干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区侧柏(Platycladus orientalis)树干液流动态

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	黄土高原半干旱区侧柏(Platycladus orientalis)树干液流动态
其他题名	The sapflow dynamics of Platycladus orientali in the semi-arid Loess Plateau region
	于占辉; 陈云明; 杜盛
ISSN	1000-0933
出版年	2009
卷号	29 期号:7 页码:3970-3976
中文摘要	应用热扩散式树干茎流计(TDP)于2008年4～10月对黄土高原安塞县侧柏人工林树干液流速率进行了连续测定,并对周围气象、土壤水分等多个环境因子进行了同步测定.结果表明:侧柏在不同月份晴天树干液流速率变化具有明显的昼夜节律性,呈单峰曲线;且各月液流速率日均值受土壤供水水平限制总体上呈下降趋势,即4月份最大,为0.00135 cm·s~(-1);10月份最小为0.00011cm·s~(-1);树干液流速率与光合有效辐射、大气温度、水汽压差呈极显著正相关,与相对湿度呈负相关,其相关程度:光合有效辐射＞水汽压差＞大气温度＞相对湿度,并可用线性表达式来估算;侧柏边材面积和地径呈幂指数关系,并以此结合密度估算出样地侧柏人工林的边材面积为4.65m~2,最终估算出侧柏人工林生长季总耗水量为1159.6 t·hm~(-2).
英文摘要	A thermal dissipation probe (TDP) was used to measure the sapflow dynamics of Platycladus orientali in Ansai County on the Loess Plateau of China from April to October, 2008. Soil water content, photosynthetic active radiation (PAR), air temperature, relative air humidity, water vapor pressure deficit (VPD) and wind speed were measured at the same time. The results showed that patterns of diurnal variation of P. Orientalis sapflow velocity on sunny days were similar with a clear pulse creating a single-peak curve; in the case of restricted soil water levels, the daily average sapflow velocity tended to decline over time so that it was greatest in April and the least in October, being 0.00135 and 0.00011cm·s~(-1), respectively; sapflow velocity showed a significant positive correlation with PAR, air temperature, and water VPD, and had a negative correlation with the relative humidity, the correlation coefficients being in the order PAR > VPD > Temperature > relative humidity, so that these linear expressions can be used to estimate it; the sapwood area of P. Orientali and the diameter at ground level were used for an index relationship to obtain an estimate of sapwood in the sample plots, which was 4.65 m~2. Finally, it can be used to estimate the total water consumption used for transpiration by the P. Orientali plantation in the growing season of April- October, which was 1159.6 t·hm~(-2).
中文关键词	黄土高原 ; 侧柏 ; 树干液流 ; 热扩散式探针 ; 气象因子
英文关键词	the Loess Plateau Platycladus orientalis sapflow thermal dissipation probe (TDP) climatic factors
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:3733880
来源机构	中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224059
作者单位	中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	于占辉,陈云明,杜盛. 黄土高原半干旱区侧柏(Platycladus orientalis)树干液流动态[J]. 中国科学院水利部水土保持研究所,2009,29(7):3970-3976.
APA	于占辉,陈云明,&杜盛.(2009).黄土高原半干旱区侧柏(Platycladus orientalis)树干液流动态.,29(7),3970-3976.
MLA	于占辉,et al."黄土高原半干旱区侧柏(Platycladus orientalis)树干液流动态".29.7(2009):3970-3976.