In recent years, in the process of promoting new varieties of cotton and technical services in cotton areas, we often encounter problems in farmers' application of fertilizers. First, some cotton seedlings are used to prepare soil, and too much farmyard manure or chemical fertilizer is applied in the bauxite, so that some cotton seeds are sown after rotten or dead seedlings, and some of them are relatively homogeneous, but with the dead seedling root burn occurs; second seedbed emergence cotton, excessive application of fertilization, the two cotton cotyledons all scald scorch; Third time before the cotton seedling transplanting fertilizer was applied, some will be thrown into the fertilizer In the furrow, or apply the chemical fertilizer to the acupoint, the roots of the seedlings and the fertilizer applied are not separated by fine soil. The roots of the cotton seedlings are directly contacted with the fertilizer, and the young roots and young stems of the cotton seedlings are affected. After the fat damage, it turns brown or black, and the light cotton seedlings are stiff and not hairy, and the serious seedlings are dead; the fourth is excessive application of urea or ammonium bicarbonate such as ammonium bicarbonate during the bud period, or excessive high-efficiency multi-compound fertilizer, fertilization is not pay attention to costs, the blind pursuit of high yield cotton take the stand as early as a result, caused by soaring cotton, premature closure line, cotton shade severe, causing serious bugs Xiang and other pests, resulting in a large number of boll shedding, especially in rainy years, such The phenomenon is more common; the fifth is the flower Serious water loss, so that the lower stems and leaves of cotton plants are like burns, and the serious whole cotton is dead and cannot be saved.
Increased fertilizer inputs, cotton this is a supplement nutrients, improve soil for fertilizer capacity, improve the nutritional status of cotton an effective stimulation, however, do not speak blind scientific fertilization, cotton is a man-made disasters, resulting in cotton production The reduction is caused by its own reasons. We should conscientiously sum up the lessons learned, scientifically grasp the cotton fertilization technology, and obtain the maximum cotton planting benefits with the least amount of investment.
First of all, it is necessary to apply fertilizer according to the fertilizer requirement of cotton. Cotton needs fertilizer generally less in the early stage, more stable in the medium term, and more in the later period. Therefore, cotton fertilization should be done to apply the base fertilizer, quick application of seedling fertilizer, stable application of bud fertilizer, application of flower bell fertilizer, general application of peach fertilizer.
Secondly, it is necessary to fertilize due to the cause of nature. For example, early-maturing varieties should be applied to peach fertilizer for preventing premature aging, and transgenic hybrid insect-resistant cotton should increase the amount of potassium fertilizer, not less than 60 kg per mu . Fertilizers with high fertility should be less fertilized, and those with poor soil fertility should be added with organic fertilizer. When the weather is dry, it is necessary to rob the fertilization, adjust the fertilizer with water, and pay attention to the fertilization after the rain.
Third, it is necessary to account for cost-effective fertilization. First, we must pay attention to the ratio of input and output. Take 600 kg of seed cotton per mu as an example. The input of fertilizer per mu should not exceed 300 yuan. The second is to apply deep fertilizer. The fertilizer should not be applied to the surface of the soil, so that it can be volatilized or lost. Applying before the rain, fertilization can not damage the root system; third, the application of fertilizer should be applied in several stages , the amount of one dose should not be too large, the prospect of controlled slow release fertilizer is good, and it can be gradually expanded on the basis of experiment and demonstration; fourth is fertilization It must be closely integrated with chemical regulation so that the limited fertilizer can be applied in a well-balanced manner, giving the cotton a stable and high-yield plant type.
Â
Glass Toughing,Glass tempering furnace,Glass Machine
SHENZHEN HUACAI GLASS MACHINERY CO.,LTD , http://www.hcglassmachinery.com