[1]XUE Pei-pei,WANG Ke-qin,GENG Yang-hui,et al.Effects of Different Soil Moistures on Ecological Physiology Characteristic of Zizyphus mauritiana Lam. in Dry-hot River Valley[J].Research of Soil and Water Conservation,2009,16(05):186-189,193.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 05
Page number:
186-189,193
Column:
Public date:
2009-10-20
- Title:
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Effects of Different Soil Moistures on Ecological Physiology Characteristic of Zizyphus mauritiana Lam. in Dry-hot River Valley
- Author(s):
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XUE Pei-pei1, WANG Ke-qin2, GENG Yang-hui1, LI Yue-wen1
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1. Forest Food Office of Forestry Research Institute of Chongqing, Protection and Restoration of Forest Ecosystems of Three Gorges Reservoir Area in Chongqing Municipal Key Laboratories, Chongqing 400036, China;
2. Southwestrn Forestry University, Kunming 650224, China
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- Keywords:
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dry-hot river valley; photosynthesis rate; transpiration rate; water use efficiency
- CLC:
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S152.7;S665.1
- DOI:
-
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- Abstract:
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In order to guide the cultivation of Zizyphus mauritiana Lam.in dry-hot river valley,and improve the yield.This essay studied the effects of different soil moistures (A,B,C,D were: rate of soil moisture was 40%~55%,55%~70%,70%~85%,85%~100% of field moisture capacity respectively during the whole period of growth) on photosynthesis rate (Pn) and transpiration rate (Tr) of Zizyphus mauritiana Lam.The relationships between soil moisture and Pn,soil moisture and Tr were analyzed,then water use efficiency (WUE) was calculated.The results were gained as follows: (1) The diurnal variation and the seasonal variation of Pn both presented double-peaked curves,and they were highest when rate of soil moisture was 70%~85% of field moisture capacity; (2) The diurnal variation and the seasonal variation of Tr also presented double-peaked curves.They increased as soil moistures increasing,and they were highest when rate of soil moisture was 85%~100% of field moisture capacity.The highest number of diurnal variation was 10.95 mmol/(m2·s),the highest number of seasonal variation appeared in June,and it was 10.2mmol/(m2·s); (3) WUE reached the highest when rate of soil moisture was 55%~70% of field moisture capacity.The highest number arrived at 8:00,was 7.63μmol/mmol,the mean number of seasonal variation was 1.85μmol/mmol.