中短轮伐期杨树纸浆林LAI及生物生产力的研究-应用生态学报.PDF

1998 6 9 3 CHINESE JOURNAL OF APPLIED ECOLOGY, Jun. 1998, 9( 3)∃225~ 230 LAI * 方升佐 徐锡增 吕士行 唐罗忠 曹福亮 ( , 210037) LA I , LA I , . , L A I , 3 NL80351 I69 I72; L A I M. Monsi T. Saeki ,0. 818; LA I ,; 4 , , 1111 !h - 2, 500 !h - 2 14 . 3NL80351 , I72 ; Richards . 4 , 1111 833 625 500 !h - 2, 500 625 833 1111 !h - 2. NL80351, I72. LAI Leaf area index and biomass productivity of midand short rotation poplar plantations for pulp timber. Fang Shengzou, Xu Xizeng, Lu Shixing, Tang Luozhong and Cao Fuliang ( Col lege of Forest Resources and Environment , N anj ing Forestry University, N anj ing 210037). Chin . . App l . Ecol . , 1998, 9( 3) : 225~ 230. The study shows that the leaf area index(LAI) of idand short rotation poplar plantations for pulp ti ber was increased with increasing planting density and stand age. A ong the 3 poplar clones tested, NL80351 had thehighest LAI, I72 had thelowest one and I69 was the inter ediate. The relationship between LAI and sunlight penetration rate could be described by ex tinction equation odifiedby M.Monsiand T.Saeki, andthe extinction coefficient was 0. 818. LAI had a close relationship with aboveground annual net bio ass production, which could be expressed by exponential function. There existed a great difference of bio ass productivity and distribution pattern a ong stands with different clones and planting densities at 4 years old. The bio ass productivity of the stand with 1111ste s!h - 2 was thehighest, as 1. 4 ti es as that with 500 ste s!h - 2. NL80351had the highest productivity, and I72 was the lowest. The bio ass accu ulation trend of ste xyle , branch xyle and bark could be described