Coast salinized soil improvement method improving plough layer soil nitrogen immobilization capability

Abstract

The invention discloses a coast salinized soil improvement method improving plough layer soil nitrogen immobilization capability; the method comprises the following steps: laying subsurface pipes, washing, ploughing soil, pre-applying soil composition conditioning agent, applying organic-inorganic composite fertilizer, supplementing bacterium source, and dry spreading a soil amendment in a fallow period. The coast salinized soil is large in salt content, high in soil hardening level, and severe in nitrogen nutrient loss in leaching; the novel method considers these problems, organically couples soil improving physical, chemical and biological means, thus developing the coast salinized soil improvement technology and application method thereof that improves salinized soil nitrogen immobilization capability and salinized soil physical and chemical properties; subsurface pipe drainage and organic-inorganic composite fertilizer are combined; soil composition conditioning agent and soil amendment are respectively applied before cultivation and in the fallow period; microbe inocula is supplemented after base fertilizer and additional fertilizer, thus greatly improving plough layer salinized soil nitrogen immobilization capability, and improving salinized soil physical and chemical properties.

Description

technical field [0001] The invention relates to a coastal saline soil improvement method for improving the nitrogen fixation capacity of plow layer soil, and belongs to the field of agricultural water and soil engineering. Background technique [0002] Due to urban expansion, cultivated land resources are shrinking day by day, and the potential of urban wasteland suitable for agriculture is relatively small. Using coastal soil and using it for crop cultivation will help to solve the problem of increasingly scarce arable land resources. However, due to the high salt content and poor physical and chemical properties of coastal saline soil, crops need to be improved before they can be cultivated. At present, there are many methods for saline soil improvement, but all of them have limitations to varying degrees. Such as the guest soil method, the effect is immediate, but the symptoms are not a cure, and the application effect in the improvement of large-scale coastal saline so...

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Problems solved by technology

Such as the guest soil method, the effect is immediate, but the symptoms are not a cure, and the application effect in the improvement of large-scale coastal saline soil is limited by the cost; the large water leaching method can effectively suppress the salinity of the plow layer soil, but it only leaches the salt Washing to a deeper level of soil, strong evaporation conditions will easily lead to soil return to salt; direct use of the underground pipe drainage method can fundamentally remove the soluble salt in the soil, but it will easily cause the loss of soil nutrients (N, P, K) in the plow layer; The mulching method can physically limit water and bring salt to the plow layer soil, but it can only delay the occurrence of salinization; bio-organic fertilizers have a significant effect in alleviating soil salinization, can reduce the salinity of the plow layer soil, and improve soil quality. Permeability, reducing soil bulk density, and balancing soil microbial flora, but its effect is slow, and the research on supporting technologies is still very scarce, which limits the promotion and application of related results

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