A high-nitrogen high-sulfur slow release fertilizer for saline-alkali land and applications thereof in plantation of pyrus betulifolia

Abstract

A high-nitrogen high-sulfur slow release fertilizer for saline-alkali land is provided. The slow release fertilizer comprises following components by mass: 30-35 parts of maleic anhydride, 11-14 parts of tetronic acid, 30-35 parts of urea, 13-15 parts of biochemical fulvic acid, 7-10 parts of humic acid, 1-2 parts of chelated zinc, 2-3 parts of chelated copper, 15-17 parts of ammonium sulfate and 1.2-1.5 parts of a capsule wall material. Applications of the slow release fertilizer in plantation of pyrus betulifolia are also provided. The beneficial effects of the slow release fertilizer and the applications are that the fertilizer efficiency of the slow release fertilizer is prolonged by 35-40 days, the pH of the soil is reduced to 7.8-8.0, the degree of alkalization of the soil is reduced to 12.1-12.8%, permeable porosity of the soil is increased to 13-17%, the soil bulk density is reduced to 0.90-0.96 g / cm<3>, the slow release fertilizer is used for plantation of the pyrus betulifolia, the survival rate of transplanting of the pyrus betulifolia is 94.5-97.6%, and medicinal value is improved.

Description

technical field [0001] The invention provides a fertilizer and its application in the planting of pears, in particular to a high-nitrogen-sulfur slow-release fertilizer in saline-alkali land and its application in the planting of pears, belonging to the technical field of soil fertilizers. Background technique [0002] Nitrogen fertilizers and sulfur fertilizers are easily lost after being applied to the soil. The loss methods include leaching, gas loss and fixation, and a large amount of loss. China loses 12-14 million tons of nitrogen fertilizer through leaching and volatilization every year, and the utilization rate of nitrogen fertilizer is only about 30%, resulting in huge waste. Sulfur fertilizer can also be lost through leaching and runoff in the soil. The loss of fertilizer not only causes waste, but also seriously pollutes the environment, reduces the quality of agricultural products, and improves the utilization rate of fertilizers, which has become a key issue of ...

AI Technical Summary

Problems solved by technology

[0004] However, the main problems in the production of slow-release fertilizers in the prior art are high cost, large investment in equipment, added materials are not easy to degrade in the soil and cause pollution, and there are environmental risks.

[0005] The existing slow-release fertilizers also have the following shortcomings in improving soil: (1) the release time in the soil is short; (2) the effect of reducing soil pH and alkalization is not good; (3) the improved soil has air-permeable pores It is still low, and the soil bulk density is high; (4) After the improvement of the soil, the plants are planted, the transplanting survival rate is low, and the fruit quality is not good

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