Method and device for applying straws with different fragmentation degrees and decomposition degrees into saline-alkali soil in layered and ex-situ manner

Abstract

The invention discloses a method and device for applying straws with different fragmentation degrees and decomposition degrees into saline-alkali soil in a layered and ex-situ manner. The saline-alkali soil is divided into a plurality of soil layers, straws with different fragmentation degrees and decomposition degrees are applied to each soil layer, the decomposition degree of the straws applied to each soil layer is gradually reduced from top to bottom, and the fragmentation degree of the straws applied to each soil layer is gradually increased from top to bottom; the economic investment of the straws is small, and the effects of the straws in different forms are fully utilized to improve the soil texture of the saline-alkali soil and relieve further salinization of the saline-alkali soil; the device applied to the saline-alkali soil comprises a rack, a plurality of material storage boxes are installed at the upper end of the rack, and conveying mechanisms are installed at discharging openings in the bottoms of the material storage boxes; a plurality of subsoiling shovels which are in one-to-one correspondence with the conveying mechanisms are mounted on the rack from the front end to the tail end. By means of the device, the subsoiling shovels with different depths are arranged, the shovel tips of the different subsoiling shovels advance in the corresponding soil layers, the conveying mechanisms can convey straws with different fragmentation degrees and decomposition degrees in a storage box to the preset soil layers, and the straws can be applied to the four different soil layers at the same time.

Description

technical field

[0001] The invention relates to the technical field of saline-alkali land treatment, in particular to a method and a device for layering and ex-situ applying straws with different degrees of fragmentation and maturity to saline-alkali land. Background technique

[0002] At present, the traditional improvement methods for saline-alkali land mainly include:

[0003] 1. Physical improvement: mainly leveling the ground in saline-alkali land, deep plowing and drying, loosening the soil in time, raising the terrain, and improving the soil in micro-area, which can accelerate salt leaching, prevent salt return, enhance moisture conservation and drought resistance, and improve soil structure and nutrient status. However, this method has a large amount of engineering and high cost, and it takes a long time to achieve the purpose of reducing salt and changing alkali, and the effect is slow;

[0004] 2. Irrigation and salt washing: Use a large amount of fresh water to i...

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