| Suitable soil water content of several kinds of shrub in project area of returning farmland to forests in Datong, Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2007.04.23 |
| Key Words: soil water content photosynthesis rate transpiration rate water use efficiency |
| Author Name | Affiliation | | ZHU Yan-yan | College of Soil and Water Conservation in Beijing Forestry University, Key Lab of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | HE Kang-ning | College of Soil and Water Conservation in Beijing Forestry University, Key Lab of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | TANG Dao-feng | College of Soil and Water Conservation in Beijing Forestry University, Key Lab of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | GONG Yu-xia | College of Soil and Water Conservation in Beijing Forestry University, Key Lab of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China |
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| Abstract: |
| In this paper, physiological parameters of Atriplex canescens, Lycium barbarum and Hippophae rhamnoides in different water condition in the field and under the condition of water menace were measured, and the relation among photosynthesis rate, stomatal conductance, transpiration rate, water use efficiency and soil water content was studied. The result shows optimum soil water content keeping max net photosynthesis rate of Atriplex canescens, Lycium barbarum and Hippophae rhamnoides were 18.88%，17.41%，18.49%, Optimum soil water content keeping better leaf water use efficiency of the three shrub were 10.58%，15.3%，12% respectively. Soil water compensation point for hydration of the three kinds of shrub were 4.3%，4.4%，4.54%. The suitable soil water content for transpiration rate of the three shrubs were 21.25%，22.49%，21.64% respectively. So as we know, the suitable soil water content of this three shrub Atriplex canescens were 10%～12%， Lycium barbarum were 10%～15.5%， Hippophae rhamnoides is about 10.5%. |
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