Special controlled-release fertilizer for sunflowers

Abstract

The invention relates to special controlled-release fertilizer for sunflowers. The special controlled-release fertilizer for sunflowers comprises nitrogen fertilizer, phosphorus fertilizer, potassiumfertilizer, sulfur fertilizer, iron fertilizer and zinc fertilizer; and the special controlled-release fertilizer for sunflowers comprises the following various effective chemical elements in percentage by weight based on pure nutrients: 26 to 28 percent of nitrogen, 10 to 12 percent of phosphorus pentoxide, 7 to 9 percent of potassium oxide, 0.2 to 2.0 percent of sulfur, 0.2 to 0.6 percent of iron, 0.2 to 0.7 percent of zinc, 0.5 to 1 percent of dicyandiamide and 6 to 9 percent of humic acid, wherein the nitrogen fertilizer comprises controlled-release nitrogen fertilizer, and the nitrogen content of the controlled-release nitrogen fertilizer is 28.6 to 34.6 percent of the total amount of the nitrogen in the nitrogen fertilizer. The fertilizer is reasonable in nutrient proportioning, meets the demand on nutrients by the sunflowers in the whole growth period, has high fertilizer utilization rate and saves input and labor cost of topdressing; meanwhile, a proper amount of iron fertilizer and zinc fertilizer are added, so that the content of the iron and the zinc in the sunflower seeds can be increased, and a foundation is laid for improving the quality of the sunflowers, enhancing the trace element nutrition and increasing the economic benefit.

Description

technical field [0001] The invention relates to a controlled-release fertilizer, in particular to a special controlled-release fertilizer for sunflowers suitable for simultaneous sowing of seed fertilizers. 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] Sunflower is one of the four major oil crops widely planted in the world. Over the years, sunflower hybrids have been welcomed by growers and oil processing enterprises because of their advantages such as neat and consistent plants, high yield, high oil, good comprehensive traits, and uniform grain quality, and have been widely used in many provinces, autonomous regions, and municipalities in my country. to plant. [0004] Reasonable fertilization can significantly increase grain yield and increase grain oil content, but if excessive fertilizer is applied, it ...

AI Technical Summary

Problems solved by technology

[0004] Reasonable fertilization can significantly increase grain yield and increase grain oil content, but if excessive fertilizer is applied, it will not only increase input costs and waste resources, but also pollute the environment due to ineffective absorption of nutrients

In recent years, in the process of planting sunflowers, farmers have been blindly applying fertilizers, and there are problems such as too little organic fertilizer application, insufficient nitrogen and phosphorus fertilizers, etc.

The method of fertilization by farmers is still the method of applying topdressing fertilizer at the bottom of the chemical fertilizer. There are some disadvantages in topdressing and fertilizing sunflowers. First, it will cause great damage to sunflower plants, which is not conducive to grain filling and grain weight increase; second, it is laborious and laborious, which increases cost input and farmers burden

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