhythm of fertilizer in combination with pest control. Not every pest control has to be added.
- Next
Cotton is fastidious because of seedling fertilization at flowering and boll stage.
In June, there was frequent plum rain after cotton budding in Hubei cotton area. coupled with the differences in field management, the cotton growth progress was inconsistent. The cotton with earlier development has produced 1 or 2 peaches per plant, while the cotton with late development has just budded, and the difference in development progress is 20 to 30 days. Therefore, different measures should be taken in cotton fertilization management. Judging from the cotton seedling situation investigated in the field, Wang Hua, the 5th squadron of Nihu Battalion of Diaodong Farm in Hanchuan City, showed that half of the 26 mu cotton leaves were obviously short of potash fertilizer. It was suggested that he should make up immediately.
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