Cultivation method for intercropping ciliate desert-grass and corn through recycling

Abstract

The invention discloses a cultivation method for intercropping ciliate desert-grass and corn through recycling. By utilizing the characteristics of low accumulation of heavy metal arsenic in corn grains and high enrichment of heavy metal arsenic by perennial plants ciliate desert-grass, intercropping is conducted in cultivated land heavily polluted by heavy metal arsenic; the method comprises thefollowing specific steps of deep scarification of soil, ditching for application of corn base fertilizer, plant-shrinkage, closely-planting and optimized sowing of corn, intensive cultivation in a corn vegetative period, seedling-staggered method transplanting of the ciliate desert-grass, precise management of a ciliate desert-grass field, stubble-remaining cutting of the ciliate desert-grass andcoverage of corn straw, and circular planting of the corn and sustainable utilization of the ciliate desert-grass. Compared with a traditional habitual planting mode, the method has the advantages that through the specific steps, the yield of the corn grains can be significantly increased, the green-turning survival rate and biological yield of the ciliate desert-grass are significantly increased,and the absorption and treatment effect on heavy metal arsenic in the soil is significantly improved.

Description

technical field [0001] The invention relates to the technical field of agronomy for controlling farmland soil pollution, in particular to a cultivation method for interplanting corn with recyclable centipede grass. Background technique [0002] Corn is one of the most important food crops in my country, and has an important strategic position in ensuring national food security and sustainable economic development. Among them, Yunnan Province, which is located in the corn-growing belt in southwestern my country, has a stable corn planting area of ​​more than 1.3 million hectares per year, which plays an important role in supporting the development of local animal husbandry and stabilizing the source of income of ethnic minorities in the frontier. At present, with the advancement of corn technology and the continuous increase in production, people pay more and more attention to quality and safety, which requires fundamental attention to food safety. [0003] Due to its unique...

AI Technical Summary

Problems solved by technology

The existing commonly used soil arsenic pollution control methods and their disadvantages are as follows: 1. Engineering measures method: directly replace polluted soil with clean soil, but the amount of work is large, the investment cost is high, and the soil structure is destroyed, resulting in a decrease in fertility; 2. Stability Solidification method: Stir chemical agents into polluted soil to directly wrap heavy metals in crystals, which can make the elimination period of heavy metals long, but the scope of action is narrow and the cost is high; 3. Physical and chemical restoration methods: use soil leaching and vitrification methods or electrochemical methods, but these methods often affect the content of other components in the soil, resulting in a decline in soil fertility; 4. Phytoremediation: plant a large number of plants that can enrich heavy metal arsenic in contaminated soil for absorption treatment, but In this way, the utilization rate of the soil is low, which affects the grain production, and it takes a long time to plant and repair the plants repeatedly, and the engineering volume is large.

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