干旱区生态环境知识资源中心(Arid): 岩溶石漠化区四种牧草植物光合生理适应性特征

Arid

	岩溶石漠化区四种牧草植物光合生理适应性特征
其他题名	The photosynthetic characteristics of four forage grasses in Karst rock desertification areas
	韦兰英; 曾丹娟; 张建亮; 尤业明; 焦继飞; 黄玉清
来源期刊	草业学报
ISSN	1004-5759
出版年	2010
卷号	19 期号:3 页码:212-219
中文摘要	以类玉米、紫花苜蓿、菊苣和杂交狼尾草4种牧草植物为研究对象, 通过测定其叶片结构性状、光合生理特征以及土壤理化特性, 研究其对岩溶石漠化环境的生理适应性的差异。结果表明, 4种牧草植物的叶面积(LA)、叶干重(DW)、叶绿素含量(Chl)和比叶面积(SLA)差异显著, 反映出4种牧草植物叶片结构性状差异种间较大；同科植物类玉米和杂交狼尾草光合能力相近, 而不同科植物如菊苣和紫花苜蓿光合能力差异较大, 但其水分利用效率(WUE)和潜在水分利用效率(WUEi)相近；相比较而言, 类玉米和杂交狼尾草具有较强的光合能力和较高的水分利用效率, 而菊苣和紫花苜蓿的光合能力和水分利用效率相对较低。4种牧草对0～10和10～20 cm土层土壤含水量的影响差异不大, 但对土壤容重的影响存在差异。相关分析表明, 4种牧草植物蒸腾速率(T_r)与0～10 cm土层土壤含水量为显著的正相关关系, 而10～20 cm土层土壤含水量对大气饱和蒸汽压亏缺(V_(pdl) )影响较大。相比较而言, 类玉米和杂交狼尾草具有较高的P_n, WUE和WUEi, 对岩溶环境具有良好的适应性。
英文摘要	The photosynthetic and leaf traits of four grasses (Zea diploperennis, Medicago sativa, Cichorium intybus, and Pennisetum americanumPurpureum ) were studied in field conditions, together with soil water content and soil bulk density to clarify their physiological adaptability to the Karst rocky desertification environment. There were significant differences of leaf area (LA), dry matter(DW), Chl, specific leaf area (SLA) among these four forage grasses. Zea diploperennis had the greatest LA and DW, while M. sativa had the lowest. SLA was in the sequence C. intybus〉 M. sativa〉 Z. diploperennis〉 P. americanumPurpureum. M. sativa had the most Chl but there were no obvious differences of Chl between the other three forage grasses, indicating the great differences of the leaf structural traits among these four forage grasses. Z. diploperennis and P. americanumPurpureum had high P_n, but low T_r and g_s and therefore large WUE and WUEi, but C. intybus and M. sativa were the opposite. Th is indicated that the intrafamily species Z. diploperennis and P. americanum Purpureum had similar photosynthetic capacities, while the interfamily species C. intybus and M. sativa had significantly different photosynthetic capacities, even though they shared similar WUE and WUEi. There was no significant difference in water contents in the 0-10 and 10-20 cm soil layers below these four forage grasses, showing that they had little effect on soil water content. However, these different grasses did affect soil bulk density. Correlation analysis showed a significant positive correlation between Tr and water content in the 0-10 cm soil layer for all grasses, and the water content of the 10-20 cm soil layer greatly affected their V_(pdl). Comparatively, Z. diploperennis and P. americanum*Purpureum had greater P_n, WUE and WUEi, indicating better adaptability to the Karst environment.
中文关键词	牧草 ; 比叶面积 ; 光合速率 ; 生理适应性 ; 岩溶石漠化区
英文关键词	forage grasses specific leaf area (SLA) photosynthesis physiological adaptation Karst rock desertification area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3901806
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224753
作者单位	广西壮族自治区中国科学院广西植物研究所, 桂林, 广西 541006, 中国
推荐引用方式 GB/T 7714	韦兰英,曾丹娟,张建亮,等. 岩溶石漠化区四种牧草植物光合生理适应性特征[J],2010,19(3):212-219.
APA	韦兰英,曾丹娟,张建亮,尤业明,焦继飞,&黄玉清.(2010).岩溶石漠化区四种牧草植物光合生理适应性特征.草业学报,19(3),212-219.
MLA	韦兰英,et al."岩溶石漠化区四种牧草植物光合生理适应性特征".草业学报 19.3(2010):212-219.