Planting method capable of synchronizing safe planting and straw removal and remediation

Abstract

The invention discloses a planting method capable of synchronizing safe planting and straw removal and remediation, and belongs to the field of planting and remediation of cadmium-contaminated rice soil. Calcium polypeptide is applied to cadmium-polluted rice soil to regulate and control rice plants not to generate yellow leaves and to be all dark green (which cannot be realized by the existing method), then the rice is planted in a super-dense manner, and the rice root system also reaches high density, so that the concentration of heavy metal cadmium ions absorbed by each rice plant is relatively reduced, and the rice yield is increased. Meanwhile, passivation competitive inhibition of calcium polypeptide is combined with resistance control, so that seeds are qualified, but straws still contain certain heavy metals; therefore, the purpose of removing and repairing cadmium-contaminated soil is achieved by collecting the straws and performing centralized treatment, namely, the planted seeds (edible parts) are qualified, and the yield of the cadmium-contaminated soil is improved. Synchronization of safe planting and straw removal remediation by using calcium polypeptide is realized,and a new remediation mode of cadmium-contaminated rice soil is established.

Description

technical field [0001] The invention belongs to the field of planting and restoration of cadmium-contaminated paddy soil, and the specific meaning is to apply calcium polypeptide to cadmium-contaminated paddy soil to regulate the rice without producing yellow leaves and turning them all green (which cannot be achieved by existing methods), so as to achieve ultra-dense Plant rice and make the rice root system reach a high density, so that the concentration of heavy metal cadmium ions absorbed by each rice plant is relatively reduced. At the same time, combined with the passivation of calcium polypeptide (chemical precipitation binding) and competitive inhibition (calcium ions) joint resistance control, Then the seeds are qualified, but the straw still contains certain heavy metals. The purpose of removing and repairing cadmium-contaminated soil is achieved by collecting the straw and concentrating treatment (mostly incineration), that is, the planted seeds (edible parts) are qua...

AI Technical Summary

Problems solved by technology

The chemical treatment method is to put improvers and inhibitors into the polluted soil, increase the soil organic matter, change the physical and chemical properties such as pH, Eh and electrical conductivity, the advantages of the chemical treatment method are short cycle and obvious effect, but the cadmium is easy to reactivate; the agricultural treatment method It is to plant plants that do not absorb cadmium in polluted soil so that cadmium does not enter the food chain. The advantages of this method are easy operation and low cost, but the disadvantage is that the cycle is long and the effect is not significant. Although the effect of engineering treatment is thorough and stable, the implementation is complicated and difficult. Disadvantages such as high cost of treatment and easy reduction of soil fertility; biological treatment has shortcomings such as cadmium is easy to re-enter the soil and the effect is unstable

[0005] The continuous appearance of "cadmium rice" indicates the particularity of the properties of paddy soil and the severity of pollution, and also shows the complexity and difficulty of cadmium-contaminated paddy soil treatment technology. The current related treatment technologies have achieved certain results, such as chemical in situ passivation, organic fertilizer redox, competitive inhibition of calcium ions and other technologies, but there is a technical defect---heavy metal spacers still exist in the soil, and "cadmium rice" will be produced again at any time. Therefore, the above technologies can only be regarded as a In response to this situation, relevant experts proposed straw restoration technology, but how to implement it has not yet been determined. Based on this situation, this invention is based on the inventor's previous patent technology (201210190271.9) --- will be high in protein and can be used as high-quality organic fertilizer The combination of high-quality plant cakes and quicklime with calcium ions is forced to resolve at high temperature into a fully water-soluble protein polypeptide with high calcium ion activity - calcium polypeptide. Combined with a lot of research work, it is expected that calcium polypeptide has organic fertilizer characteristics (protein Nitrogen), the characteristics of chemical passivators (free sulfhydryl, carboxyl groups), competitive inhibition characteristics (effective calcium ions), explore the combination of passivation and competitive inhibition → high-density rice planting → safe seeds → cadmium The model of straw removal and restoration achieves the synchronization of safe planting and removal and restoration, and forms a new technology for the treatment of cadmium-contaminated paddy soil

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