Botany method for efficiently improving saline-alkali soil

Abstract

The invention discloses a botany method for efficiently improving saline-alkali soil. The method comprises the following steps: (1) turning over the land, harrowing, laser-levelling, salt-leaching, and seeding in spring; (2) irrigating after 10-15 days of the seeding, from the end of the Chinese wildrye trefoil stage to the beginning of overwintering, determining whether to irrigate according to the practical situation; (3) from the next year after the seeding, performing the following operations every year: applying one time of a humic acid combined fertilizer every twenty days after the Chinese wildrye turns green, and immediately performing one time of the irrigation after applying the fertilizer; applying a nitrogenous fertilizer after harvesting a batch of the Chinese wildrye, and immediately irrigating; and from the green-turning of the Chinese wildrye to the beginning of overwintering, determining whether to irrigate according to the practical situation. The method for improving the saline-alkali soil by using the Chinese wildrye of China sciences group No.1 is simple, easy, efficient and economized. The method is promoted in the large area of the similar saline-alkali soil in the north of China, the saline-alkali soil can be rapidly improved, the good steppe ecology environment is recovered, the ecological benefits can be realized, and the better economic benefit and the social benefit can be obtained.

Description

technical field

[0001] The invention belongs to the field of ecological environment management and restoration, and in particular relates to a botanical method for efficiently improving saline-alkali land. Background technique

[0002] According to incomplete statistics from UNESCO and FAO, my country's saline-alkali land area is 99.13 million hectares, accounting for 1 / 10 of the world's saline-alkali land. According to different soil types and climatic conditions, my country's saline-alkali land is divided into coastal saline areas, Huanghuai-Hai plain saline areas, desert and desert grassland saline areas, and grassland saline areas. The formation of saline-alkali land is the result of a combination of natural and human factors. High groundwater levels, salt in water, large surface evaporation, and unreasonable human use have resulted in the continuous expansion of saline-alkali land. The cultivated land area affected by saline-alkali in Xinjiang accounts for about 1 / 3 of...