Soil conditioner for promoting water and fertilizer retention of aeolian sandy soil and using method of soil conditioner

Abstract

The invention discloses a soil conditioner for promoting water and fertilizer retention of aeolian sandy soil and a using method of the soil conditioner. The soil conditioner comprises the following substances: 1.5 kg of biochar and 5 kg of bentonite contained in every 1 t of aeolian sandy soil. The using method comprises the following processes: mixing biochar, bentonite and aeolian sandy soil according to a proportioning ratio; uniformly applying the mixture to the lower part of a soil plough layer; covering with natural sandy soil, adding a small amount of organic fertilizer, fully mixing the organic fertilizer with plough layer soil through a rotary cultivator, and adjusting the irrigation amount according to the soil ridge condition, and keeping the water content of the soil at 70%-80% of the field water-holding capacity, so as to being beneficial to diffusion of charcoal and bentonite to the plough layer of aeolian sandy soil, and changing the texture and structure of the aeoliansandy soil. The soil conditioner can adjust the texture and structure of the aeolian sandy soil for a long time, improve the mechanical composition of the soil, increase the content of soil aggregates, reduce the leaching loss of nutrient substances, reduce the water and soil loss amount and improve the water and fertilizer retention capacity of the soil, thereby reducing the use amount of a fertilizer, improving the utilization rate of the fertilizer and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of wind-sand soil improvement, and in particular relates to a soil improver for promoting the water and fertilizer retention of wind-sand soil and its application method. Background technique [0002] Land is the space for human survival and development. Since modern times, with the rapid development of economy, there are more and more extreme environments in the world, and natural disasters occur frequently. Soil degradation and desertification in countries around the world are becoming more and more serious. Grasslands are gradually swallowed up, traffic roads are buried by wind and sand, and water conservancy projects and river courses are filled with sand, which seriously hinders regional economic development. Land desertification also has a serious impact on the balance of the ecological environment, affecting soil respiration, leading to regional pollution, and causing serious harm to human production ...

AI Technical Summary

Problems solved by technology

However, due to the single soil structure of wind-blown sand soil, poor mechanical composition, low proportion of large aggregates, poor soil stability, adsorption capacity and slow-release capacity, leakage of water and fertilizer, resulting in low natural fertility

If it is directly reclaimed as arable land, it will easily cause the rapid loss of nutrients in the fertilizer and cannot be absorbed and utilized by crops. Excessive application of fertilizer will not only increase the production cost, but also cause serious damage to the surrounding water body and even the entire ecological restoration.

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