Since high temperature and drought are the most harmful to crops, and it is still impossible to control the occurrence of high temperature weather, starting from drought prevention work and timely irrigation, not only achieve the purpose of water temperature regulation, but also ensure the water supply of crops. To reduce high temperature hazards.
In general, three drops of water are given in July, each time around 10 days. At the same time, the principle of grasping the dripping water is “see dry, dry and dry”, but the amount of dripping should not be too large. In July, the high temperature, sand land water and fertilizer retention capacity is poor, it is recommended to drip 4-5 times in July.
This will help reduce field temperature, increase humidity, increase cotton sitting rate, and strengthen field water management to reduce wastage of water resources.
Third, after the top is finished, the fertilizer can be dripped and humic acid is added.
After the top water, 3-4 kg of urea, 5 kg of phosphate fertilizer, and 3 kg of potash;
The usage of the second water consumption is the same as above;
After the top third water urea 6-10 kg, phosphate fertilizer 5 kg, potassium fertilizer 4 kg.
At the same time, according to the situation, increase the amount of phosphorus and potassium fertilizer, especially the amount of potassium fertilizer, so that more nutrients go up first, so hot, do not eat something will collapse.
As the cotton roots after aging become aging, the "workload" of the roots has increased. Therefore, it is recommended to add about 300 grams of humic acid when dripping, which can promote rooting and prevent root aging; improve the drought resistance of cotton;
4. Application of boron fertilizer and zinc fertilizer
In order to prevent falling flowers and falling buds, you can spray Zn and Zn fertilizers 2-3 times. According to the current situation, it is generally possible to use 30 grams. In the full bloom period, 50 grams can be used, which should be adjusted according to the actual situation.
For the application of the application, it is recommended that about 50-80 grams of zinc fertilizer and boron fertilizer.
Both the boron fertilizer and the zinc fertilizer require a second dilution, whether it is spraying or dripping.
xxV. Prevention and control of pests and diseases
Focus on the control of cotton bollworm, red spider cotton leafhopper and other pests, to avoid a large number of falling buds caused by pests and diseases.
Control of cotton bollworm: It is recommended to use a vitamin salt or 9080 (chlorantraniliprole).
Red spider control: It is recommended to use professional acaricides such as avermectin + 哒螨灵. Use different acaricides to rotate to prevent the red spider from becoming resistant.
Cotton leaf mites: When cotton leaf mites enter the cotton field, they should be beaten as soon as possible. One spot was found to be hit, and the damage of cotton leaf mites was controlled to a minimum. It can be controlled by using 20% triclosanol 1000 times solution and dicofol sulfone 800 times solution.
The above dosage is only the theoretical recommended dosage, please choose according to your own situation.xx