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《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2012年14期

Page:

144-146

Research Field:

Publishing date:

Info

Title:

Effects of Different Ca2+ Concentrations on the Growth，Photosynthetic Characteristics， Protective Enzyme Activity of Watermelon Seedling

Author(s):

ZHAO Xiao-mei; WANG Hong-mei; YANG Wei; LONG Ming-hua

College of Agriculture,Guangxi University，Nanning，Guangxi 530005

Keywords:

Ca ²⁺ ; watermelon seedling; growth; photosynthetic characteristics; enzyme activity

PACS:

S 651

DOI:

-

Abstract:

Take the‘Zaojia(8424)’watermelon as materials，the effects of different Ca ²⁺ concentrations on the growth，photosynthetic characteristics，protective enzyme activity of watermelon seedling in nutrient were studied.The results showed that the growth of watermelon seedlings was slow in 0~50 mg/L of Ca ²⁺ ，but POD and SOD activity were significantly higher than that in other treatments.The growth rate and plant height was the best at 220 mg/L of Ca ^2+.In the treatment of 190 mg/L of Ca ²⁺ ，leaf numbers，fresh weight，dry weight，root length，net photosynthesis rate（Pn），stomatal conductance（Gs），intercellular carbon dioxide concentration（Ci）and chlorophyll content of seedlings were significantly higher than that in other treatments.It could be concluded that within 0~220 mg/L of Ca2+，it could promote the plant growth，improve photosynthesis and increase the synthesis and accumulation of organic matter if Ca ²⁺ in nutrient was improved.

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