Technique for soil reclamation by digging channel on saline-alkali soil, covering membrane and drop irrigation

Abstract

The invention relates to a technique for soil reclamation by combining the techniques of digging a channel on saline-alkali soil, covering a membrane and drop irrigation by using the salt and water transportation principle of 'salt comes with water and goes with water'. Based on the traditional drop irrigation technique, a channel is dug under the membrane before seeding. After seeding, the soil under the membrane is about 10 to 20 cm lower than the bare soil between two membranes, the crop row spacing is 8 to 15 cm, the line spacing is 30 to 60 cm, and the width of the bare area between the two membranes is 30 to 60 cm. The technique can be widely applied to improving soil and has the advantages of soil moisture conservation, drought resisting propriety, soil improvement, temperature preservation, fertile maintenance, low cost, high salt rejection rate, and the like.

Description

Technical field: [0001] The invention relates to a soil improvement technology in the field of agricultural water and soil engineering, in particular to a soil ditching and film-covering drip irrigation improvement technology for saline-alkali soil in agricultural planting. Background technique: [0002] The improvement technology of heavily saline-alkali land is a technology that has received much attention in the arid regions of northern my country for wasteland reclamation and transformation of low- and medium-yield fields. Due to the sparse rainfall and strong evaporation in the arid regions of northern my country (Xinjiang, Gansu, Ningxia, Shaanxi, Shanxi, Inner Mongolia, etc.), and the existence of large areas of saline-alkali land, the technology of treatment of saline-alkali land is related to national food security and sustainable development of agriculture. [0003] At present, the improvement of saline-alkali land mainly includes chemical improvement, biological i...

AI Technical Summary

Problems solved by technology

[0004] The main principle of chemical improvement is to neutralize harmful salt particles in the soil by using chemical agents (Yanjianfeng, Kangdibao, etc.). Staying in the experimental stage, it is more difficult to promote and apply on a large scale

[0005] Biological improvement refers to the use of alkali-resistant crops (clover, oil sunflower, red willow, etc.) to control raw saline-alkali land or secondary saline-alkali land. However, alkali-resistant crops generally have low economic benefits and cannot be planted on a large scale. It is difficult to guarantee agricultural income. suppressed

[0006] Water conservancy improvement technology is to increase irrigation quota (120m 3 / mu) for flood irrigation, melt the salt in water, and wash it below the plow layer; this method can solve the saline-alkali problem better, but the water consumption is too large, it is difficult to have sufficient water source, and at the same time, the groundwater level will rise. Cause secondary salinization and bring new hazards

[0007] Farming technology improvement Use new mechanical equipment to crush farmland straw, cover the soil surface, and perform deep plowing to bury the straw underground to increase the organic matter content and microbial activity of the soil. The disadvantage of this technology is that the straw is not crushed enough, which will affect the next year Cultivation (mulching, sowing), there is no straw available for raw barren saline-alkali land

Images