东北草原区的C3、C4牧草及其生态分布的初步研究

摘要/Abstract

摘要： 本文用RuBPCase活性/PEPCase活性的比值, 鉴定东北草原区牧草资源中C₃、C₄植物。供测定45种中35种为首次鉴定。辅助观察禾草类Kranz结构。在此基础上, 对其中11种C₃、C₄优势牧草的地理分布、物候谱及其相对优势度与土壤pH值和含盐量之间的关系进行了研究。结果表明, C₃植物30种, 隶属于10科24属, C₄植物15种, 隶属于5科9属。与C₃植物相比, 在高温、强光照和降水量大的季节, C₄植物显示其更高的相对生长优势, 在纬度较低和盐碱化区域, C₄植物具有相对分布优势。C.4草相对优势度与土壤pH值和含盐量的相关系数分别为0.826和0.760, 而C₃植物均为负值。

关键词: C₃植物, C₄植物, RuBPCase活性/PEPCase活性, 生态分布

Abstract: C₃ and C₄ forage plants in the Northeast stepps were identified by using the ratio of RuBPCase activity/PEPCase activity. 35 species among the total 45 tested species were first identified. The Kranz structure was observed only for Gramineae plants. On the basis of C₃ or C₄ plants identified, 11 dominant species were selected to study their geographical distribution, phenological spectrum and relationship between their relative dominance and soil pHvalue or salt content. The results showed that there were 30 species of C₃ plants from 24 genera in10 families and 15 species of C₄ plants from 9 genera in5 families. In comparison with C₃ plants, C₄ forage showed a higher relative growth dominance in the season with high temperature, strong radiation and high precipitation and a higher relative distribution dominance at lower latitudes and salt alkalized region. The correlation coefficient between relative dominance of C₄ forage and soil pHvalue, or salt content was 0.826 or 0.760 respectively, but that for C₃ plants was negative.

Key words: C₃ plant, C₄ plant, Activity of RuBPCase/PFP case, Fcelegical distritut

殷立娟, 祝玲. 东北草原区的C₃、C₄牧草及其生态分布的初步研究[J]. 应用生态学报, 1990, 1(3): 237-242.

Yin Lijuan, Zhu Ling . A preliminary study on C₃ and C₄ plants in the Northeast stepps and their ecological distribution[J]. Chinese Journal of Applied Ecology, 1990, 1(3): 237-242.

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东北草原区的C₃、C₄牧草及其生态分布的初步研究

A preliminary study on C₃ and C₄ plants in the Northeast stepps and their ecological distribution

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