Method for identifying salt tolerance of cotton in seedling period

Abstract

The invention discloses a method for identifying the salt tolerance of cotton in a seedling period. The method comprises the specific steps: planting box preparation, field digging, soil sieving, boxing, pit filling, watering before sowing, film mulching, sowing and film mulching, film uncovering, salt application, investigation statistic and expert conclusion. Judged by a relative survival ratio,the salt tolerance of cotton varieties is divided into four grades, finally, the salt tolerance of each variety under salt application levels of different treatments is listed, and furthermore, the salt tolerance range and limit of each variety are obtained. Preferably, the salt application levels of all the treatments are 0, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75% and 0.8%; and the length, width and height of a planting box are respectively 90cm, 30cm and 30cm. The method is low in facility / equipment requirement, low in cost, abundant in data and reliable in result. The method isnot only suitable for cottons, and a design thought of the method can be referred, popularized and applied to identification of salt tolerance of crops such as wheat and corns.

Description

technical field [0001] The invention relates to an agricultural test identification method, in particular to an identification method for cotton seedling salt tolerance. Background technique [0002] Saline-alkali soil is a general term for saline soil and alkaline soil, and is a series of soils formed by salinization or alkalization. The salt content in the soil is above 0.1%-0.2%, or the soil colloid absorbs a certain amount of exchangeable sodium, and the alkalization degree is above 15%-20%, or it is called saline soil. The world's saline soil is distributed in more than 100 countries and regions, with a total of 950 million hectares, accounting for about 10% of the total land area. [0003] The distribution of saline-alkali soil in China is relatively wide, mainly in the inland arid and semi-arid areas of North China, Northeast China and Northwest China, and also in coastal areas along the eastern coast including Taiwan Province, Hainan Province and other islands. Sal...

AI Technical Summary

Problems solved by technology

This method solves the automatic transportation of saline nutrient solution, but its pipeline planting method is not suitable for the identification of crops with developed root systems such as cotton, and after the salt content in the nutrient solution is transported to the pipeline, there is a problem with the salt content in the soil. Clear and inconsistent situations, the identification conditions are far from the actual production environment, which affects the application of identification conclusions

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