Technical Measures for Nutrition Coordination in Maize Jointing

The whole growth and development process of maize is divided into seedling stage, jointing, booting stage and maturity stage. Among them, the management of jointing and booting stage has a great influence on the yield of corn. The central task of jointing and booting stage is to coordinate vegetative growth and reproductive growth, properly control the length of stems and leaves, and promote the growth of leaves, large ears and granules. Production. Its technical measures are:

First, the corn enters the jointing booting stage, that is, the big bell mouth period is sensitive to water. The plant needs water in the middle and late growth stages. The water shortage is poor fertilization, the leaves are prematurely degraded, the photosynthesis and nutrient transport capacity are decreased, the abortive grains are increased, and the grain weight is decreased. . When the relative water content of the soil is less than 70%, it is necessary to water it in time to avoid the drought and reduce production. In case of rainstorms, it is necessary to drain in time, especially during the grouting, it is necessary to pay attention to flood control and drainage.

Second, when the corn leaves grow to 9-12 leaves, they are sprayed with corn dwarf to control the length of the corn and control the plant height of the corn.

The third is to reapply the panicle fertilizer, apply the panicle fertilizer from the jointing to the end of the booting stage, and the fertilization period is generally in the 10-12 leaf stage (ie, the big trumpet period), which can ensure the growth of the plant, promote the development of the ear, promote the differentiation of the floret, and improve The number of solid particles. It should be based on nitrogen fertilizer, and 25-30 kg of urea should be applied per mu.

The fourth is to combine the cultivating and weeding and cultivating the soil. The hole between the two corns is about 10 cm deep, and the fertilizer is applied into the hole, and the soil is buried. It is necessary to timely cultivate the soil and thicken the soil layer at the root of the corn plant to form a high ridge of about 20 cm to prevent the corn from falling due to wind and rain.

The fifth is to remove weeds in time, remove tillers, and reduce nutrient consumption.

Sixth, it is necessary to control pests and diseases. In the corn big bell mouth period, the poisonous soil or granules mixed with soluble "Bataan powder" plus fine soil or cinder powder can be sprinkled into the corn heart. For the prevention and treatment of large and small spot diseases, it can be sprayed with water by using detoxifying special wettable powder and chlorothalonil wettable powder, spraying once every 7 days, and spraying continuously for 2 to 3 times.

Adding two fertilizers, cotton, disease resistance and yield increase

In the cotton production process, the disease occurs almost every year, which will affect the cotton yield to varying degrees, especially with Fusarium wilt, stem blight, blight, and red leaf stem blight. Fusarium is caused by pathogens. Disease, the latter is a physiological disease.

The disease area of ​​cotton wilt and withering and yellow-salted is mostly in the old cotton area where cotton has been grown for many years. It is usually spread by seed disease. In the conventional control measures, it is often used to replace disease-resistant varieties and The implementation of water and drought as the main, these two measures have certain control effect on blight, but some old cotton areas do not have rich water sources, only dryland crops can be planted. Some resistant varieties, although the performance against blight is better, but the high yield can not be synchronized, therefore, disease prevention must be another way.

Cotton blight usually occurs every year, and stem blight and red leaf stem blight occur every year. Last year, the area of ​​stem blight was large, and the loss was rare for many years. The peasants do not know the cause of the disease, but they can only complain that the weather is not good. In fact, these diseases are related to the lack of potassium fertilizer in cotton fields according to the extensive investigations conducted by our many years.

In recent years, through the practice of cotton production, scientific application of bio-organic compound fertilizer and potassium fertilizer can better prevent cotton wilt and blight, stem blight and red leaf stem blight.

Bio-organic compound fertilizer can inhibit cotton blight. Because of the organic matter in the bio-organic compound fertilizer and the various microbial fertilizers applied, the organic acid secreted can improve the soil environment and can significantly inhibit the survival of Fusarium oxysporum. In the application of base fertilizer or topdressing bud fertilizer, 100~150 kg of bio-organic compound fertilizer per acre can prevent the occurrence of blight, or greatly reduce the incidence and quickly restore normal fertility.

Potassium fertilizer can enhance cotton's defense ability against blight. First, the application of potassium fertilizer can coordinate the proportion of nitrogen, phosphorus and potassium fertilizer in the soil and enhance the activity of cotton itself. Second, the lack of potassium in cotton will reduce the supply of carbohydrates, and the synthesis of protein will be hindered. The third is the area of ​​transgenic cotton. Large, they have a slow conversion of potassium absorption, and do not apply potassium fertilizer and a small amount of potassium. The addition of potassium fertilizer increased the activity of cotton, and also enhanced the ability to prevent blight and blight, stem blight and red leaf stem blight. Therefore, applying about 60 kg of potassium sulfate or potassium chloride per acre can effectively enhance the resistance to several diseases in the above cotton.