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外源Ca2+对南林895杨扦插苗光合作用及生长的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年06期
Page:
23-27
Column:
研究论文
publishdate:
2010-11-30

Article Info:/Info

Title:
Effects of exogenous Ca2+ on the photosynthesis and the changes of growth in Populus×euramericana Nanlin 895 cuttings
Author(s):
WANG Lei YIN Zengfang* MA Qingying XU Mianfen
College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China
Keywords:
exogenous Ca2+ Populus×euramericana Nanlin 895 photosynthesis
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2010.06.006
Document Code:
A
Abstract:
Using Populus×euramericana Nanlin 895 cuttings as experimental materials, we investigated the effects of exogenous Ca2+ on its growth situations and photosynthetic parameters after foliarspraying at 20 days. The experimental results were that: (1)With the Ca2+ concentration increasing, the Pn, Tr, Gs, Ci in the leaf was presented gradually trends of increase first, and then decrease without exception. The value of Ci would reach to maximum when the concentration of Ca2+ treatment was 20 mg/L. However, the value of Pn, Tr, Gs would reach to the peak when the concentrations of exogenous Ca2+ was 200 mg/L. Compared with the control test, the difference was quite obvious, and it increased by 22.34 %, 57.76 %, 105 %, respectively. (2)The exogenous Ca2+ treatment could promote height of the plant and caliper growth of Populus×euramericana Nanlin 895 cuttings. The otherness was remarkable or extreme noticeable at the side of control test. Thereinto, the stimulative role of 200 mg/L Ca2+ treatment was the best one, and the height and caliper increased by 25.74 %, 70.15 %, separately. In a word, the proper concentration of exogenous Ca2+ treatment could improve the photosynthetic conditions. Consequently, the growth of Populus ×euramericana Nanlin 895cuttings were accelerated effectively.

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Last Update: 2010-12-27