Method for screening seedling stage salt-tolerance rice variety

Abstract

The invention discloses a method for screening a seedling stage salt-tolerance rice variety. First, high-salt soil and low-salt soil are taken at a high-salt content plot and a low-salt content plot respectively, and then at least four gradients with the salt concentration range being 1.56%-5.78% is prepared. Prepared salt soil is placed into a plastic vessel, then, sowing is carried out, dry seeds of the variety with the germination potential and the germination rate being at least 90% are sown to the prepared salt soil, irrigation is carried out after sowing, and complete irrigation is needed for first-time irrigation. Before three-leaf stage, soil is kept wet. After three-leaf stage, paoma water irrigation is carried out (namely after irrigation is carried out by one time, water is discharged immediately, when a field side becomes white, irrigation is carried out again, and water is discharged again), and soil wetting and drying alternation is kept. After emerging, the emergence rate is surveyed, and after three-leaf stage, the seedling rate is surveyed. The variety with the high emergence rate and the high seedling rate is the salt-tolerance variety. According to the method, soil with various salt concentrations can be prepared quickly and accurately, the shortcomings that during production, saline-alkali soil salt content distribution is very uneven, and a NaCl solution prepared in a laboratory cannot simulate a soil environment can be overcome, and the salt-tolerance variety can be screened quickly and effectively.

Description

technical field [0001] The invention relates to a method for screening salt-tolerant rice varieties at the seedling stage, and belongs to the field of agricultural technology. Background technique [0002] Soil salinization is a worldwide problem. Salinity-alkali hazards have caused a large number of medium and low-yield fields, making it difficult to use large areas of soil resources, reducing the comprehensive agricultural production capacity, and seriously affecting the sustainable development of agricultural production. Planting rice is a successful experience in biological treatment of saline-alkali land. Long-term rice planting in saline-alkali land can not only improve the soil by washing the saline-alkali water, effectively improve the ecological environment, but also effectively increase grain production. [0003] At present, the selection of salt-tolerant rice varieties has become an important goal of rice cultivation in saline-alkali land. Due to the uneven dis...

AI Technical Summary

Problems solved by technology

Although this method can accurately prepare the required salt solution concentration, it cannot accurately simulate the saline-alkali soil environment, and the saline-alkali soil types in different regions are different in production (such as the saline-alkali soil type in the Yellow River Delta area is different from that in the Northeast and Northwest. saline-alkali land in the region), and as the soil moisture changes, the soil salinity also changes constantly, so the salt content in the soil is not a constant, but a variable

This dynamic change cannot be reflected simply through the NaCl solution prepared in the laboratory, so it has great limitations for screening salt-tolerant rice varieties

Images