Controlled-release fertilizer special for millet

Abstract

The invention relates to a controlled-release fertilizer special for millet. The controlled-release fertilizer comprises a nitrogen fertilizer, a phosphorous fertilizer, a potash fertilizer, a sulphurfertilizer, an iron fertilizer and a zinc fertilizer. According to the calculation of pure nutrients, various effective chemical elements in the controlled-release fertilizer special for the millet comprise, by weight, 18-20% of nitrogen, 9-11% of phosphorous pentoxide, 15-17% of potassium oxide, 1.4-2.8% of sulphur, 0.3-1.0% of iron, 0.3-1.1% of zinc, 0.5-1% of dicyandiamide and 7-9% of humic cacid, wherein the nitrogen fertilizer comprises a controlled-release nitrogen fertilizer, and the content of nitrogen in the controlled-release nitrogen fertilizer accounts for 40-50% of the total nitrogen content in the nitrogen fertilizer. The fertilizer is reasonable in nutrient ratio, the requirement of the millet for the nutrients in the whole growing stage is met, the fertilizer utilization rate is high, and the cost for topdressing and labor cost are reduced; meanwhile, an appropriate quantity of the iron fertilizer and the zinc fertilizer is added, the content of iron and zinc in grainsof the millet can be increased, and a basis is laid for improving the quality of the millet, enhancing micro-element nutrition and increasing economic benefits.

Description

technical field [0001] The invention relates to a controlled-release fertilizer, in particular to a special controlled-release fertilizer for millet suitable for simultaneous sowing of seed and fertilizer. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] Millet originated in China and has been cultivated for more than 8,700 years. It is one of the oldest cultivated crops in the world. my country's millet planting area is about 2 million hectares 2 , mainly concentrated in the arid and semi-arid regions of North China, Northeast China, and Northwest China. Millet has attracted more and more people's attention because of its rich nutrition, drought resistance, barren resistance, and wide adaptability. It is the main crop of the miscellaneous grains boom in recent years. [0004] In recent years, in the process ...

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Problems solved by technology

[0004] In recent years, in the process of millet planting, farmers basically rely on experience in fertilizer application, and there are many problems, such as unreasonable fertilization structure, improper fertilization methods, etc.

Farmers are more arbitrary in the selection of fertilizers, lack of scientific basis and theoretical guidance when fertilizing, and the efficiency of fertilizer utilization is low

For a long time, the traditional habit of partial application of nitrogen fertilizer and excessive application has resulted in excessive nitrogen absorption by millet, reduced disease resistance and lodging resistance, and poor quality

At the same time, excess nitrogen volatilizes in the form of ammonia or nitrate nitrogen or seeps into the deep soil layer with water, polluting the environment, reducing the utilization rate, serious waste, and poor return on farming investment

Insufficient use of phosphorus and potassium fertilizers and micro-fertilizers leads to an imbalance of soil nutrition and crop deficiency, which also affects yield and quality

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