A Method for Identifying Salt Tolerance of Cotton Seedling Stage

Abstract

A method for identifying the salt tolerance of cotton seedlings, the specific steps of which are planting box preparation, field digging, soil sieving, boxing, pitting, watering before sowing, film spreading, film covering, film removal, and salt application , survey statistics, identification conclusions. The salt tolerance of cotton varieties is judged by the relative survival rate, which is divided into four grades. Finally, the salt tolerance of each variety under different treatment levels of salt application is listed, and then the range and limit of salt tolerance of each variety are obtained. The preferred salt application levels for each treatment are 0, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%; the size of the planting box is 90cm*30cm*30cm. It has low requirements on facilities and equipment, low cost, rich data and reliable results. Not only is it suitable for cotton, but its design ideas can be used for reference and popularized in the identification of salt tolerance of crops such as wheat and corn.

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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