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Response of Two Herbaceous Plants in the Photosynthetic Physiological and Biochemical Characteristics to Cement Content in Vegetation Concrete Matrix(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2020 01
Page:
1-8
Research Field:
Articles
Publishing date:

Info

Title:
Response of Two Herbaceous Plants in the Photosynthetic Physiological and Biochemical Characteristics to Cement Content in Vegetation Concrete Matrix
Author(s):
WANG Ji1 CHEN Fangqing1** TANG Biao2 XU Jianxin2& WEI Xin1
1 Hubei International Scientific and Technological Cooperation Center of Ecological Conservation and Management in the Three Gorges Area, Yichang 443002, China
2 Techand Ecology & Environment CO. ,LTD., Shenzhen 518040, China
Keywords:
vegetation concrete matrix cement content Agropyron cristatum (L.) Gaertn Elymus nutans Griseb. photosynthetic characteristics physiological and biochemical
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.04027
DocumentCode:

Abstract:
Objectives: The cement content in vegetation concrete matrix was the most important impact factor influencing slope stability and plant growth. Methods: The response of two herbaceous, Agropyron cristatum (L.) Gaertn and Elymus nutans Griseb in photosynthetic physiological and biochemical characteristics to the concrete content in vegetation concrete matrix were tested to determine whether they could be used for the concretes biotechnical slope (CBS) technology in the alpine and subalpine permafrost regions of southwestern China. Results: The results showed that the photosynthetic physiological and biochemical characteristics of the two herbaceous plants were significantly affected by cement content in vegetation concrete matrix. With the increase of cement content, the Pn of A. cristatum and E. nutans firstly increased and then decreased, highest values appeared in 6% and 8% cement treatment groups, which were 1.45 times and 2.39 times of the control group, respectively. Similar trends were found on C s and Ci. The light energy utilization efficiency (LUE) and water use efficiency (WUE) decreased first and then decreased with the increase of cement content, and A. cristatum had the largest in the 6% cement treatment group, which were 2.13 times and 1.45 times of the control group, respectively. Whereas E. nutans had the largest in the 8% cement treatment group , , which were 2.39 times and 2.34 times of the control group, respectively. The content of chlorophyll, proline and soluble sugar also firstly increased and then decreased with the increase of cement content. Conclusions: The synthetical analysis and comparision of the two herbaceous plants in photosynthesis physiological and biochemical characteristics indicated that the highest tolerated content of E. nutans and A. cristatum was 6-10% and 4-8%, respectively. The adaptation of E. nutans to cement acceptance is higher than that of A. cristatum. In conclusion, A. cristatum and E. nutans are suitable candidates in the application of CBS for the ecological restoration of slops in the alpine and subalpine permafrost regions of southwestern China, the appropriate cement content should be selected according to requirement of slope stability.

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Last Update: 2019-06-19