Method for cultivating semi-artificial gramineous-legumina hybrid grassland on salinization grassland

Abstract

The invention belongs to a method for establishing and planting a semi-artificial grassland, and in particular relates to a method for introducing leguminous pasture into a saline-alkali grassland in the north to establish and plant a semi-artificial grassland. The use of leguminous forages to improve natural grasslands in semi-arid areas, especially the mixed sowing of grass and beans, is to select suitable farming methods for special soil conditions and succession rules, based on the characteristics of saline-alkali-tolerant legume forage seeds, seasonal distribution of rainfall, and soil conditions. The dynamic changes of water and salt and the growth period of seedlings select the appropriate sowing time, and take appropriate management measures to weaken interspecific competition, increase the area of ​​assimilative organs, and promote the rapid and successful settlement of leguminous forage seedlings. The method has the advantages of increasing seedling emergence rate, settlement rate and regreening rate, good seedling growth index, low cost, short planting period, easy popularization and the like.

Description

technical field [0001] The invention belongs to a method for establishing and planting a semi-artificial grassland, and in particular relates to a method for introducing leguminous pasture into a saline-alkali grassland in the north to establish and plant a semi-artificial grassland. Background technique [0002] In natural grassland ecosystems, nitrogen deficiency is the main factor limiting plant growth. Leguminous pasture fixes nitrogen in the atmosphere through its symbiotic rhizobia and converts it into nitrogen nutrients that can be absorbed and utilized by other grassland plants. It is equivalent to a natural "nitrogen fertilizer factory" in the grassland ecosystem. At the same time, leguminous forage itself is a high-protein forage, which increases the protein content of the entire pasture. Leguminous forages play a very important role in improving nitrogen balance in grassland ecosystems and promoting grassland livestock production. [0003] In general, the richne...

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Problems solved by technology

First of all, the no-tillage method usually used to improve natural grassland is not suitable for the northern grassland soil with high compactness and large volume, and the concentrated rainfall in the rainy season hinders the implementation of soil tillage; secondly, the higher soil salinity and pH value make Leguminous herbages are under great survival threat during the fragile seedling period; thirdly, the seasonal pattern of water resource supply can only limit the growth of seedlings in the short rainy season, and this is the period when weeds are abundant and the pressure of survival competition is high ;Finally, the long severe winter and the spring cold and spring drought after turning green are severe challenges to test the nutrient storage capacity of seedlings. These biotic and abiotic factors all have a considerable negative impact on the settlement of leguminous forages

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