Method for reducing heavy metal absorption of crop foliage
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A technology for crops and heavy metals, applied in the fields of botany equipment and methods, agriculture, plant protection, etc., can solve the problems of absorbing heavy metal ions and high safety risks of agricultural products, and achieve the effect of reducing the concentration of heavy metals, reducing safety risks, and being easy to operate.
Inactive Publication Date: 2016-07-27
SOUTHWEAT UNIV OF SCI & TECH
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[0003] The leaves of existing agricultural products absorb more hea...
Method used
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Embodiment 1
[0034] The present embodiment is a method for reducing the absorption of mercury by spinach leaves, comprising the following steps:
[0035] (1) First, spray clean water on the leaves of spinach to clean the leaves, then lay a film on the surface, and spray 0.05% sodium chloride and 0.25% calcium chloride solution on the leaves immediately after the foliar moisture is volatilized;
[0036] (2) After spraying once a week when there was no rain, compared with the blank after two months, the mercury absorption efficiency of spinach in the spraying inhibitor group decreased by 75-82%.
Embodiment 2
[0038] The present embodiment is a method for reducing the absorption of lead by the leaf surface of Chinese cabbage, comprising the following steps:
[0039] (1) First, spray clean water on the leaves of pakchoi to clean the leaves, then lay a film on the surface, and spray 0.05% sodium chloride and 0.1% calcium chloride solution on the leaves immediately after the foliar moisture is volatilized;
[0040] (2) It was sprayed once a week when there was no rain. After two months, compared with the blank, the lead absorption efficiency of pakchoi in the spraying inhibitor group decreased by 81-89%.
Embodiment 3
[0042] The present embodiment is a method for reducing the absorption of cadmium by corn leaves, comprising the following steps:
[0043] (1) First, spray clean water on the corn leaves to clean the leaves, then lay a film on the ground, and spray 0.05% sodium chloride and 0.5% calcium chloride solution on the leaves immediately after the foliar moisture is volatilized;
[0044] (2) Spraying once every 15 days without rain, compared with the blank after three months, the cadmium absorption efficiency of corn plants in the spraying inhibitor group decreased by 91-95%.
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Abstract
The invention discloses a method for reducing heavy metal absorption of crop foliage. Clear water is sprayed on foliage of a target plant to clean the foliage, the ground surface is paved with thin film, and after water on the foliage is completely volatilized, a foliage fertilizer is sprayed on the foliage immediately; the agent is sprayed once every 7-15 days in rainless weather, and the foliage heavy metal absorption rate can be decreased by 60%-95%. The method can effectively reduce the foliage absorption effect to heavy metal ions, and the safety risk of agricultural products can be significantly reduced; absorption of plant foliage to the heavy metal can be effectively reduced, and the foliage heavy metal absorption efficiency can be decreased by 60%-95%; the foliage fertilizer can be jointly applied with foliage fertilizer, and the labor cost is reduced; no waste is produced, and secondary pollution to the environment cannot be caused basically; the method has the advantages of being simple, easy to operate, rapid, effective, low in input cost and the like; the plant foliage can be effectively prevented from heavy metal damage, and the method has an important value to safety production of the agricultural products.
Description
technical field [0001] The invention belongs to the technical field of heavy metal pollution prevention and control, and in particular relates to a method for reducing the absorption of heavy metals by the foliage of crops. Background technique [0002] Heavy metal pollution can cause different degrees of harm to crops, resulting in reduced production of agricultural products and excessive heavy metal content. China's annual grain production loss caused by heavy metal pollution exceeds 10 million tons, and the amount of grain contaminated by heavy metals reaches 12 million tons. Excessive heavy metals have become a huge hidden danger to food safety. In 2013, a report titled "10,000 tons of cadmium-exceeding rice from Hunan flows to Guangdong" attracted widespread attention. The results of a study on the pollution of heavy metals in crops in the tidal flats of the Pearl River Delta show that the content of heavy metals such as lead, cadmium, nickel, chromium and zinc in crop...
Claims
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