Saline-alkali land clayey soil field salinity regulation and control method

Abstract

The invention discloses a saline-alkali land clayey soil field salinity regulation and control method. The method comprises the steps that average water content of soil 0.5 deep is determined through selecting a saline-alkali land parcel and constructing lateral seepage prevention facilities and water drainage and salt elimination facilities, salt water mineralization degree blending is conducted through utilizing a linear relation between the salt water mineralization degree and soil total salt content, and the blended salt water is used for conducting irrigation, so that the soil salt content reaches a preset concentration, and the purposes of gradient salinity identification and selection of salt tolerance of crops are achieved. The saline-alkali land clayey soil field salinity regulation and control method is simple, convenient and easy to operate, and the method has a larger usage value in saline-alkali land selection of salt-tolerant crops and salt-tolerant crop breeding application.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land utilization, and relates to the identification and screening of salt-tolerant crops, in particular to a field salinity control method for clayey soil in saline-alkali land. Background technique [0002] Saline-alkali land is an important reserve resource of land in my country. my country's saline-alkali land is mainly distributed in 17 provinces including Northwest, Northeast, North China and coastal areas, with a total area of ​​more than 500 million mu. Coastal saline-alkali land is a typical type, which is affected by soil parent material and seawater erosion, and is quite different from inland saline-alkali land. The main component of salt content is sodium chloride. Sustainable agricultural development is of paramount importance. [0003] The identification and screening of crop salt tolerance is the basis for the selection of salt-tolerant crops. At present, the identification me...

AI Technical Summary

Problems solved by technology

The above-mentioned known technologies mainly use salt solution preparation, rain-proof shelter facilities, and carry out salt-tolerant identification and salt-tolerant crop screening of crops through hydroponics, sand culture, etc., and are mainly aimed at the salt-tolerant identification and salt-tolerant screening of crops at the seedling stage. However, since the actual growth carrier of crops is soil, simulated substrates such as water and sand culture have certain technical difficulties in the comprehensive regulation of water, air, and temperature. The effects of different growth conditions, crop quantity, and facility costs during the growth period all have certain limitations.