The year is in spring. When the farmer waited for no time, it was time for the spring ploughing and fertilizer preparation. Many farmers and fertilizer marketers asked what characteristics of spring fertilizer this spring? To this end, Wang Xingren, a professor at China Agricultural University, suggested that the following measures be used to prepare fertilizer in spring:

As soon as possible, complete, right

“As early as possible” is to prepare the fertilizer as soon as possible. In the spring, the crops that need special attention are mainly: early spring crops such as spring wheat and potato in northern China; weak winter wheat that needs to be traced back to green fertilizer, and winter wheat, winter rape, citrus and other crops that need fertilization in early spring in the Yangtze River Basin; Greenhouse or greenhouse vegetables. Spring sowing crops should be combined with the application of base fertilizers, and it is required to prepare the farmer's fertilizer as soon as possible; if urea is used as the base fertilizer, it should be applied some days in advance so that it has a microbial transformation process in the soil. In short, the spring preparation of fertilizer should highlight a "early" word, can not "temporarily hold the Buddha's feet", should be prepared at least 15 to 20 days before the broadcast.

“Complete” refers to the variety of fertilizers needed in spring, including organic and chemical fertilizers, compound fertilizers and simple fertilizers. To combine local characteristics and needs, prepare all kinds of fertilizers needed. For example, spring crops must be combined with spring fertilizer before application of base fertilizer, generally need to apply compound fertilizer, or urea, phosphorus superphosphate, potassium chloride and other nitrogen, phosphorus, potassium fertilizers, and some need to apply the right amount Trace element fertilizers; organic fertilizers are recommended for field crops, must be applied to fruit trees and vegetables, and must be prepared in advance; greenhouse vegetables and fruit trees are different from field crops, even in spring top dressing, compound fertilizer or nitrogen and phosphorus should be applied. Potassium fertilizer is applied in combination.

The “match” is to use fertilizers that are suitable for the characteristics of the soil and crops in the fertilizer type and ratio. For rice, wheat, corn, cotton, rapeseed and other field crops, the total nitrogen demand per season is twice or more than that of phosphorus. Half of the nitrogen is used as the base fertilizer and the other half is the top dressing. Therefore, the base fertilizer of these crops should be The compound fertilizer with similar ratio of nitrogen and phosphorus should be used; if it is a one-time fertilization, such as the arid agricultural region in the northwest and the layered fertilization under the mechanized conditions in the northeast, a compound fertilizer with a nitrogen to phosphorus ratio of about 2:1 should be used. The amount of fertilizer applied is higher than that of the base fertilizer applied in divided fertilization. The ratio of potassium in compound fertilizer mainly depends on the area, in which the proportion of calcareous soil in the north is lower, and the proportion of acid soil in the south is higher.

What issues to pay attention to

Many farmers' friends mainly pay attention to the true and false fertilizers and price when purchasing fertilizers, and pay little attention to whether the compounding ratio of compound fertilizers is suitable for their own soil and crop characteristics. The base fertilizer should generally use a compound fertilizer with a nitrogen-phosphorus ratio of approximately 1:1. If it is a one-time fertilization, high-nitrogen compound fertilizer should be used, and the amount of fertilizer should be appropriately increased.

The current fertilizer market affects farmers to buy fertilizer

In the past year, affected by the weak domestic and international economic environment, coupled with overcapacity in China's fertilizer industry, demand for fertilizers has stabilized and declined, and prices have generally fallen. This provides a broader scope for fertilizer selection. However, due to the fierce competition among merchants, the fertilizer market is mixed, and it is even more difficult for farmers to buy genuine fertilizer products. Therefore, when purchasing compound fertilizers and various new types of fertilizers, it is recommended to look at the “three certificates”, namely the product registration certificate, production license, and product quality standard certificate. Since individual farmers do not have the conditions to test the quality of the fertilizer or whether it contains harmful substances, they should go to a trusted merchant to buy a well-known brand of products, and save all kinds of certificates for the purchase of fertilizer.

Fertilizer storage should be reasonable

The basic requirements for reasonable storage are to prevent loss of fertilizer nutrients, reduce moisture absorption and agglomeration of fertilizers, and prevent poisoning of humans and animals and fires. Do not stack ammonium fertilizer with seeds and microbial fertilizers to prevent the ammonia from damaging the seeds and active microorganisms. Especially for professional households, if the amount of fertilizer purchased is large, the fertilizer can be stored in a shelter sheltered from rain or ventilation, or temporarily placed in a place with high terrain, no water accumulation and fireproof conditions. Before stacking, put a reed or plastic cloth on the ground mat, and then put on a plastic cloth to prevent rain and snow from getting wet.

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