CAO Xiaoqiang,ZHAO Jiang,ZHOU Bohan,et al.Effects of Foliar Spraying Calcium on Growth and Physiological Characteristics of Rape Seedlings Under Alkali Stress[J].Northern Horticulture,2023,(01):11-19.[doi:10.11937/bfyy.20222040]
叶面喷施钙素对NaHCO3胁迫下油菜幼苗生长及生理特性的影响
- Title:
- Effects of Foliar Spraying Calcium on Growth and Physiological Characteristics of Rape Seedlings Under Alkali Stress
- 文献标志码:
- A
- 摘要:
- 以“华油杂62（耐盐型）”与“湘油15（敏盐型）”为试材，采用盆栽试验，研究了100 mmol?L-1 NaHCO3胁迫下，油菜幼苗叶面喷施不同浓度CaCl2对其生长及生理特性的影响，以期为油菜在盐碱地的栽培提供参考依据。结果表明：叶面喷施1%和0.5% CaCl2“华油杂62”与“湘油15”茎叶鲜质量，较NaHCO3胁迫分别显著增加了117.58%与88.89%。叶面喷施2% CaCl2显著（P<0.05）提高了“华油杂62”叶片潜在光化学效率（Fv/Fo），较NaHCO3胁迫提高了35.58%，而“湘油15”在钙浓度为1%时，Fv/Fo的提高最为明显，较NaHCO3胁迫提高了19.60%。叶面喷施0.5% CaCl2显著（P<0.05）提高了“湘油15”茎叶组织中K+/Na+，较NaHCO3胁迫增加了58.76%；“华油杂62”叶面喷施1% CaCl2，K+/Na+增加最为明显，较NaHCO3胁迫增加了7.12%。叶面喷施0.5% CaCl2，显著提高了“湘油15”的叶片超氧化物歧化酶（SOD）活性，较NaHCO3胁迫提高了66.21%，“华油杂62”叶面喷施1% CaCl2，SOD活性较NaHCO3胁迫提高了19.36%。综上，叶面喷施适宜浓度CaCl2可以显著促进NaHCO3胁迫下不同耐盐性油菜幼苗的生长，提高其抗逆性，适宜的CaCl2浓度范围为0.5%~1%。
- Abstract:
- A pot experiment was conducted with ‘Huayouza 62 (salt-tolerant)’ and ‘Xiangyou 15 (salt-sensitive)’ as the test material.The effects of folior spraying CaCl2 with different concentrations on the growth and physiological characteristics of rape seedlings under 100 mmol?L-1 NaHCO3 stress were investigated，in order to provide reference for rape cultivation in saline-alkali land.The results showed that when the calcium concentration was 1.0% and 0.5%,the corresponding fresh weight of stems and leaves of ‘Huayouza 62’ and ‘Xiangyou 15’ were increased significantly (P<0.05),which were 117.58% and 88.89% compared with NaHCO3 stress.When the calcium concentration was 2.0%,the potential photochemical efficiency (Fv/Fo) of leaves of ‘Huayouza 62’ was significantly increased (P<0.05),which was increased by 35.58% compared with NaHCO3 stress.When the calcium concentration was 1.0%,the Fv/Fo of ‘Xiangyou 15’ was increased most obviously,which was increased by 19.60% compared with NaHCO3 stress.When calcium concentration was 0.5%,K+/Na+ in stems and leaves tissues of ‘Xiangyou 15’ was significantly increased (P<0.05),which was increased by 58.76% compared with NaHCO3 stress.When calcium concentration was 1.0%,K+/Na+ of ‘Huayouza 62’ was significantly increased (P<0.05),which was increased by 7.12% compared with NaHCO3 stress.When the calcium concentration was 0.5%,the SOD activity in leaves of ‘Xiangyou 15’ was significantly increased (P<0.05),which was increased by 66.21% compared with NaHCO3 stress.When the calcium concentration was 1.0%,the SOD activity in leaves of ‘Huayouza 62’ was significantly increased (P<0.05),which was increased by 19.36% compared with NaHCO3 stress.In conclusion,the suitable concentration of CaCl2 was sprayed on the leaves,it could significantly promote the growth of different salt-tolerant rape seedlings under NaHCO3 stress,and improve their stress resistance.The appropriate CaCl2 concentration range was 0.5%-1.0%.
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备注/Memo
第一作者简介：曹小强（1994-），男，硕士研究生，研究方向为土壤生态与环境安全。E-mail：1916784202@qq.com.责任作者：张凤华（1970-），女，博士，教授，现主要从事干旱区绿洲农业生态等研究工作。E-mail：fenghuazhang2021@163.com.基金项目：国家重点研发资助项目（2021YFD1900802-3）；兵团科技计划资助项目（2020BC001，2018AA005）。收稿日期：2022-05-17