干旱地区农业研究2026，Vol.44Issue(3)：23-36,57,15.DOI:10.7606/j.issn.1000-7601.2026.03.03
盐胁迫下不同旱碱麦品种幼苗耐盐生长生理特性及氮素累积特征
Physiological characteristics of salt tolerance and nitrogen accumulation in seedlings of different drought-tolerant and alkali-tolerant wheat varieties under salt stress
摘要
Abstract
Six drought-tolerant and alkali-tolerant wheat varieties widely applied in saline farmlands('Cang-mai 15','Cangmai 12','Jiemai 19','Cangmai 6002','Hannong 1412',and'Henong9204')were evalua-ted under hydroponic conditions.Four salinity levels(0,40,80,and 120 mmol·L-1 NaCl)were used to simulate non-saline,mild,moderate,and severe salt stress environments,with a consistent nitrogen supply(5 mmol·L-1 urea),to systematically analyze the physiological responses and nitrogen accumulation characteristics of different cultivars under salt stress.The results showed that the physiological responses of different wheat cultivars were sig-nificantly different with the increase of salt stress level.Under 40 mmol·L-1NaCl,the germination vigor of'Cang-mai 12'increased significantly by 19.15％compared to CK(0 mmol·L-1 NaCl treatment).Its root length in-creased significantly by 88.87％and 29.13％under 40 mmol·L-1 and 80 mmol·L-1 salt stress,respectively,with fresh weight increased by 15.38％(P＜0.05).Plant height of'Cangmai 15'increased by 3.58％under 40 mmol·L-1 NaCl.Cultivars also exhibited distinct physiological thresholds to salinity.The SPAD values of'Cangmai 15'increased by 4.85％-9.71％across all salt levels,and its shoot K+/Na+ratio was significantly higher than that of the other cultivars under 40 mmol·L-1NaCl.'Cangmai 12'exhibited higher shoot K+/Na+ratios than the other cultivars under 80 and 120 mmol·L-1 NaCl.In contrast,'Henong 9204'had the highest root K+/Na+ratio under 40 mmol·L-1 NaCl.In terms of plant osmotic regulation,under 40 mmol·L-1 salt stress,the free proline content of'Cangmai 12'was 2.14 times that of the CK,while under 80 mmol·L-1 and 120 mmol·L-1 salt stress,the free pro-line content of'Hannong 1412'was 12.00 times and 28.77 times that of CK,respectively.Although nitrogen uptake was suppressed under salt stress,both'Cangmai 15'and'Cangmai 12'exhibited significantly higher nitrogen use efficiency under 40 mmol·L-1 NaCl salt stress,showing significant increases of 13.59％and 9.29％compared to CK,respectively(P＜0.05).Overall,the salt tolerance and nitrogen use efficiency of the six drought-tolerant and alkali-tolerant wheat varieties ranked as follows:'Cangmai 12'＞'Cangmai 15'＞'Cangmai 6002'＞'Henong 9204'＞'Han-nong 1412'＞'Jiemai 19'.关键词
旱碱麦/耐盐性/生理特性/氮素累积/盐胁迫Key words
drought-tolerant and alkali-tolerant wheat varieties/salt tolerance/physiological characteristics/nitrogen accumulation/salt stress分类
农业科技引用本文复制引用
刘芮怡,王小敏,吉艳芝,李津津,韩雨格,郭艳杰..盐胁迫下不同旱碱麦品种幼苗耐盐生长生理特性及氮素累积特征[J].干旱地区农业研究,2026,44(3):23-36,57,15.基金项目
河北省省级科技计划(24466301D) （24466301D）
