南京林业大学学报（自然科学版）Issue(2)：86-92,7.DOI:10.3969/j.issn.1000-2006.2014.02.017
长三角地区典型树种杉木液流速率变化特征
The variation characteristics of sap flow of Chinese fir in the Yangtze River Delta
摘要
Abstract
This study was designed to analyze the changing rules of the sap flow rate of Chinese fir( Cunninghamia lan-ceolata) based on the 12 months continuous located observation of the sap flow rate and environment factors by using sap flow meter and ECH2O system from February 2012 to January 2013 in Dongshanqiao Forest Farm of Nanjing. The results indicated that the sap flow rate of Chinese fir showed distinct diurnal changing rhythms both in sunny and cloudy days in different seasons. The change of the sap flow showed a single-peak curve. The crest values of the sap flow rate in spring, summer, autumn and winter were 0. 71-1. 44, 1. 45-3. 49, 0. 55-1. 91 and 0. 30-0. 85 kg/h, respectively. The crest value of summer was the highest, that of the winter was the lowest. The greater rainfall, the earlier the sap flow rate starting and the higher peak, the longer of impact. In winter, the sap flow rate increased rapidly when it rained, after the rain the sap flow rate would decrease soon. In summer, the sap flow rate would show obvious rise in the daytime after the rain, and in the later days it would decrease gradually to the original level. There existed seasonal differences for the main environmental factors that influenced the sap flow rate. The main environmental factors of spring, summer, autumn and winter were VPD(0.884), air relative humidity(-0.882), VPD(0.798) and solar radiation in field (0.621). Soil temperature was an important environmental factor that influenced the average daily sap flow rate of Chinese fir.关键词
杉木/液流速率/降雨/环境因子Key words
Chinese fir/sap flow rate/rainfall/environmental factors分类
农业科技引用本文复制引用
刘鑫,张金池,汪春林,庄家尧,韩诚,顾哲衍,杨志华..长三角地区典型树种杉木液流速率变化特征[J].南京林业大学学报（自然科学版）,2014,(2):86-92,7.基金项目
国家林业公益性行业科研专项重大项目（201104005）；国家自然科学基金项目（31170663）；江苏高校优势学科建设工程资助项目 （）
