题目

英语翻译
不同混交比例巨桉+红椿人工林水土保持效益评价
摘 要：以川中南低山丘陵区一年生巨桉人工林为研究对象,建立不同混交比例巨桉+红椿人工林径流小区,观测土壤水分与养分的流失状况,观测期间径流量变化范围为2.45~13.55L/m2,各元素流失量变化范围为C：30.110 mg/L*m2、K：26.88.7mg/L*m2、Fe：31.70.1mg/L*m2、Ca：27~52.7mg/L*m2、Mg：21.45.6mg/L*m2、Zn：13.31.8mg/L*m2、Mn：10.24.3mg/L*m2、Cu：8.13.6mg/L*m2,结果表明不同径流场的地表径流量与土壤养分流失量均呈现出8:2混交林≈6:4混交林＜4:6混交林＜2:8混交林＜巨桉纯林＜红椿纯林的规律,说明当巨桉株数在混交林分中占到60%~80%时,巨桉+红椿人工林的水土保持效益最佳.
关键词：巨桉人工林 红椿 土壤养分 水土保持效益
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提问时间：2021-04-01

答案

Topic:different ratio of mixed plantations of Eucalyptus grandis + toon evaluation of soil and water conservation benefits
Abstract:Sichuan hilly area of South Africa annual study of Eucalyptus grandis plantation,create a different ratio of mixed plantations of Eucalyptus grandis + toon runoff plots,observed the loss of soil moisture and nutrient status,observed during the runoff varied from 2.45 to 13.55L/m2,loss of the elements ranges from C:30.9 110 mg / L * m2,K:26.7 88.7mg / L * m2,Fe:31.4 70.1mg / L * m2,Ca:27 52.7 mg / L * m2,Mg:21.4 45.6mg / L * m2,Zn:13.2 31.8mg / L * m2,Mn:10.5 24.3mg / L * m2,Cu:8.4 13.6mg / L * m2,The results show that the different runoff of surface runoff volume and soil nutrient loss showed mixed ≈ 6:4 8:2 mixed