Method for applying fertilizer to wheat and corn crop rotation system in dry farming saline-alkali areas

Abstract

The invention relates to a method for applying fertilizer to a wheat and corn crop rotation system in dry farming saline-alkali areas and is used for improving fertilizer application benefit. The method comprises the following steps of: applying fertilizer to winter wheat, namely applying nitrogen fertilizer and phosphate fertilizer to the winter wheat according to the application amount of 6.9 to 8 kilograms of pure nitrogen (N) per acre and 5.5 to 12 kilograms of pure phosphorus pentoxide (P2O5) per acre respectively; and applying fertilizer to summer corns, namely applying nitrogen fertilizer and potassium fertilizer to the summer corns according to the application amount of 6.9 to 9 kilograms of pure N per acre and 6 to 9.5 kilograms of pure potassium oxide (K2O) per acre respectively. The method has the main advantages that: 1, fertilizer is applied according to different requirements of the winter wheat-summer corn on nutrients, so the fertilizer application pertinence is high and fertilizer application benefit is improved; 2, crops in each season are fertilized for one time, so labor of farmers and labor cost are reduced; 3, soil is prevented from being disturbed frequently, and water storage and soil moisture conservation are realized; and 4, the problems of volatilization loss in the fertilizer conversion process and pollution to atmospheric environment because the fertilizer is scattered on the ground surface are reduced.

Description

technical field [0001] The invention relates to an agricultural technology, in particular to a fertilization method for a wheat-corn rotation system in a dry saline-alkali area, and belongs to the field of agricultural technology. Background technique [0002] In areas where freshwater resources are scarce and salinized land is difficult to control, the benefits of fertilization are low, and the level of agricultural input and output is low. The soil is constrained by multiple factors of drought, thinness, salinity and secondary salinization, and the grain yield is low and unstable. In the low plains of North China around the Bohai Sea, the soil is generally deficient in nitrogen, phosphorus, and potassium. The planting system of winter wheat and summer corn is implemented twice a year. The growth period of winter wheat is from planting in early October of the current year to harvesting in early June of the following year, which lasts about 250 days. Especially the winter...

AI Technical Summary

Problems solved by technology

Second, the amount of fertilization is chaotic. Excessive fertilization or insufficient fertilization is common. Insufficient fertilization results in reduced production. Excessive fertilization not only wastes resources, but also increases the potential threat of secondary salinization

The third is that the method of fertilization is single. Most of the winter wheat-summer corn rotations use 1 base fertilizer plus 2-4 top dressings

Since the dryland areas are not irrigated, the fertilizers spread on the surface are easily volatilized and lost during the conversion process, which not only causes waste of resources, but also easily causes air pollution problems

Moreover, frequent fertilization operations are time-consuming, labor-intensive, and labor costs increase

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