Chinese Bulletin of Botany ›› 2019, Vol. 54 ›› Issue (2): 208-216.DOI: 10.11983/CBB18089

Special Issue: 逆境生物学专辑 (2019年54卷2期)

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Effect of Cottonseed Meal on Cotton Physiology and Growth Compensation Under Salinity-alkalinity Stress

Hongxiu Ma,Kaiyong Wang(),Kaixiang Zhang,Chunmei Meng,Mengjie An   

  1. Agricultural College, Shihezi University, Shihezi 832000, China
  • Received:2018-04-08 Accepted:2018-08-23 Online:2019-03-10 Published:2019-09-01
  • Contact: Kaiyong Wang

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