Method for planting alfalfa in moderately severe alkaline sulfuric acid saline soil on large scale

Abstract

The invention discloses a method for planting alfalfa in a moderately severe alkaline sulfuric acid saline soil on a large scale. The method comprises the steps as follows: (1), broadcasting fully rotten a farming manure, diammonium phosphate, potassium sulfate and industrial coal ash on the surface of the moderately severe alkaline sulfuric acid saline soil, and uniformly spraying coal-washing wastewater; (2), ploughing, leveling and irrigating the moderately severe alkaline sulfuric acid saline soil; (3), selecting alfalfa seeds of a salt-tolerant and drought-resistant variety, and soaking the seeds by using ABT rooting powder; (4), covering the soaked alfalfa seeds with bactericides with alfalfa root nodule bacteria; (5), coating the alfalfa seeds covered with the bactericides; (6), sowing the coated alfalfa seeds into the moderately severe alkaline sulfuric acid saline soil; and (7), after seedling emergence, carrying out field management. The method can be used for planting the alfalfa in the moderately severe alkaline sulfuric acid saline soil on a large scale, and has the characteristics of high seedling emergence speed, high seedling percentage, simplicity for operation, suitability for mechanical operation, easiness in manual control and the like.

Description

technical field [0001] The invention relates to the technical field of grass planting on saline-alkali land, in particular to a large-scale planting method of alfalfa in medium-severe alkaline sulfate saline soil. Background technique [0002] Saline soil is a general term for various types of saline soil, alkaline soil and other salinized and alkalized soils in different degrees. It is formed under certain natural or artificial conditions. The essence of its formation is mainly various soluble salts. Redistribute horizontally and vertically on the ground. In arid and semi-arid areas, the salt contained in the subsoil and groundwater rises to the surface layer with the water through soil capillary action due to ground evaporation. After the water evaporates, the salt remains on the soil surface and accumulates to form saline land. The accumulation of salt not only leads to the imbalance of soil nutrients, but also reduces the soil permeability, causing the growth of most pl...

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Problems solved by technology

[0008] Patent Document 1 (CN 101904265B) discloses a method for cultivating alfalfa in light saline-alkali cultivated land to solve the problems of low seedling emergence rate and low yield when the existing alfalfa planting method is used in saline-alkali land, but this method is difficult to apply to Large-scale planting of alfalfa in medium-

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