A method for reseeding alfalfa in degraded Leymus chinensis

Abstract

The invention discloses a method for reseeding alfalfa in degenerated leymus chinensis pasture. The method comprises the following steps: reseeding alfalfa into natural pasture, and performing fertilization and pasture management of clipping at regular time, so as to maintain the ratio of the alfalfa in the natural pasture. Tests show that the pasture reseeding technique is simple to operate, and materials for reseeding, fertilizers and the like are wide in source, simple in production cost, low in cost and applicable to large-scale popularization. By adopting the reseeding technique disclosed by the invention, not only are productivity and forage grass quality of the degenerated leymus chinensis pasture improved, but also the nutrients of nitrogen in pasture soil are increased, utilization and circulation of the nitrogen in a pasture ecological system are promoted, diversity and stability of a pasture system are maintained, and technical supports are provided to establish high-yield stable natural pasture. The method has very high economic and ecological values, relatively high practicability and generalizability, and very wide application prospects.

Description

technical field [0001] The invention belongs to the field of ecological environment management and restoration, and in particular relates to a method for re-seeding alfalfa on degraded chinensis meadows. Background technique [0002] Grassland ecosystem is the type of ecosystem with the largest land area in my country, accounting for 40.7% of the country's land area, about 400 million hectares. In recent years, due to unreasonable grazing system, blind reclamation, excessive firewood harvesting and other human reasons, as well as natural factors brought about by climate change, 90% of the grassland area in my country has been degraded to varying degrees, mainly in Declining grassland productivity, loss of biodiversity, and intensified soil erosion severely restrict the functionality and stability of grassland ecosystems. Therefore, it has become a very urgent task to restore and rebuild the grassland ecosystem reasonably and effectively. [0003] Grassland reseeding is an i...

AI Technical Summary

Problems solved by technology

From 1960 to 2000, the amount of nitrogen fertilizer applied in terrestrial ecosystems increased by 8 times, but less than 40% of the nitrogen fertilizer was absorbed and assimilated by plants. The low nitrogen use efficiency not only caused economic waste, but also caused great Disturbs ecosystem nitrogen cycling, an important driver of biodiversity loss

However, most of the domestic research on Medicago sativa focuses on the cultivation and domestication of seed resources, and there are few reports on the effect of reseeding Medicago sativa

Foreign studies on alfalfa re-seeding report that alfalfa has weak adaptability after re-seeding and is inhibited by the competition of grassland native vegetation. It is excluded by the competition of native vegetation in two years and cannot be maintained in the natural grassland for a long time

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