Method for sieving salt-tolerant varieties of osmanthus fragrans

Abstract

The invention relates to a method for sieving salt-tolerant varieties of osmanthus fragrans. The method comprises the following steps of: (1) selecting seven triennial osmanthus fragran varieties with excellent characteristics, culturing the varieties elaborately for 90 days, and measuring the salt content in soil; (2) preparing a 0.03-percent salt solution, a 0.5-percent salt solution and a 0.7-percent salt solution of sodium chloride respectively, and preparing tap water serving as a reference (control check(CK)); (3) putting the selected osmanthus fragran varieties under a single shed, airing for the selected varieties for 20 days, watering the varieties continuously for 3 days with the three salt solutions of sodium chloride respectively, and measuring the salt content in the soil again; (4) after the treatment is finished, measuring the growth amount of shoots periodically, recording the salt damage condition, measuring a photosynthetic rate and a transpiration rate, and replenishing saline with corresponding concentration at any time according to the salt content in the soil in the experiment process, so that the salt concentration of the soil is kept constant; and (5) obtaining results of the strength of salt tolerances of different osmanthus fragran varieties by mathematic statistic analysis. By the method, the salt-tolerant varieties of the osmanthus fragrans can be sieved in a short time, so the method is short in time consumption, easy and convenient to operate and low in cost.

Description

technical field [0001] The invention belongs to the field of crop cultivation, and specifically relates to a method for obtaining salt-tolerant sweet-scented osmanthus varieties based on the measurement and screening of growth and physiological indexes. Background technique [0002] Saline-alkali soil is a soil type widely distributed on the earth's land, accounting for about 25% of the total land area. The total area of ​​saline-alkali soil in my country is about 500 million mu, of which more than 200 million mu has been reclaimed, and nearly 300 million mu of saline-alkali wasteland remains to be utilized and improved. Coupled with the increase in carbon dioxide emissions in recent years, the greenhouse effect has formed, resulting in rising global temperatures and rising sea levels, which have caused soil salinization to become increasingly serious. The large area of ​​saline-alkali land in northern my country has brought negative impacts that cannot be ignored on societ...

AI Technical Summary

Problems solved by technology

[0005] At present, the AHP method has been used to comprehensively evaluate the application of osmanthus varieties, and 23 osmanthus varieties with promotion potential in the Yangtze River Delta region have been screened out, including 8 excellent osmanthus varieties. However, there is no simple and fast method for screening osmanthus salt-tolerant varieties method, for further study