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...