生态环境学报2016，Vol.25Issue(10)：1671-1677,7.DOI:10.16258/j.cnki.1674-5906.2016.10.011
硅、硒、黄腐酸、氯甲基吡啶组合对棉花生长及抗盐生理特性的影响
Influences of the Combination Using of Silicon, Selenium, Fulvic Acid, Nitrapyrin on Cotton Growth and Cotton Plant Salt-resistant Physiological Characteristics
摘要
Abstract
Improving the resistance of cotton to salt stress is the great challenge for cotton industry in saline soil in arid area. In this study, hydroponic and plot experiments were carried out to investigate the effects of silicon, selenium, fulvic acid, nitrapyrin, so-called stress resistance substances, and their combinations of Se-Fa, Fa-Ni, Se-Fa-Ni, Si-Se-Fa-Ni on cotton biomass, root volume, root activity. Meanwhile, cotton leaf antioxidant enzyme activities, including SOD, POD, CAT, APX, and both MDA and Pro were determined. Moreover, salty ions of Na+ and Cl- in cotton plant as well as the ratios of Ca2+/Na+ and K+/Na+ were also measured. The objectives of this study were to (1) explore the effectof stress-resistance substances and its combinations on increasing the ability of cotton plant resistantto salt stress, (2) screen out the optimizing combination treatment to alleviate the injury of salt stress on cotton growth. Results showed that all combination treatments significantly relieved the salt stress on cotton plant growth. For instance, compared with CK, cotton above-ground and root dry matter, root volume and activity increased by 69%~148%, 89%~190%, 88%~137% and 187%~400%, respectively. Moreover, it was found that different combination treatments exhibited a significant effect on decreasing the salt stress to cotton enzyme activity. For instance, enzyme activities of SOD, POD, CAT, APX significantly increased by 11%~54%, 11%~77%, 13%~48% and 30%~127% relative to CK, respectively. In addition, it was observed that MDA and Pro content of cotton leaves significantly decreased by 12%~48% and 37%~49%, respectively, across all combination treatments in compared with CK. Furthermore, different combination treatments presented an obvious effect on decreasing salty ions uptake in cotton plant. For example, the salty ions contents of Na+ and Cl- in combination treatments were 8%~28% and 10%~24% lower than those in CK. On the other side, the ratios of K+/Na+ and Ca2+/Na+ were 71%~168%, 72%~164% greater in combination treatments than that in CK (hydroponic experiment). Similar result was also observed in field experiment. From our findings, the conclusion can be drawn that combinations of silicon, selenium, fulvic acid, nitrapyrin exerted a significant role on alleviating the injury of salt stress on cotton. Cotton biomass and antioxidant enzyme activity were largely increased with combination treatments. Meanwhile, combination treatments significantly decreased the contents of salty ions and harm substances in cotton, as a consequent, the resistance of cotton to salt stress substantially improved by combination treatments, and Se-Fa-Ni and Si-Se-Fa-Ni treatments were identified as the optimizing combinations.关键词
棉花/抗盐性/酶活性/硅/硒/黄腐酸/氯甲基吡啶Key words
cotton/salt resistance/enzyme activity/silicon/selenium/fulvic acid/nitrapyrin分类
农业科技引用本文复制引用
张梅,李泽剑,唐诚,褚贵新..硅、硒、黄腐酸、氯甲基吡啶组合对棉花生长及抗盐生理特性的影响[J].生态环境学报,2016,25(10):1671-1677,7.基金项目
农业部公益性行业（农业）科研专项 （）
