Set fertilizer suitable for simplified and reduced fertilizer application of direct-sowing cotton and fertilizer application method

Abstract

The invention discloses a set fertilizer suitable for simplified and reduced fertilizer application of direct-sowing cotton and a fertilizer application method. The set fertilizer comprises a base fertilizer for one-time seed and fertilizer simultaneous sowing, a water-soluble fertilizer subjected to foliage spraying in the seedling bud stage-initial flowering stage and a water-soluble fertilizer subjected to foliage spraying in the flowering and boll-forming stage. Effective elements and pure nutrients of the base fertilizer for one-time seed and fertilizer simultaneous sowing comprise, by weight, 15-25% of N, 5-10% of P2O5, 15-25% of K2O and 3-5% of S. According to the formula of the water-soluble fertilizer subjected to foliage spraying in the seedling bud stage-initial flowering stage, the sum of concentrations of B and Zn is larger than or equal to 100 g / L, the ratio of the concentration of B to the concentration of Zn is 1:(1-2), amino acid is larger than or equal to 20 g / L, and amino-oligosaccharin is larger than or equal to 5 g / L. According to the formula of the water-soluble fertilizer subjected to foliage spraying in the flowering and boll-forming stage, the concentration of humic acid is larger than or equal to 30 g / L, the concentration of amino-oligosaccharin is larger than or equal to 5 g / L, the sum of concentration of N, P2O5 and K2O is larger than or equal to 200 g / L, and the ratio of the concentration of N to the concentration of P2O5 to the concentration of K2O is 2:1:2. By means of the set fertilizer, the requirement of cotton for nutrients in the whole growth and development stage can be effectively met, and the set fertilizer also has the functions of preventing diseases, preventing shedding of cotton buds and bolls, preventing boll rotting, resisting high temperature and the like; the fertilizer application procedure is simplified, the use amount of the chemical fertilizer is reduced, the utilization rate of the fertilizer is increased, and the fertilizer application benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a set fertilizer and a fertilization method suitable for simplified and reduced fertilization of direct-seeded cotton. Background technique [0002] Cotton is one of the main economic crops in my country, and its output accounts for 20-35% of the world's total output. Cotton has biological learning characteristics such as long growth period, unlimited growth, long overlapping time of vegetative growth and reproductive growth, which makes cotton fertilization technology more complicated, and the contribution rate of fertilization technology to yield is large. The conventional method of fertilizing cotton in the Yangtze River Basin cotton area and the Yellow River Basin cotton area includes 3-5 times of base fertilizer, seedling fertilizer, bud fertilizer, flower boll fertilizer and capping fertilizer. Conventional fertilizers and conventional fertilization techniq...

AI Technical Summary

Problems solved by technology

Conventional fertilizers and conventional fertilization techniques for cotton production have the following problems: First, there are many times of fertilization, a lot of work, complex fertilization procedures, inconvenient field operations, and it is difficult to meet the needs of light and simplified mechanized cultivation; 1. Unreasonable fertilization methods and periods, low fertilizer efficiency, and heavy non-point source pollution; 3. In conventional technology, there are a large number of fertilization periods overlapping with high-incidence periods of drought, rain and waterlogging, which leads to the inability to topdress or fertilizer damage and reduce production.

However, in the existing studies, most of the foliar fertilizers used are conventional water-soluble fertilizers, and no matching foliar water-soluble fertilizers have been provided based on the performance of the one-time basal application of slow-release fertilizers for cotton and the growth and development of cotton. Simplified fertilization package fertilizer for direct seeding cotton