棉粕对盐碱胁迫下棉花生理及生长补偿效应
Effect of Cottonseed Meal on Cotton Physiology and Growth Compensation Under Salinity-alkalinity Stress
- Agricultural College, Shihezi University, Shihezi 832000, China
Received date: 2018-04-08
Accepted date: 2018-08-23
Online published: 2018-12-10
摘要
为探究棉粕对盐碱胁迫下棉花(Gossypium hirsutum)的抗盐碱机理, 通过田间试验, 研究添加不同棉粕用量对8 g·kg -1盐碱胁迫下棉花生理及生长的补偿效应。结果表明, 添加棉粕能够增加盐碱胁迫下棉花不同器官对K +的吸收, 降低对Na +的吸收, 维持盐碱胁迫下细胞内K +和Na +的平衡, 显著促进棉花生长, 提高叶片叶绿素含量和光合作用效率, 有效缓解盐碱胁迫对棉花的伤害。其中, 以添加6 000 kg·hm -2棉粕处理的效果最显著, 且盐胁迫下棉粕的改良效果较好。主成分分析结果表明, 盐碱胁迫下棉花生长生理的主要影响因子为叶片K +/Na +比值、根长、鲜重、干重和胞间CO2浓度(Ci)。
本文引用格式
马宏秀,王开勇,张开祥,孟春梅,安梦洁 . 棉粕对盐碱胁迫下棉花生理及生长补偿效应[J]. 植物学报, 2019 , 54(2) : 208 -216 . DOI: 10.11983/CBB18089
Abstract
We investigated the salt-tolerant mechanism of cottonseed meal in cotton (Gossypium hirsutum) under sali- nity-alkalinity stress. Salinity-alkalinity stress of 8 g·kg -1was tested in the field to explore the effect of cottonseed meal dose on the physiology and growth of cotton. Cottonseed meal could increase the absorption of K + and decrease that of Na +. K + and Na + were kept in ion balance in cells under salinity-alkalinity stress. Cottonseed meal could effectively alleviate damage to cotton, significantly promote growth of cotton, and improve chlorophyll content and photosynthesis of leaves. An amount of 6 000 kg·hm -2 cottonseed meal was the most significant treatment, and the improvement effect of cottonseed meal under salt stress was better. According to principal component analysis, the K +/Na +ratio in leaves, root length, fresh weight, dry weight and intercellular CO2 concentration were the main factors involved in salinity-alkalinity stress.
Key words： cottonseed meal; salinity-alkalinity stress; physiology; growth; compensation effect
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