In the process of cotton planting, water and fertilizer have a very important impact on the growth and yield of cotton. For the water and fertilizer demand of 500 kg of seed cotton per mu, we can carry out the following aspects**.
First of all, we need to understand the nutrients that cotton needs to grow. Cotton growth requires a lot of nutrients, including nitrogen, phosphorus, potassium, calcium, magnesium, etc. The ** of these nutrients is very important for the growth and development of cotton, among which nitrogen, phosphorus, and potassium are the three elements that are most demanded. Therefore, when formulating water and fertilizer management programs, the type and amount of fertilization should be determined according to the fertilizer demand characteristics of cotton and soil nutrient status. To achieve 500 kg of seed cotton per mu, it is generally believed that 45-55 kg of urea, 25-35 kg of phosphate fertilizer, and 20-30 kg of potassium fertilizer need to be applied during the whole growth period. The principle of fertilization is "light application of seedling fertilizer, stable application of bud fertilizer, and heavy application of flower boll fertilizer", and the amount of fertilizer can be appropriately adjusted according to the growth of cotton fields. Supplement the application of medium and micro fertilizers to enhance the stress resistance of cotton.
Secondly, we need to consider the irrigation method. Irrigation is a very important part of cotton growing. For the water and fertilizer demand of 500 kg of seed cotton per mu, the determination of irrigation amount should be comprehensively considered according to the growth stage of cotton, soil moisture content, climatic conditions and other factors. In general, cotton growth needs to keep the soil moist, and the amount of irrigation should be determined based on the amount of soil moisture evaporation and crop transpiration. In practice, the irrigation amount and frequency can be adjusted by observing the growth of cotton and the soil moisture status. For the pressurized drip irrigation cotton field, the cotton drip was 9 11 times during the whole growth period, and the water per mu was 320 350 cubic meters. The water was inlet in mid-June, and the water was stopped on August 25. The drip interval is 6-8 days.
Finally, we need to considerFertilization method。In the process of cotton growth, fertilization method has an important impact on the absorption and utilization of water and fertilizer. Generally speaking, cotton needs to be fertilized multiple times, and the type and amount of fertilizer applied each time should be determined according to the growth stage and fertilizer characteristics of cotton. In the early stage of cotton growth, attention should be paid to the application of nitrogen fertilizer and phosphorus fertilizer to promote the growth and development of cotton;In the middle and late stages of cotton growth, attention should be paid to the application of potassium fertilizer and micronutrient fertilizer to promote the yield and quality of cotton.
In practice, we can determine the specific fertilization plan according to the local soil and climatic conditions. At the same time, we also need to pay attention to the following points:
1.Avoid over-fertilizing. Excessive fertilization not only increases production costs, but also negatively affects the growth and quality of cotton. Therefore, when formulating the fertilization program, the type and amount of fertilization should be determined according to the fertilizer demand characteristics of cotton and the nutrient status of the soil.
2.Rational use of chemical fertilizers and organic fertilizers. Chemical fertilizer has the advantages of high nutrient content and fast fertilizer efficiency, but long-term use is easy to cause soil compaction and environmental pollution. Organic fertilizer has the advantages of comprehensive nutrients and long-lasting fertilizer effect, but the nutrient content is low and needs to be used appropriately. Therefore, when formulating a fertilization plan, chemical fertilizers and organic fertilizers should be reasonably matched to achieve the best fertilization effect.
3.Pay attention to the supplementation of micronutrient fertilizers. Trace elements have a very important impact on the growth and quality of cotton, but the demand for trace elements is relatively small. Therefore, when formulating the fertilization program, the type and amount of trace element fertilizer should be determined according to the fertilizer demand characteristics of cotton and the soil nutrient status.
In short, for the water and fertilizer demand of 500 kg of seed cotton per mu of cotton, we needThe specific fertilization scheme is determined by comprehensively considering the characteristics of cotton fertilizer demand, soil nutrient status, irrigation method and fertilization method. In practice, it is also necessary to pay attention to controlling the amount and frequency of fertilization to avoid the negative impact of excessive fertilization and excessive irrigation on the growth and quality of cotton. At the same time, we also need to strengthen field management and timely control of pests and diseases to ensure the normal growth and development of cotton.
The words of a family, it is inevitable that they are extreme and insufficient, please leave a message after the article to communicate!
*Editor: Tianshan Plant Protection,**Please indicate the source, offenders will be investigated!