Quick regenerating method for vegetation of returning farmland to grassland zone in extremely cold areas

Abstract

The invention relates to a quick regenerating method for vegetation of returning farmland to grassland zone in extremely cold areas, which comprises the following steps of: (1) mixing and seeding annual pasture oat and perennial pasture on the farmland returning to grassland zone, and building an artificial pasture integrating mowing and grass seed harvesting functions; (2) ploughing and raking the artificial pasture; (3) sowing the seeds and applying base fertilizer; and (4) mowing the oat forage grass in the first year and harvesting the grass seeds and mowing the perennial pasture in the second year or later after covering and compacting the grass seeds in the step (3). The method utilizes the annual oat and perennial pasture to form different biotypes of pasture mixing and seeding community, so that the weed spreading can be obviously suppressed, the soil humidity and air humidity are obviously improved, the evaporation capacity and water loss and soil erosion intensity are reduced, therefore, the soil exposure time is short after regeneration of the grassland zone, the vegetation covering is quick, the water retention and preservation of soil moisture effect is obvious, and the ecological and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of restoration of grassland ecological-production functions, in particular to a method for quickly renewing grassland vegetation in alpine regions. Background technique [0002] Returning farmland to forests and grasslands is an important measure to improve the ecological environment in the western region. Returning farmland to grassland is of great significance for strengthening ecological environment governance, implementing sustainable development strategies, adjusting agricultural structure, and realizing forage industrialization. The model of returning farmland to grassland generally includes three systems: natural restoration of returned farmland, artificial restoration (establishment of artificial forage base) and grassland rotation technology (Han Jianguo 2004). Han Yongwei et al. (2005) pointed out that the technical measures for returning farmland to grassland in the transition zone of agriculture...

AI Technical Summary

Problems solved by technology

[0005] In the existing technologies and backgrounds of vegetation regeneration mentioned above, there is a key problem that has not been overcome, that is, in the first year of restoration and regeneration of the grass belt, because the planted perennial grass can only reach the growth and development stage of grass tillering before the cold season, In the first year, the vegetation coverage is low, the surface is exposed seriously, the ability of moisture conservation and soil and water conservation is low, the yield of pasture is very low, and there is basically no income, and the benefits of rapid renewal of grass belts are greatly reduced.