Maize is a high-yielding crop and requires a large amount of fertilizer. Scientific fertilization is the key to obtaining high and stable yield of corn. According to the law of demand of maize, it is necessary to determine a reasonable method of fertilization and determine the proportion of suitable fertilizer to achieve high-quality and high-yield corn, and achieve maximum economic benefits.
First, the application of basal fertilizer and fertilizer corn should be applied before the broadcast of basal fertilizer, mainly organic fertilizer, plus the use of the former buckwheat wheat straw directly to the field, but should be applied with appropriate amount of nitrogen fertilizer, adjust the carbon and nitrogen ratio, in order to accelerate the decomposition of straw . Fertilizers are mainly available nitrogen, phosphorus, and potassium fertilizers, such as diammonium phosphate (5-10 kg per 667 square meters), potassium sulfate summer combined fertilizer (4-15 kg per 667 square meters, 10-15 kg), etc. .
Second, the top dressing is a key fertilizer in the growth of corn has a pivotal role, top-dressing nitrogen mainly fast-acting, and according to different growth stages of corn with phosphorus, potassium fertilizer. Usually three times top dressing, namely Miao Fei, jointing fertilizer, ear bar. Summer corn in the jointing and booting phase of nitrogen, phosphorus and potassium are more demand, it should be based on the specific circumstances of the application of phosphorus and potassium fertilizer.
III. Clever use of foliar fertilizer spraying 0.2%-0.3% of potassium dihydrogen phosphate 2-3 times in the jointing stage of corn, which can increase corn production by more than 10%, spraying 0.1%-0.3% at the seedling stage and jointing stage. Zinc sulfate aqueous solution prevents corn white mosaic disease.
Fourth, pay attention to the application of special fertilizers Now the agricultural capital market, a variety of special fertilizer for the name in an endless stream, there are no lack of shoddy products, so be careful when buying fertilizer, fertilizer, according to the growth characteristics of corn and soil nutrient content fertilizer fertilizer.
1.Hawthorn extract
Hawthorn can enhance myocardial contractility, increase cardiac output, slow down heart rate, dilate coronary blood vessels, and has the effect of lowering blood pressure and blood fat.
2.Rhubarb extract
In addition to laxative and laxative effect, rhubarb also has the effect of lowering blood pressure and cholesterol.
3, wolfberry extract
Lycium barbarum can lower blood sugar, inhibit fat deposition in liver cells, promote liver cell newborn, and have antihypertensive effect.
4, Cordyceps extract
Cordyceps can improve the immune function of the body, strengthen the ability to remove viruses, protect liver cells and indirectly inhibit the occurrence and development of liver fibrosis.
5. Salvia miltiorrhiza extract
Salvia miltiorrhiza is used in more research on anti-hepatic fibrosis treatment. It can protect hepatocytes, reduce the stimulation of stellate cells by hepatocyte injury, necrosis, etc., and inhibit the initiation and development of hepatic fibrosis; the collagen content in the liver is significantly reduced, and the urinary HPP discharge is elevated, suggesting that the drug can promote the degradation of collagen that has been formed, and the proliferating collagen is reabsorbed by hydrolysis.
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