施肥对尾叶桉MLA无性系幼林生物量及养分含量的影响  

Effects of Fertilization on Biomass and Nutrient Contents of Eucalyptus urophylla cl. MLA Young Plantation

作　　者：梁坤南[1] 周文龙[1] 李贻铨[2] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]中国林业科学研究院林业研究所,北京100091

出　　处：《林业科学研究》2004年第3期327-333,共7页Forest Research

基　　金：世行贷款国家造林项目(1991-1995);森林资源发展和保护项目(1996-2000)"主要树种丰产林施肥技术研究与推广"课题(90 08);广东桉树发展工程"桉树营养诊断与林地改良的研究"内容之一

摘　　要：对建立在广东开平的尾叶桉MLA6年生无性系施肥试验林进行了生物量和养分的测定与分析,结果表明:尾叶桉MLA无性系幼林早期施肥促进了无性系的生长,也促进了生物量的增加。生长最佳的施肥处理N75P200K50,其6年生的生物量最大,地上生物量和树干生物量分别为65 95、54 94t·hm-2,分别是不施肥处理的2 37和2 36倍,分别是最大施肥量处理N75P300K75的1 65倍和1 67倍。通过胸径和树高与生物量建立的回归方程,可预测尾叶桉MLA无性系单株或林分生物量。叶片的N、P、K含量较高,施肥促进了尾叶桉无性系对营养元素的吸收和积累。The biomass and nutrient contents of Eucalyptus urophylla cl. MLA plantation with early-stage fertilizer trial established at Kaiping, Guangdong, were measured and analyzed at 6 year old. The results showed that fertilizer applied at early-stage promoted the growth and increasing of biomass of E.urophylla cl. MLA plantation. The treatment with the best increment at 6 year old had the biggest biomass with the biomass on ground of 65.95 t·hm^(-2) and stem biomass of 54.94 t·hm^(-2), which were respectively 2.37 times and 2.36 times that of no fertilizer treatment, and 1.65 times and 1.67 times that of the treatment with the biggest fertilizer quantity respectively. The single biomass and stand biomass of E. urophylla cl. MLA plantation might be forecasted by the regression equation established through height, DBH and biomass. N, P and K in foliage had bigger nutrient concentrations. Fertilizers applied had promoted to absorb and accumulate to nutrient elements for E. urophylla clone.

关 键 词：尾叶桉 尾叶桉MLA无性系 生物量 养分含量 

分 类 号：S792.39[农业科学—林木遗传育种]