摘要
为了探究不同经营模式对毛竹林降雨后地表径流及氮磷流失的影响,于2013年1月至2014年10月,通过在浙江安吉县毛竹纯林中种植红豆杉、香榧、红茴香、朱砂根4种经济灌木,建立了不同的毛竹林经营模式;随后测定了毛竹林样地降雨、径流量和径流氮磷浓度等指标。结果表明,15次地表径流事件中,各样地累计径流量为3.06~9.22m3,总氮流失量为总磷的7.6倍,其中铵态氮流失量为硝态氮的2.5倍,但通过林分改造能显著降低铵态氮与硝态氮比例。与毛竹纯林对比,4种林分改造模式两年累计径流对比毛竹纯林减少40.0%~66.8%,累计总磷流失减少64.0%~83.8%,总氮流失减少49.1%~78.8%,硝态氮流失减少37.4%~76.2%,铵态氮流失减少42.8%~80.4%。4种林分改造模式对地表径流流量和氮磷流失的削减作用均为种植红豆杉最好。
In order to determine the reduction of nitrogen and phosphorus losses among different stand improvement patterns,Taxus mairei,Torreyagrandis,Illicium henryi,Ardisia crenata were chosen as four different stand improvement tree species to improve Phyllostachy edulis forest structure,and the volumes of runoff and concentrations of nitrogen and phosphorous were measured from January 2013 to October 2014.Results showed that the total runoff of five forest stands were 3.06-9.22 m^3 in 15 runoff events.The losses of total nitrogen were 7.6 times of the losses of total phosphorus,and the losses of ammonium nitrogen were 2.5 times of the losses of nitrate nitrogen.Stand improvement could reduce the ratio of ammonium nitrogen to nitrate nitrogen.The runoff was reduced by 40.0%-66.8%in these four stand improvement patterns in two years compared with Phyllostachy edulis pure forest.The accumulative losses of total phosphorus were reduced by 64.0%-83.8%in four stand improvement patterns compared with Phyllostachy edulis pure forest,and the corresponding values were 49.1%-78.8% for total nitrogen,37.4%-76.2% for nitrate nitrogen,and42.8%-80.4% for ammonium nitrogen.The Taxus mairei ＋ Phyllostachy edulis forest had greatest reduction effect on runoff and nitrogen and phosphorus losses among four forest stand improvement patterns.
作者
蔡泽宇
张建锋
孙士咏
潘春霞
陈光才
曹旖旎
CAI Zeyu;ZHANG Jianfeng;SUN Shiyong;PAN Chunxia;CHEN Guangcai;CAO Yini(Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang , Zhejiang 311400;Anji Forestry Bureau of Zhejiang Provincei, Anji , Zhejiang 313300)
出处
《水土保持学报》
CSCD
北大核心
2017年第6期46-51,133,共7页
Journal of Soil and Water Conservation
基金
南京中医药大学中央级公益性科研院所基金项目(CAFYBB2016SY009)
浙江省林业厅推广项目(2017B05)
中央级公益性科研院所基金重点项目(RISF2013001)
关键词
林分改造
毛竹
地表径流
氮磷削减
stand improvement
Phyllostachys heterocycla
surface runoff
nitrogen ＆ phosphorus reduction
