ISWC OpenIR  > 水保所知识产出(1956-2013)
黄土丘陵区油松、沙棘生长旺盛期树干液流 密度特征及其影响因素
温杰1; 陈云明2,3; 唐亚坤2,3; 吴旭3; 谢育利3; 崔高阳3
2017
Source Publication应用生态学报
Volume28Issue:3Pages:763-771
Abstract

使用热扩散探针法( TDP) 监测黄土丘陵区2015 年7—9 月人工林中油松和沙棘树
干液流密度( Js
) 的动态变化,并通过植物的水分利用生理特征判断2 个树种的水分利用类型.
结果表明: 油松和沙棘的Js
在降水前后均表现为单峰型日变化特征,油松生长旺盛期的Js
( 12.62 mL·m-2·s-1 ) 显著高于沙棘( 2.60 mL·m-2·s-1 ) .2 个树种Js
与光合有效辐射、水蒸
汽压差、土壤体积含水量( SWC) 呈显著正相关.8 月和9 月降水前后,2 个树种的Js
都主要受
气象因素影响.9 月降水导致SWC 对沙棘Js
的解释量增加4.2%,而8 月和9 月的降水导致
SWC 对油松Js
的解释量均降低了0.3%.油松中午叶片水势显著高于沙棘且变异系数( 7.3%)
低于沙棘( 11.7%) ,而沙棘具有较高的叶片气孔导度,因此可以判断出油松属于恒水型植物,
沙棘属于变水型植物.

Other Abstract

The dynamic changes of sap flow density ( Js
) of Pinus tabuliformis and Hippophae rhamnoides
in plantations from July to September in 2015 was monitored through thermal dissipation
probe in the hilly region of the Loess Plateau. In addition,plant physiological characteristics were
analyzed to determine the water use types of these two species. The results indicated that the daily
changes of Js of P. tabuliformis and H. rhamnoides showed a single peak during both pre-and postprecipitation.
The Js of P. tabuliformis in growing season ( 12.62 mL·m-2·s-1 ) was significantly
higher than that of H. rhamnoides ( 2.60 mL·m-2·s-1 ) . The Js of these two species were significantly
positively correlated with photosynthetic active radiation,vapor pressure deficit,soil volumetric
water content ( SWC) . The Js of these two species were mainly influenced by meteorological factors
during pre-and post-precipitation in both August and September. The contribution of SWC to Js
of H. rhamnoides increased by 4.2% after precipitation in September,but the contribution of SWC
to Js of P. tabuliformis decreased by 0.3% after precipitation in both August and September,respectively.
Meanwhile,P. tabuliformis showed significantly higher water potential in midday leaf,but
lower coefficient of variation ( 7.3%) than H. rhamnoides with the coefficient of variation of 11.7%.However,H. rhamnoides exhibited higher leaf stomatal conductance. Thus,P. tabuliformis and H.
rhamnoides could be considered as isohydry and anisohydry species,respectively.

Keyword液流密度 恒水型 变水型 油松 沙棘
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8505
Collection水保所知识产出(1956-2013)
Affiliation1.西北农林科技大学林学院
2.中国科学院教育部水土保持与生态环境研究中心
3.中国 科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
温杰,陈云明,唐亚坤,等. 黄土丘陵区油松、沙棘生长旺盛期树干液流 密度特征及其影响因素[J]. 应用生态学报,2017,28(3):763-771.
APA 温杰,陈云明,唐亚坤,吴旭,谢育利,&崔高阳.(2017).黄土丘陵区油松、沙棘生长旺盛期树干液流 密度特征及其影响因素.应用生态学报,28(3),763-771.
MLA 温杰,et al."黄土丘陵区油松、沙棘生长旺盛期树干液流 密度特征及其影响因素".应用生态学报 28.3(2017):763-771.
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