Method for reducing Cd content of watermelon fruit and soil Cd pollution simultaneously

Abstract

The invention discloses a method for reducing Cd content of a watermelon fruit and soil Cd pollution simultaneously, and belongs to the technical field of control over heavy metal content of the watermelon fruit and restoration of Cd polluted soil. According to the method, grafting is performed by adopting a common watermelon as a scion and a Chinese pumpkin as a stock with a grafting technique, awatermelon plant obtained by grafting has Cd enrichment capacity of Chinese pumpkin root system, transfer migration of Cd to leaves and the fruit is reduced, so that accumulation of Cd in the watermelon fruit is reduced, and the Cd content of soil is reduced. According to the grafting technique for grafting the Chinese pumpkin stock with the watermelon scion, the watermelon with the Cd content not exceeding the standard can be obtained with the grafting technique in the soil with moderate Cd pollution; meanwhile, the Cd content of soil is reduced by the Chinese pumpkin stock through absorption, so that the effect of restoring the Cd polluted soil is realized, and the economical and actual bio-restoration effect is realized.

Description

technical field [0001] The invention belongs to the technical field of controlling heavy metal content of watermelon fruit and repairing Cd-contaminated soil, in particular to a method for reducing Cd content in watermelon fruit and simultaneously reducing soil Cd pollution. Background technique [0002] Watermelon is an annual vine belonging to the Cucurbitaceae family, which originated in Africa. Watermelon is one of the top ten fruits in the world. It is widely planted in my country and has high economic added value. The annual planting area and output of watermelon in my country rank first in the world. Watermelon production is mainly based on cultivation methods such as winter and spring facilities. At present, developed countries such as Japan and South Korea have already adopted grafting technology on a large scale to overcome watermelon continuous cropping obstacles and low temperature stress, and the planting area of ​​grafted watermelon accounts for more than 90% ...

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Problems solved by technology

However, at present, the plants with high enrichment capacity are mainly weeds, flowers, trees, etc., and there are few methods to reduce the content of heavy metals in soil on the basis of ensuring agricultural safety production, which limits my country's food safety production and supply capacity to a certain extent.

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