中国农业科技导报2025，Vol.27Issue(4)：57-67,11.DOI:10.13304/j.nykjdb.2023.0810
新疆棉花萌发期的耐盐能力分析
Analysis of Salt Tolerance Capacity of Xinjiang Cotton Guring Germination
摘要
Abstract
Aiming at the limited cultivated soil resources in southern Xinjiang,the effects of mixed salt on cotton seed germination were studied,and the tolerance of cotton to saline-alkali soil environment was discussed.To simulate the complex saline-alkali environment in southern Xinjiang,NaCl,Na2SO4,NaHCO3 and Na2CO3 were mixed in molar ratios of 1∶0∶0∶0(S1),9∶1∶0∶0(S2),0∶0∶9∶1(S3)and 9∶1∶9∶1(S4).5 salt levels(40,80,120,160 and 200 mmol·L-1)were set to stress the germination period of cotton seeds for varieties Tahe 2 and Xinluzhong 62.The seed germination potential,germination rate,germination rate,salt tolerance critical salinity concentration,and early seedling fresh weight and dry weight were analyzed by using distilled water as control(CK).The results showed that all 4 salt stresses significantly reduced the germination potential of cotton seeds.At 40 mmol·L-1,there was no significant difference in germination rate between S1～S4 treatments and CK,but as the salt level increased(≥80 mmol·L-1),the germination rate of cotton seeds significantly decreased.At the same salt level,the germination rate of both cotton varieties in the S4 treatment was higher than that in the S1,S2 and S3 treatments.The 4 salt stresses caused a delay in the initial germination time of cotton seeds,and the germination rate significantly decreased.The S1,S2 and S3 treatments at 40 mmol·L-1 promoted the accumulation of fresh weight and dry weight of cotton seedlings,and with the increase in salt level the fresh weight and dry weight of cotton seedlings gradually decreased,and all levels of the S4 treatment reduced the fresh weight and dry weight of cotton seedlings.Correlation analysis and principal component analysis indicated that germination rate was an important indicator for evaluating the salt tolerance of cotton during the germination period.Under 4 salt stresses,the salt tolerance critical salinity concentration of cotton seed germination rate was as S4>S2>S1>S3.In summary,during the germination period of cotton seeds,there was a certain level of tolerance to 40 mmol·L-1 of the 4 salt stresses,but as the salt level increased,the 4 salt stresses resulted in a delayed germination time,decreased germination potential,germination rate and germination rate.Xinluzhong 62 showed strong tolerance to NaCl,and Tahe 2 exhibited strong tolerance to mixed salts.Above results provided a theoretical basis for the breeding of cotton germplasm in southern Xinjiang and evaluated important indicators of salt tolerance during the germination period of cotton seeds.关键词
棉花/复合盐/盐胁迫/萌发/种子Key words
cotton/complex salts/salt stress/germination/seed分类
农业科技引用本文复制引用
董志多,付秋萍,黄建,祁通,付彦博,开赛尔·库尔班..新疆棉花萌发期的耐盐能力分析[J].中国农业科技导报,2025,27(4):57-67,11.基金项目
新疆维吾尔自治区重点研发项目(2022B02009-3) （2022B02009-3）
新疆维吾尔自治区重大专项(2022A02007-1) （2022A02007-1）
国家重点研发计划项目(2021YFD1900802). （2021YFD1900802）
