Method for screening rice variety with low accumulation of toxic heavy metal

Abstract

The invention discloses a method for screening a rice variety with low accumulation of toxic heavy metal, and belongs to the technical field of crossing of agricultural technologies and ecological technologies. The screening method mainly comprises the steps of improving a formula of a nutrient solution, carrying out operation methods of seed disinfection and sterilization, germination acceleration and seedling transplanting, and adding the heavy metal into the nutrient solution at the initial experiment period. The actual situation of daily rice planting is better accorded with; it takes a short time to accurately screen out the rice variety with the low accumulation of the toxic heavy metal; rice seedlings are adopted for experiments, the experiment period is short, and the experiment effect is remarkable; the adopted experiment method requires a small experiment site and is easy to operate, low in experiment cost and convenient in data analysis.

Description

technical field [0001] The invention relates to the interdisciplinary technical fields of agricultural technology and ecological technology, in particular to a method for screening rice varieties with low accumulation of toxic heavy metals. Background technique [0002] In low-to-medium pollution areas or farmland soils that have been rehabilitated but failed to meet the "Soil Environmental Quality Standard GB15618-1995" due to various factors, planting low-accumulation rice can make the rice meet the "National Food Safety Standard - Contaminant Limits in Food" "(GB2762-2012). [0003] Existing methods for screening low-accumulation heavy metal crop varieties include field experiments, greenhouse soil culture and laboratory hydroponics. The field test screening requires a long process, and the external environment is greatly affected; when the soil culture crops in the greenhouse are sown in a solid culture medium, it is difficult to mark each seed or the workload of markin...

AI Technical Summary

Problems solved by technology

The field test screening requires a long process, and the external environment is greatly affected; when the soil culture crops in the greenhouse are sown in a solid culture medium, it is difficult to mark each seed or the workload of marking is too large. During the transplanting process, the roots of the crop seedlings The aboveground part is easily damaged, and it is difficult to harvest complete roots when the plants are harvested. The components in the soil and nutrient pots are complex and difficult to control, which has certain limitations for the experimental part; the laboratory hydroponics is relatively faster, but in view of The soil composition is complex, so there is no way to completely simulate the actual growth environment of the crops only by using hydroponics plus culture medium, and it is also impossible to ensure that the roots of the plants are completely harvested when the plants are harvested. The addition of heavy metals in the later stage of cultivation does not conform to the actual production situation. And the cultivation time is relatively long

Images