半干旱黄土丘陵区五种植物的生理生态特征比较

应用生态学报

半干旱黄土丘陵区五种植物的生理生态特征比较

徐炳成^1,2;山仑¹;李凤民^1,2

¹西北农林科技大学中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;²兰州大学干旱与草地生态教育部重点实验室, 兰州 730000

收稿日期:2006-07-07 修回日期:1900-01-01 出版日期:2007-05-15 发布日期:2007-05-15

Comparison of ecophysiological characteristics of seven plant species in semiarid loess hilly-gully region.

XU Bing-cheng^1,2; SHAN Lun¹; LI Feng-min^1,2

¹State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resource, Northwest A & F University, Yangling 712100, Shanxi, China;²Key Laboratory of Arid and Grassland Ecology of Education Ministry, Lanzhou University, Lanzhou 730000, China

Received:2006-07-07 Revised:1900-01-01 Online:2007-05-15 Published:2007-05-15

摘要/Abstract

摘要： 通过测定陕北黄土丘陵区5种植物在旱季的光合速率、蒸腾速率和叶水势日变化,将植物划分为不同的水分生态适应类型.结果表明:柳枝稷的光合生理特征属于高光合、低蒸腾和高水分利用效率类型,其抗旱适应性特征属于高水势延迟脱水类型；苜蓿属于高光合高蒸腾低水分利用效率类型,耐旱性为高水势延迟脱水型；达乌里胡枝子属于低光合、低蒸腾、低水分利用效率类型,耐旱性为高水势延迟脱水型；白羊草属于高光合、蒸腾较高的水分利用效率中等型,耐旱性属于能忍耐脱水造成的低水势的一类.沙打旺属于高光合中等蒸腾速率中等水分利用效率类型，耐旱性为低水势延迟脱水型.

关键词: Frankia基因型, 高黎贡山, IGS, PCR-RFLP

Abstract: The diurnal course of photosynthetic rate, transpiration rate, and leaf water potential (Ψ_L) of five plant species in North Shaanxi loess hilly-gully region were measured in dry seasons. Based on the daily maximum photosynthetic and transpiration rates, daily total assimilation and transpiration, and diurnal change characteristics of Ψ_L, the test plants were classified into different eco-adaptation types.Panicum virgatum L. had high photosynthetic rate, low transpiration rate and high water use efficiency (WUE), and its drought adaption strategy was to delay dehydration by developing high Ψ_L. Medicago sativa had high photosynthetic and transpiration rates but low WUE, while Lespedeza dahurica had low photosynthetic and transpiration rates and low WUE. Their drought adaptation strategies were the same, namely, by increasing Ψ_L to delay dehydration.Bothriochloa ischaemum had high photosynthetic rate, relative high transpiration rate and medium WUE, and its drought-resistant strategy was to decrease Ψ_L to endure dehydration.Astragalus adsurgens had similar characteristics in diurnal courses of photosynthesis with B. ischaemum, and its drought adaption strategy was to delay dehydration by developing low Ψ_L.

Key words: Genotype of Frankia, Gaoligong Mountains, IGS PCR-RFLP

徐炳成^1,2;山仑¹;李凤民^1,2. 半干旱黄土丘陵区五种植物的生理生态特征比较[J]. 应用生态学报.

XU Bing-cheng^1,2; SHAN Lun¹; LI Feng-min^1,2. Comparison of ecophysiological characteristics of seven plant species in semiarid loess hilly-gully region.[J]. Chinese Journal of Applied Ecology.

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