干旱区生态环境知识资源中心(Arid): 不同土壤水分处理对疏叶骆驼刺幼苗光合特性及干物质积累的影响

Arid

	不同土壤水分处理对疏叶骆驼刺幼苗光合特性及干物质积累的影响
其他题名	Effects of Different Soil Moisture Treatments on the Photosynthesis and Dry Matter Accumulation of Alhagi sparsifolia Seedlings
	张晓蕾; 曾凡江; 刘波; 刘镇; 安桂香; 孙旭伟
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:4 页码:649-655
中文摘要	为探讨土壤含水量变化对疏叶骆驼刺(Alhagi sparsifolia Shap.)幼苗生长发育的影响, 于2008年7~10月, 在塔克拉玛干沙漠南缘绿洲外围设置了土壤水分控制下限为田间持水量的80%(T-80, 下同)、60%(T-60)和40%(T-40)3种灌溉梯度. 结果表明: 土壤水分状况对骆驼刺幼苗的光合特性及干物质积累均有显著影响. 随着土壤含水量的增加, 骆驼刺幼苗气孔导度增大, 蒸腾速率也随之增加, 同时水分利用效率降低; 而净光合速率和叶绿素含量则随着土壤含水量的增加呈先增加后降低的趋势, 干物质积累也有相似的变化趋势, 与T-60相比, 高水分条件(T-80)和低水分条件(T-40)下骆驼刺幼苗叶片的叶绿素含量降低, 净光合速率下降, 同时干物质积累减少, 根冠比和根质比也有不同程度下降. 说明适宜的土壤水分有利于骆驼刺幼苗的生长发育, 土壤含水量过高和过低都会限制其光合能力, 减少生物量积累及地下分配的比例, 最终对其生长发育产生不利影响.
英文摘要	In this study, an experiment of three irrigation gradients, i.e. the minimum field moisture capacities of 80%, 60% and 40% (T-80, T-60 and T-40), was carried out during the period from July to October 2008 so as to reveal the effect of different soil moisture treatments on the growth, photosynthesis and dry matter accumulation of the seedlings of Alhagi sparsifolia Shap. in the southern marginal zone of the Taklimakan Desert, Xinjiang, China. The results show that the photosynthesis and dry matter accumulation of Alhagi sparsifolia seedlings were obviously affected by soil moisture content; both transpiration rate and stomata conductance of Alhagi sparsifolia seedlings were increased with the increase of soil moisture content, but the water use efficiency was decreased; the net photosynthetic rate and chlorophyll content of Alhagi sparsifolia seedlings were increased at first and then decreased with the increase of soil moisture content, and the change trend of dry matter accumulation of Alhagi sparsifolia seedlings was similar, that is, the chlorophyll content, net photosynthetic rate and dry matter accumulation of Alhagi sparsifolia seedlings were decreased under the field moisture capacities of 80% and 40% than those under the field moisture capacity of 60%, and both the root-shoot ratio and root-mass ratio were also decreased in varying degrees. These reveal that the moderate soil moisture content could promote the growth of Alhagi sparsifolia seedlings, but too high or too low soil moisture content could restrict the photosynthesis capability and dry matter accumulation of Alhagi sparsifolia seedlings.
中文关键词	疏叶骆驼刺(Alhagi sparsifolia Shap.) ; 土壤水分 ; 叶绿素 ; 光合特性 ; 干物质 ; 塔克拉玛干沙漠
英文关键词	Alhagi sparsifilia soil moisture content chlorophyll photosynthesis dry matter accumulation Taklimakan desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3919846
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225083
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	张晓蕾,曾凡江,刘波,等. 不同土壤水分处理对疏叶骆驼刺幼苗光合特性及干物质积累的影响[J]. 中国科学院新疆生态与地理研究所,2010,27(4):649-655.
APA	张晓蕾,曾凡江,刘波,刘镇,安桂香,&孙旭伟.(2010).不同土壤水分处理对疏叶骆驼刺幼苗光合特性及干物质积累的影响.干旱区研究,27(4),649-655.
MLA	张晓蕾,et al."不同土壤水分处理对疏叶骆驼刺幼苗光合特性及干物质积累的影响".干旱区研究 27.4(2010):649-655.