After the Spring Festival, spring ploughing and fertilization with ammonium phosphate can play the role of “four or two poundsâ€. Low temperature in spring farmland, slow activation of phosphorus in soil nutrient pool, and crop seedling stage is in the critical period of phosphorus nutrition, sensitive to phosphorus, easy to lack phosphorus, and at this time, phosphorus deficiency, crop seedlings are not strong, and resistance is poor. . The farmer said: "There is money to buy seeds, no money to buy seedlings", and it is difficult to obtain high yields later.
The precise amount of ammonium phosphate is applied at the time of sowing, which is called fertilization or mouth fertilizer. There are two key technologies for applying fertilizer: one is to control the dosage at 5 kg/mu; the other is to apply the technique to apply 2 to 3 cm below the oblique angle of the seed. Do not allow the fertilizer to come into contact with the seed. Spring corn, soybeans and cotton in the spring crops in the north require the application of seed fertilizer.
The application of ammonium phosphate as the base fertilizer for spring crops ensures that the melons and fruits, the grain weight and the yield are guaranteed in the middle and late growth stages. For crop demand, phosphorus is an indispensable nutrient element for crops, so the demand for crops is large in the middle and late stages of growth. Due to the poor mobility of phosphorus in the soil, the absorption efficiency can be improved only by applying the distribution area of ​​the main roots of the crop. The depth of the bottom fertilizer of different crops should be different, especially the fruit trees are required to apply 40 to 60 cm, vegetables 20 cm, and food crops 20 to 30 cm.
Reasonable application of diammonium phosphate has two taboos: First, it should not be used as top dressing and applied to the surface; secondly, it should not be used as water for fertilizer, so that the precious phosphorus of Jingui is taken away from the ground runoff, and the root of the crop is fundamental. Not enough. In addition, an alternative to using low concentrations of phosphate fertilizer. The price of ammonium phosphate is relatively expensive, and farmers can also choose other cheap phosphate fertilizers.
In addition, the alternative phosphate fertilizer with the same type of calcium is also calcium magnesium phosphate fertilizer, which is a water-insoluble phosphate fertilizer, suitable for the slightly acidic and acidic soil in the central and southern parts of China, and can only be used as base fertilizer. Calcium, magnesium and phosphate fertilizers have the same characteristics as ordinary calcium. In addition to calcium and magnesium, they also contain silicon, which can enhance the robustness and disease resistance of rice straw.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Drawer Safe,Lock Safe,Anti Theft Safe,Portable Cash Safe Money Box
Ningbo Reliance Security Technology CO.,Ltd , https://www.reliancesafes.com