Planting method for foliar inhibition of cadmium accumulation on rice grains
A technology for rice grains and planting methods, applied in rice cultivation, fertilization methods, fertilizer mixtures, etc., can solve problems such as suppression, achieve the effects of reducing cadmium content, preventing non-point source pollution, and simple synthesis methods
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Embodiment 1
[0037] Test background: 3.0mg / kg exogenous cadmium polluted soil
[0038]Pot experiment: the pH value of the experimental soil was 7.6, the background value of soil Cd was 0.26mg / kg, and the cation exchange capacity was 18.15±1.07cmol / kg. The following treatment groups were set up: 3.0mg / kg Cd contaminated soil + spraying deionized water, 3.0mg / kg Cd contaminated soil + spraying selenium-silicon composite sol dilution (20×), 3.0mg / kg Cd contaminated soil + spraying Selenium-silicon composite sol dilution (10×), 3.0mg / kg Cd contaminated soil + spraying selenium-silicon composite sol dilution (5×), 3.0mg / kg Cd contaminated soil + spraying selenium nano-sol dilution (10× ), 3.0mg / kg Cd contaminated soil + spraying silicon nano-sol diluent (10×). Three pots of rice were planted in each treatment group. Two weeks before the rice booting, the diluted solution was sprayed twice on the leaves with an interval of 6-7 days. Mature rice was collected, the content of cadmium in brown r...
Embodiment 2
[0041] Experimental Background: Cadmium Contaminated Paddy Fields
[0042] Field experiment: The farmland around XX thermal power plant was selected as the test field, the soil pH value was 7.2, the total soil cadmium content was 2.73±0.49mg / kg, and the cation exchange capacity was 16.53±3.02cmol / kg. Divide 40 mu of polluted paddy fields into 4 parts on average: positive control group (without spraying nano-sol), spraying selenium-silicon composite sol 10× dilution, spraying selenium nano-sol 10× dilution, spraying silicon nano-sol 10× Diluent. The same variety (Liangyou 688) was planted in each treatment group, and the above dilution was sprayed 2 weeks before booting, and sprayed twice with an interval of 7 days. Mature seeds were randomly collected to detect the content of cadmium and selenium in brown rice.
[0043] The results showed that, compared with the positive control group, spraying the above three dilutions reduced the cadmium content of brown rice by 41.6%, 23....
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