Identification and Screening of Low Nitrogen Tolerance Characteristics of Highland Barley at Seedling Stage
SHI Xueshuang
HAN Jing
FAN Xiaotong
KONG Fanmei
ZHANG Xiaocun
Abstract：To explore the low nitrogen tolerance traits of highland barley at seedling stage,98 varieties(lines)were used as the materials,and 2 treatments of low nitrogen(0.1 mmol/L)and normal nitrogen(1.0 mmol/L)were set up.The variations of chlorophyll levels,fresh plant weight,root length,and nutrient mass fraction at the seedling stage under both nitrogen conditions were analyzed.The results showed that compared with the normal nitrogen treatment,the average root length of 98 barley samples under low nitrogen conditions increased from 25.04 cm to 29.51 cm.The root-shoot ratio rose from 0.48 to 0.79,and the average fresh root weight increased from 0.23 g/plant to 0.28 g/plant.The average aboveground length of single plant reduced from 34.18 cm to 28.64 cm.The average aboveground fresh weight reduced from 0.61 g/plant to 0.30 g/plant.The SPAD value decreased from 23.41 to 21.26,and the nitrogen mass fraction decreased from 29.11 g/kg to 15.50 g/kg.Notably,the nitrogen efficiency of Heiqingke,Jiangse,and Ximara 23 under low nitrogen conditions was 8.14,which was higher than that of other varieties tested.Thus,they are high-efficiency varieties(lines)under low nitrogen conditions at the seedling stage.
Keywords：Highland barleyLow nitrogenSeedling stageAgronomic trait
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 43-48 )