基于熵权理论的模糊综合评判法在棉花耐盐性评价中的应用(英文)

目的]提出棉花品种耐盐性的模糊熵权综合评价方法,实现对棉花品种耐盐性的客观、准确的综合评价。方法]设置砂培试验,采用150 mmol/L的NaCl水溶液模拟盐胁迫,以各指标盐害系数为依据,运用模糊熵权综合评价法计算出各指标的权重,并对棉花品种的耐盐性进行了综合评价。结果]在萌发期各指标盐害系数的熵值和权重以发芽势、活力指数、下胚轴长和鲜重较高,发芽率和发芽指数次之,根长最小;在苗期各指标盐害系数的熵值和权重以叶片膜透性伤害率、根系活力和叶片伸展速率较高,株高和净光合速率次之,地上部干重和根系干重最小。棉花的耐盐性在生育期和品种间表现不同,中棉所44和中棉所75是萌发期和苗期均表现稳定的耐盐品种,表现稳定且中等耐盐品种有中棉所17、苏棉22号、苏棉15号和德夏棉1号,表现稳定但耐盐性较差的品种是苏棉12和泗棉3号。结论]该方法评价结果客观准确,可用于棉花品种耐盐性的综合评价。

Application of Fuzzy Comprehensive Evaluation Method Based on Entropy Weight Theory in Evaluation of Salt Tolerance of Cotton

Objective] The aim was to propose a new entropy weight fuzzy compre- hensive evaluation method for assessing cotton salt tolerance, realizing the objective, accurate and comprehensive evaluation of salt tolerance of cotton. Method] A sand culture experiment under salt stress of 150 mmol/L of NaCI was designed. The in- dicator weight was determined with the entropy weight fuzzy comprehensive evalu- ation method, based on the salt injury index of indicators. The salt tolerance of cotton was evaluated comprehensively. Result] At the germination stage, the entropy and weight of salt injury index of germination energy, vigor index, hypocotyl length and fresh weight were highest, followed by germination rate and germination index, and of root length were lowest. At the seedling stage, the entropy and weight of salt injury index of plasma membrane permeability, root vigor and leaf expansion rate were highest, followed by plant height and net photosynthetic rate, and of shoot dry weight and root dry weight were lowest. The salt tolerance of cotton differed a- mong growth stages and cultivars. Among the 11 cultivars, CCRI-44 and CCRI-75 were steadily salt-tolerant at both germination and seedling stages; CCRI-17, Sumi- an 22, Sumian 15 and Dexiamianl had a stable moderate salt tolerance; while Sumian 12 and Simian 3 were steadily salt-sensitive. Conclusion] The evaluated result was objective and exact, which indicated that this method could be used in comprehensive evaluation of salt tolerance of cotton.