浙江农林大学学报2011，Vol.28Issue(6)：855-862,8.
模拟轮伐期长短对杉木人工林氮动态的影响
Simulated nitrogen dynamics for a Cunninghamia lanceolata plantation with selected rotation ages
摘要
Abstract
To show nitrogen dynamics for successive rotations of Cunninghamia lanceolata plantations with declining productivity and the affect on sustainable management, the FORECAST model was used to simulate 200 years of growth for Cunninghamia lanceolata plantations with different rotation ages in China. Results suggested that N uptake, N return to the soil, and foliar N content could increase with a longer rotation age. The model showed that soil available N decreased with a 25-year rotation age and then increased with longer rotation ages. With the medium site, the average soil available N was 96.24 kg·hm-2 for a 10-year rotation age, 86.87 kg·hm-2 for a 25-year rotation age, and 96.07 kg·hm-2 for a 50-year rotation age; the average uptake Nwas 49.22 kg·hm -2 for a 10-year rotation age, 58.44 kg·hm-2 for a 25-year rotation age, and 69.07 kg·hm-2 for a 50-year rotation age; and the average return of N to the soil was 26.75 kg · hm-2 for a 10-year rotation age, 44.76 kg·hm -2 for a 25-year rotation age, and 60.74 kg·hm-2 for a 50-year rotation age. The recycled N ratios from the first four rotations were 0.544, 0.766, 0.847, and 0.879. [Ch, 6 fig. 1 tab. 34 ref.]关键词
森林生态学/杉木/轮伐期/氮动态/FORECAST模型Key words
forest ecology/ Cunninghamia lance olata/ rotation age/ nitrogen dynamics/ FORECAST model分类
农业科技引用本文复制引用
辛赞红,江洪,接程月,魏晓华,BLANCO Juan,周国模..模拟轮伐期长短对杉木人工林氮动态的影响[J].浙江农林大学学报,2011,28(6):855-862,8.基金项目
科学技术部重大国际合作项目(200073819) （200073819）
国家重点基础研究发展计划("973"计划)项目(2010CB950702,2010CB428503,2005CB422207,2005CB422208) （"973"计划）
国家高技术研究发展计划("863"计划)项目(2009AA 122001,2009AA12205) （"863"计划）
科技部重大基础性项目(2007FY 110300-08) （2007FY 110300-08）
国家自然科学基金资助项目(40671132) （40671132）
浙江省重大科技专项(2008C13G2100010) （2008C13G2100010）
