ACTA AGRICULTURAE BOREALI-SINICA ›› 2011, Vol. 26 ›› Issue (2): 192-197. doi: 10.7668/hbnxb.2011.02.040

Special Issue: Sweet pepper Saline-alkali stress

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Effects of KNO3,K2SO4 and Their Mixed Salt Stress on Plant Growth and Leaf Photosynthetic Characteristic of Pepper Seedling

JIANG Wei1,2, CUI Shi-mao1, ZHANG Yi-ting1, GAO Ying-bo1, WANG Jian-guo2, HU Shuan-hong2, WANG Xiu-zhi3   

  1. 1. Agronomy College, Inner Mongolia Agricultural University, Huhhot 010018, China;
    2. Vegetable Institute, Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences, Huhhot 010031, China;
    3. Vegetable Center, Chifeng Institute of Agriculture Science, Chifeng 024031, China
  • Received:2011-01-23 Published:2011-04-28

Abstract: The effects of KN03,K2S04 and their mixed salt stress(0,50,100,150,200 mmol/L)on plant growth and photosynthetic characters of pepper(Liangjian named)seedling were investigated.The results showed that plant height,root length,leaf numbers,accumulation of biomass production,the total Chl,Chla,Chlb,net photosynthetic rate,transpiration rate,stomatal conductance and water utility efficiency decreased gradually,and intercellular C02 concentration increased gradually with increasing of salt concentration.The reduction of net photosynthetic rate under relatively lower salt treatment was the result of stomatal limitation,and non·stomatal limitation was the main reason for the decrease of net photosynthetic rate under higher salinity stress.K2 S04 salt hurt more important on pepper seedling LiangJian than KN03 and their mixed salt(1:1).

Key words: Secondary salinization, Pepper, Salt stress, Photosynthetic characteristic

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Cite this article

JIANG Wei, CUI Shi-mao, ZHANG Yi-ting, GAO Ying-bo, WANG Jian-guo, HU Shuan-hong, WANG Xiu-zhi. Effects of KNO3,K2SO4 and Their Mixed Salt Stress on Plant Growth and Leaf Photosynthetic Characteristic of Pepper Seedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(2): 192-197. doi: 10.7668/hbnxb.2011.02.040.

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