干旱区生态环境知识资源中心(Arid): 变叶海棠及其伴生植物峨眉小檗的水分利用策略

Arid

	变叶海棠及其伴生植物峨眉小檗的水分利用策略
其他题名	Water use strategies of Malus toringoides and its accompanying plant species Berberis aemulans
	徐庆; 王海英; 刘世荣
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:19 页码:5702-5710
中文摘要	变叶海棠(Malus toringoides)是分布在我国四川省甘孜州炉霍县亚高山地区的野生植物种，其嫩叶可制茶，为一种纯正的天然保健珍品。它根系发达、抗逆性强，也是川西亚高山干旱地区退化植被生态恢复的良好树种。运用氢稳定同位素示踪技术，比较分析了变叶海棠和伴生植物峨眉小檗（Berberis aemulans）茎水与其潜在水源（降水、土壤水和河水）的deltaD值，结果表明：变叶海棠与峨眉小檗植物水主要来源于降水和深层土壤水。生长在河边的变叶海棠并不利用河水。在干季，降水1020 mm后，变叶海棠对降水的利用率为33.50%70.06%，而峨眉小檗为26.17%45.17%；在雨季，降水1025 mm后，变叶海棠对降水的利用率为40.64%69.01%，而峨眉小檗为28.44%71.41%；无论干季还是雨季，两种植物在雨后对降水利用的格局相似，但变叶海棠对降水的利用率皆显著高于峨眉小檗（P＜0.01）。两种植物水分利用策略与其根系分布相一致。为川西甘孜州亚高山干旱地区退化植被生态恢复的树种选择以及变叶海棠的扩繁与利用提供科学理论依据。
英文摘要	Water is often the main limiting factor for plant growth in arid and semi-arid areas. Plants of different life-forms have different water use patterns and strategies, which reflect the balance and interrelationships between species characteristics and water distribution. These water use patterns and strategies may be subject to great variability in response to climate change. Malus toringoides is a native tree species of the sub-alpine arid areas in Luhuo County of Ganzi Region in Sichuan Provence. It is often used for ornamental horticulture because of its beautiful tree form, and for vegetation restoration along dry river valleys and south-facing hillsides in degraded ecosystem because of its well-developed root system and its drought tolerance to water-stressed conditions. M. toringoides also has other commercial values; its young new leaves can be processed to make tea with natural and green nutrients that can be used as health supplement. Berberis aemulans is a shallow root species and lives often in close association with M. toringoides as an accompanying species. The growth and reproduction of M. toringoides are increasingly affected by severe shortage of water in the arid area due to changing climate. Therefore, it is of importance to examine water use patterns of M. toringoides and Berberis aemulans. In this study, we used hydrogen stable isotope composition (delta D) to examine water utilization pattern of M. toringoides and B. aemulans. Stable isotope techniques is considered as an effective tools to help understanding relationships between plants and their environment conditions and provides quantitative information about water use strategies and efficiencies of plants. By comparing delta D value of water in xylem of M. toringoides and B. aemulans with potential water sources (rainfall, soil water, and river water), the results showed that the water utilization source for M. toringoides and B. aemulans was mainly from rain water and soil water from deep layers of the soil profile. M. toringoides did not take up river water even though it grew on river banks. After a rain event of 1020 mm in the dry season, M. toringoides had a precipitation utilization rate of 33.50%70.06%, while B. aemulans was 26.17%45.17%. After a rain event of 1025 mm in the wet season, M. toringoides and B. aemulans had rain utilization rates of 40.64%69.01% and 28.44%71.41%, respectively. The results showed that the utilization rates of precipitation were not significantly different (P >0.05) between the two seasons for either of the two plant species. After rain events, the water use patterns of M. toringoides and B. aemulans were similar regardless of the dry or wet season, and the utilization rate of precipitation of M. ertoringoides was significantly higher than that of B. aemulans (P <0.01). The water use patterns of M. toringoides and B. aemulans were consistent with the distribution patterns of their root systems: well-developed for M. toringoides and shallow for B. aemulans. Consequently, the two species can co-exist in the same vegetation communities. The results can contribute to in-depth understanding of growth, breeding and improvement, propagation of M. toringoides. In addition, we recommend that M. toringoides and B. aemulans be used together for ecological vegetation restoration by taking advantage of their co-beneficial water use strategies with different water sources.
中文关键词	变叶海棠 ; 峨眉小檗 ; 氢稳定同位素 ; 水分利用策略 ; 降水
英文关键词	Malus toringoides Berberis aemulans hydrogen stable isotope water utilization strategies precipitation
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:4355558
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226967
作者单位	徐庆, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 王海英, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 刘世荣, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.
推荐引用方式 GB/T 7714	徐庆,王海英,刘世荣. 变叶海棠及其伴生植物峨眉小檗的水分利用策略[J],2011,31(19):5702-5710.
APA	徐庆,王海英,&刘世荣.(2011).变叶海棠及其伴生植物峨眉小檗的水分利用策略.生态学报,31(19),5702-5710.
MLA	徐庆,et al."变叶海棠及其伴生植物峨眉小檗的水分利用策略".生态学报 31.19(2011):5702-5710.