Spraying fertilizer on cotton is good for increasing yield and less diseases and insect pests.
Spraying nitrogen fertilizer: urea can destroy the chitin of insects. When cotton aphids (especially aphids) occur, the mixture of urea, washing powder and water in the proportion of 4 ∶ 1 ∶ 400 is sprayed, which has obvious killing effect.
Spraying phosphate fertilizer: during the occurrence period of adult cotton bollworm, 1%-2% superphosphate leaching solution as foliar fertilizer can turn oxalic acid into calcium oxalate and lose its attraction to cotton bollworm. The duration of each phosphorus spray is generally 2-3 days.
Spraying potash: with plant ash 10 kg, 50 kg of water, soaking for 24 hours after filtration, take filtrate spray, can effectively kill aphids on cotton. In the middle and later stages of cotton growth, foliar spraying 1%-2% potassium chloride (or potassium sulfate, potassium nitrate) solution can prevent or reduce the occurrence of cotton red leaf stem blight.
Spraying boron fertilizer: boron fertilizer is one of the essential nutrient elements for the growth and development of cotton. 0.2% borax (or 0.1% boric acid) solution is sprayed on the leaves of cotton at bud stage, early flowering stage and boll stage; 15kg / mu is sprayed at bud stage, 35kg / mu at early flowering stage and 50kg / mu at flower and boll stage.
Spraying copper fertilizer: using 1 part of copper sulfate, 1 part of lime and 200 parts of water to prepare equal volume Bordeaux liquid, spraying in cotton seedling stage can control cotton seedling disease, and spraying in flower and boll stage can control boll disease and reduce boll rot.
Spraying daizhuangsu: in the cotton bud stage, for the cotton field suffering from Verticillium wilt, spraying 50ppm solution of 50kg / mu can alleviate the disease.
- Prev
Application of base fertilizer skillfully to cotton to maintain yield increase
The basic fertilizer of cotton field is to increase various organic fertilizers or biological organic compound fertilizer; secondly, to achieve formula fertilization and balanced fertilization, and the proportion of nitrogen, phosphorus and potassium is 3:1:3; thirdly, to increase potassium fertilizer for insect-resistant cotton, the base fertilizer per mu shall not be less than 15 kg, and zinc fertilizer 0.5~0.7 kg and boron holding capacity 0.4 kg shall be applied; fourthly, proper fertilization shall not be blindly pursued, and 25~30 kg of ternary compound fertilizer with high content shall be applied per mu; Fifthly, the fertilizer should be changed to trenching and strip application or hole application. The root system of cotton seedlings should be protected with fertilizer.
- Next
Spraying "seven liquids" on cotton increases production by 100 jin.
According to the experiments of our Institute of Agricultural Sciences and cotton farmers for many years, spraying the following nutrient solution during the application of insecticides to control insects in different growth stages of cotton can effectively increase the yield by 20% Mel 30%. The methods are introduced as follows: 1. Chicken manure: take 3 kg of fermented dried chicken manure, 2, add 7.5 kg of water, 3, soak for 30 hours, 4, cook 2 more for 5 and 3 hours, 6, filter out the residue, 7, and then ferment, 8, until the liquid surface appears white mold. 9, filter out the mildew, 10, add 50 kg of water, 11, spray evenly in 1 mu of cotton field. 12. Rabbit feces:
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi