Method for significantly lowering leaf lettuce cadmium content with salicylic acid and improving quality of lettuce

A technology for leaf lettuce and salicylic acid, which is applied in horticultural methods, botanical equipment and methods, applications, etc., can solve the problems of reducing cadmium content and not conducting research, and achieves reducing Cd content, electrical conductivity, and content. Effect

Inactive Publication Date: 2017-12-01
SICHUAN AGRI UNIV
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  • Abstract
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Problems solved by technology

On the basis of their studies, the administration of exogenous salicylic acid may not be beneficial in reducing cadmium levels
In addition, the report did not conduct research on how to improve the quality of lettuce under cadmium stress.

Method used

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  • Method for significantly lowering leaf lettuce cadmium content with salicylic acid and improving quality of lettuce
  • Method for significantly lowering leaf lettuce cadmium content with salicylic acid and improving quality of lettuce
  • Method for significantly lowering leaf lettuce cadmium content with salicylic acid and improving quality of lettuce

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Experimental program
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Effect test

Embodiment 1

[0026] Choose lettuce seeds with the same size and full grains (purchased from Guangdong Kenong Vegetable Seed Industry Co., Ltd., the variety is common glass lettuce in Sichuan), sterilize in 10% (m / m) hydrogen peroxide solution for 10min, and then use ultra- Wash with pure water, place evenly in a petri dish with filter paper, keep sufficient water, and germinate in an artificial incubator at 20°C. After the seeds are 0.5cm white, they are sown in enamel trays filled with clean river sand for sand-based culture. According to the growth status, spray 1 / 2 Hoagland nutrient solution to the sand base in an appropriate amount every day, set the incubator at 23°C / 18°C (day / night), and light for 14h. When the 4 true leaves of the seedlings are fully expanded, select strong seedlings with consistent growth and transplant them into 10cm × 10cm (bottom × height) plastic flower pots equipped with clean river sand (playing a fixing role) (gauze is placed on the bottom of the flower pot,...

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Abstract

The invention provides a method for significantly lowering the leaf lettuce cadmium content with salicylic acid and improving the quality of the lettuce. The method comprises the following steps that after leaf lettuce seedlings mature, foliage spraying is conducted with a salicylic acid water solution with the concentration being 25-200 micromol / L, the spraying amount is controlled to meet the condition that water drips from the leaf surface, and spraying is conducted once every two days and conducted three times in total. Accordingly, inhibition of Cd stress to lettuce growth and photosynthesis can be relieved, nitrate and the overground part Cd content of the lettuce are significantly lowered, and the lettuce quality is significantly improved; the lettuce MDA content and electrical conductivity under the Cd stress are lowered, and damage of the Cd stress to a cell membrane is relieved.

Description

technical field [0001] The invention belongs to the technical field of vegetable planting, and in particular relates to a method for significantly reducing the cadmium content of leaf lettuce and improving its quality by using salicylic acid. Background technique [0002] According to the "China Cultivated Land Geochemical Survey Report (2015)" issued by the my country Geological Survey Bureau, there are 2.32 million hm 2 Heavy metal heavy metal pollution or exceeding the standard cultivated land accounted for 16.1% of the total cultivated land. On April 17, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources jointly announced the National Soil Pollution Survey Bulletin, pointing out that the soil environment in my country is worrying, and the pollution of heavy metals such as Cd is relatively prominent. From the perspective of pollution distribution, soil pollution in the south is relatively high. The soil pollution in the north is relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G7/06A01G1/00
CPCA01G7/06
Inventor 谭华强李焕秀刘继孙国超唐懿谢永东陈晴
Owner SICHUAN AGRI UNIV
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