Physiological response and comprehensive evaluation of saline-alkali tolerance in forage oat at milky stage
CUI Haoyu
WANG Xinru
YANG Yang
QI Bingjie
Abstract：The experiment aimed to investigate the physiological responses and salt-alkali tolerance of forage oat during the milky stage to salt-alkali stress.Seven cultivars were systematically evaluated using growth,photosynthetic,ion homeostasis,physiological resistance,and quality indicators.The results showed that saline-alkali tolerance significantly inhibited plant height,leaf area,biomass accumulation,and photosynthetic performance of some varieties.Among them,the comprehensive salt-tolerance and alkalinity resistance of Mu Wang was relatively good.The plant height decreased by only 9.18％,the salt-alkali tolerance index of leaf area was 92.12％,the salt-alkali tolerance index of chlorophyll relative content(SPAD)was 80.89％,the nitrogen metabolism ability of the entire plant was relatively high,and the sodium ion(Na+)content in the leaf was low.The comprehensive score was the highest(0.687).Principal component analysis identified photosynthetic stability,ion compartmentalization,and nitrogen metabolism efficiency as the core physiological determinants of saline-alkali tolerance,with a cumulative contribution rate of 86.210％from the four principal components.The comprehensive evaluation of saline-alkali tolerance was ranked as follows:Mu Wang＞Baiyan No.15＞Bayou No.18＞Baiyan No.7＞Baiyan No.2＞V8＞Bayan No.6.This study shows that Mu Wang has outstanding saline-alkali tolerance and excellent agronomic traits,making it a high-yield and high-quality oat variety suitable for planting in saline-alkali land.
Keywords：saline-alkali stressforage oatagronomic traitsprincipal component analysis
Publication Date：2026-01-16
Online Publishing Date：2026-03-16(First online date of this platform, not the publication date of the document)
Pages：8( 82-89 )