Method for recovering Puccinellia distans and Puccinellia tenuiflora in saline and alkaline land

Abstract

The invention relates to a method for recovering Puccinellia distans and Puccinellia tenuiflora in a saline and alkaline land. The invention can solve the technical problem that in the conventional saline and alkaline land transplanting method, continuous irrigation management is performed in a later stage, and large-area promotion and application of species is restricted. The method includes: 1, using a plough to dig furrows; 2, putting aeolian sandy soil to the furrows; 3, using a sowing machine to put Puccinellia distans seeds or Puccinellia tenuiflora seeds in the aeolian sandy soil; and 4, using a land roller to compact the aeolian sandy soil. The method is low in cost, is easy to promote, and has later economic benefits. The method can be used for recovering the Puccinellia distans and the Puccinellia tenuiflora in saline and alkaline lands.

Description

technical field [0001] The invention relates to a method for recovering S. chinensis and S. chinensis in saline-alkali land. Background technique [0002] Foreign research status: Soil salinization is a worldwide problem (Szabolcs 1989). Since the beginning of the 20th century, the restoration and management of salinized land has a history of more than 100 years (Qadir et al. 2001). International research on saline-alkali land treatment mainly focuses on farmland soil. In terms of treatment technology, on the one hand, based on the laws of water and salt migration in saline-alkali soil, physical methods are adopted, such as turning rakes, covering straw, and setting ditches to build ridges, etc. to improve the surface structure. , improve water infiltration, reduce water evapotranspiration, block the rise of salinity, or directly dig trenches to drain and wash salt, so as to reduce the salinity of the topsoil and facilitate plant growth (Bakker et al.2010a,b); on the one han...

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Problems solved by technology

For example, considering that Songnen Grassland is located in the interlaced area of ​​agriculture and animal husbandry, and has rich straw resources, straw cuttings have been developed to improve degraded grasslands; mulching straws to improve the soil microenvironment, supplementing herbaceous plants such as star grass, wild barley and sansevieria to improve degraded grasslands; and By transplanting Leymus chinensis to restore degraded grassland, however, transplanting Leymus chinensis requires irrigation management in the later stage, which restricts the large-scale application of this technology

In recent years, the Northeast has also developed the technology of growing rice on saline-alkali land. However, the salinized land in the Northeast is in a semi-arid area, with an annual rainfall of only 300-400 mm, while the annual water consumption for planting rice has reached 1600 mm. It is sustainable to develop rice in saline-alkali land near the river. However, most of the saline-alkali land in Northeast China is far away from the river. Planting rice on a large scale in the saline-alkali land in this area will inevitably lead to an extreme drop in groundwater level and depletion of water resources, causing a series of ecological problems. question

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