Leaf Fertilizer spraying Technology of Cotton in different periods
1. Spraying fertilizer on leaves at seedling stage can promote the early development of cotton seedlings, promote the transformation of weak seedlings into strong seedlings, control plant height and prevent overgrowth. Generally choose to spray 1% urea and 1% Mel 2% SSP filtrate mixture 50 Mel 75 kg.
2. Cotton fields with normal growth by spraying fertilizer at bud stage can be sprayed with 500 times solution of potassium dihydrogen phosphate and appropriate amount of zinc fertilizer; the peak of cotton plant growth occurs before flowering, and the vegetative growth is too fast, which will seal ahead of time and increase the shedding of buds and bolls in the middle and lower parts. This kind of cotton fields need to spray inhibitors to control the top growth of cotton plant main stem and fruit branch. That is, in the cotton bud stage, 1.5 grams of ketamine or regulating amine are used per mu and sprayed with 50 kilograms of water.
3. Spraying fertilizer at the flower and boll stage requires a large amount of fertilizer for cotton bolls, which is the key period for the formation of yield. The plant is short, the root system is underdeveloped, the cotton field with purple leaves, spraying 2% calcium superphosphate per mu or 0.2% UV 0.3% potassium dihydrogen phosphate solution 60 kg can reduce the shedding of buds and bolls and promote the cashmere of strong peaches. When the growth is sluggish and the leaves are yellowish, 50 kg of 1% urea solution can be sprayed per mu.
4. during the boll opening period, the vegetative growth of cotton almost stopped, the leaves aged gradually, and the ability of absorbing fertilizer and water in the roots was weakened. For cotton that is de-fatted and aged prematurely, 1% Mu of 1.5% urea solution can be sprayed with 60% MUR 75kg; in cotton fields with normal growth or prosperous growth, 2% Mu of 60MUR 75 kg of superphosphate leaching solution is sprayed to prevent premature senility and promote precocious maturity. Greedy green late-maturing cotton, at the beginning of harvest, the mu is sprayed with 40% ethephon 100ml 150g, adding 30kg of water, in order to promote the early maturity of cotton and improve the cotton grade.
- Prev
Seed production techniques of Cotton male sterile Lines
The technology of cotton male sterile line seed production uses insect-assisted pollination male sterile line hybrid seed production method, which overcomes the shortcomings of artificial de-pollination hybrid seed production method, which is widely used at present, such as time-consuming and labor-consuming, high intensity of work, complex management of seed production field and high cost of seed production. The labor consumption can be reduced by more than 50%, and the purity of hybrid seeds can be further improved. It is the most ideal way to produce cotton hybrid seeds. The seed production technique of cotton male sterile line is to cultivate recessive low phenol markers.
- Next
Application techniques of different Chemical Control agents in Cotton
Cotton chemical control is the use of chemical control means to shape cotton into an ideal plant type and create a population with high light efficiency, which can make the plant grow healthily, reduce the occurrence of diseases and insect pests, improve cotton yield and improve cotton quality. However, there are many chemical control agents at present, and the correct use technology should be adopted according to different agents in order to achieve better results. First, propranolol. At present, thalidomide is widely used in cotton chemical control, and the effect is ideal. It can reduce the plant height of cotton, reduce the number of fruit branches, promote the transfer of photosynthesis to reproductive growth, and reduce cotton bolls.
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