Straw utilization method capable of relieving soil salinization

Abstract

The invention discloses a straw utilization method capable of relieving soil salinization in the technical field of agricultural (vegetable) cultivation. The method is characterized by comprising thefollowing steps: as for a greenhouse with soil salinization due to excessive application of N fertilizer, upright growth type hygrophilous crops suitable for surface soil sufficient wet cultivation are planted in the greenhouse; herbal crop straw with high carbon content are selected and the straw is spread in bed furrows; bed surfaces are fully wet by furrow irrigation or spraying, and water is held in the bed furrows in a short time; straw in the bed furrows is stepped during agricultural operation such as fertilization, pesticide spraying and harvesting; when the straw in the bed furrows iscompletely decomposed and time permits, if porphyridium or green moss still exist on soil surfaces of the bed furrows, straw is added continuously to the bed furrows; if porphyridium or green moss isnot discovered in the bed furrows, the soil salinization is indicated to be relieved. Extra NO3<-> ions in soil can be consumed and decomposed and soil salinization can be relieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural (vegetable) cultivation, and in particular relates to a straw utilization method for alleviating soil salinization. Background technique [0002] At present, the obstacle of continuous cropping of facility vegetables has become the bottleneck problem of high-quality and safe production of vegetables, and soil salinization is one of the main factors of continuous cropping obstacles. Excessive fertilization, high multiple cropping index and heavy cropping in the production process are important reasons for soil salinization. Compared with other fertilizers, N fertilizer is the most widely used and concentrated fertilizer in facility agricultural production. According to the principle of "salt goes with water", in the case of planting conventional xeric vegetables, NO 3 - The ion-dominated soil salinity mainly accumulates in the topsoil, NO 3 - The ions are easily soluble in water. After ir...

AI Technical Summary

Problems solved by technology

This method can reduce the secondary salinization of soil, but its disadvantage is that it needs to cut the straw into sections, crush it, mix it with the soil by plowing, and bury it deeply. The steps are complicated and the operation cost is high.

This method can quickly degrade soil salinity and change the content of various ions in the soil, but its disadvantages are: the steps of mixing straw with fertilizer or chitosan solution are cumbersome and costly

[0007] The technology of covering rice and wheat straw on the shallow water field soil surface in the facility, combined with the ecological mode of water and dry rotation of facility vegetables to prevent and control continuous cropping obstacles, covers the soil surface of rice and wheat straw between rows of aquatic vegetables in the facility to maintain a water layer of about 5cm, which can not only drown and kill xerophytes Plant diseases, insect pests and weeds can reduce the base number of vegetables, and can use the nutrients released by straw decomposition to improve the yield and quality of aquatic vegetables in the current season, or partially replace chemical fertilizers. Soil properties (Yan Wuwei, 2017), but need to maintain a shallow water layer, it is difficult to apply in areas with poor water resources