生态环境学报2017，Vol.26Issue(10)：1728-1735,8.DOI:10.16258/j.cnki.1674-5906.2017.10.012
南亚热带尾巨桉中龄林水量平衡特征研究
Water Balance Characteristics of Eucalyptus urophylla×E. grandis Middle Aged Plantation in Mid-subtropical Zone
摘要
Abstract
Water balance is an important content of forest ecosystem, however, the data of water balance of eucalyptus plantation is not adequate. To understand water balance characteristics ofE.urophylla×E. grandis plantation ecosystem, the authors monitored data using automatic weather station and flow weir from Jul. 2013 to May, 2016 in Guangxi Nanning Eucalypt Plantation Ecosystem Observation and Research Station (NEES), and applied water balance equation to calculated components of them and analyzed the time dynamic of components of water balance. The results showed that precipitation curve of Nanning District was fit for the rainfall change trend in south China, three yearly precipitation characteristics of NEES from Jul. 2013 to Jun. 2014, from Jul. 2014 to Jun. 2015, and from Jul. 2015 to May, 2016 were also fit for the rainfall change trend of Nanning District and south China, they belonged to normal flow year between high flow year (1352 mm) and low flow year (1156 mm). During twenty four months observing period from Jan. 2014 to Dec. 2015, it was a tiny fluctuation of soil volume water content on daily time scale, but sum of them was almost 0 in the whole year in 2014 and 2015, respectively. The total of runoff during 2 years was 51 mm, and the coefficient of runoff was 1.9%, there was no runoff in the most part of months and it was possible to generate runoff while precipitation was more than heavy rain, runoff in Sep. 2015 was the most and coefficient of runoff was 9.5%. The total of evapotranspiration was 2669 mm which accounted for 98% of sum of rainfall from Jan. 2014 to Dec. 2015, the evapotranspiration was a major part of water output in the E.urophylla×E. grandis middle aged plantation ecosystem. There was a positive significant linear relationship between precipitation and rainfall, however, runoff was imperfect controlled by rainfall.关键词
尾巨桉/土壤储水/径流/蒸散/水量平衡Key words
E. urophylla×E. grandis/soil water storage/runoff/evapotranspiration/water balance分类
农业科技引用本文复制引用
任世奇,项东云,肖文发,陈健波,郭东强,唐庆兰,姜英..南亚热带尾巨桉中龄林水量平衡特征研究[J].生态环境学报,2017,26(10):1728-1735,8.基金项目
广西林业科技项目(桂林科研[2015]第 43 号) （桂林科研[2015]第 43 号）
广西壮族自治区科技重大专项(桂科重 1347001) （桂科重 1347001）
国家重点研发计划项目(2016YFD0600504) （2016YFD0600504）
