Salt-tolerant sorgo germplasm identification method

Abstract

The invention provides a salt-tolerant sorgo germplasm identification method and relates to the technical field of agriculture. Land parcels with soil plough layers with the light salinity being smaller than 0.3%, the medium salinity between 0.3% and 0.6% and the heavy salinity being larger than 0.6% are selected on a coastal mud flat. Materials to be identified are sown in the land parcels with the soil plough layers with the light salinity, the medium salinity and the heavy salinity. The materials are divided into four grades during mature seedling and milk-ripe stages according to the salt damage degrees of seedlings, and the salinity average values of the 5 cm portions, the 10 cm portions, the 15 cm portions and the 20 cm portions of the soil plough layers where the root of each seedling is located are measured by means of a soil salinity meter when the materials are in different salt damage degrees. The salt tolerance index is calculated according to the average salinity of the soil plough layers for the sampled seedlings in the four salt damage degrees of the materials, and the materials which are high in salt tolerance are selected based on the identified salt tolerance in the mature seedling and milk-ripe stages. By the adoption of the method, the tolerance of sorgos can be identified in a short period of time, operation is easy and visual, cost is low, and reliability is high.

Description

Technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for identifying salt-tolerant sweet sorghum germplasm. Background technique [0002] Cultivated sweet sorghum (Sorghum bicolor (Linn.) Moench subsp. bicolor) belongs to a subspecies of sweet sorghum in the genus Sorghum of the Gramineae sorghum family. Sweet sorghum grains can be used for edible, feeding, and wine making; the stalks can be used as feed, sugar, wine, and beverages. The stalks can also be used for feeding, paper, board, and man-made fibers. Sweet sorghum can be used as feed, sugar, Energy crops are of great development value. With the development of my country's large-scale cattle and goat industry, the application value of sweet sorghum as feed has more prospects. It adds a new option to the rapid improvement of saline-alkali land. Sweet sorghum has rapid growth, fast sugar accumulation, high biological yield, wide adaptability, strong drought and flo...

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Problems solved by technology

However, affected by various factors such as terrain, cultivation, parent material, vegetation, etc., under the action of precipitation and evaporation, the water-salt movement of salt redistribution in the soil is continuously carried out, resulting in uneven soil desalination, which is common in the same field of coastal beaches in Jiangsu. There are light, medium and heavy salinity, until the soil with salt spots (Chen Hongyou

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