尾叶桉无性系施肥6年的生长效应  

THE GROWTH EFFECT OF FERTILIZATION ON 6 YEARS OLD CLONE PLANTATION OF EUCALYPTUS UROPHYLLA

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,广州510520 [2]中国林业科学研究院林业研究所

出　　处：《广东林业科技》2003年第1期1-5,共5页Forestry Science and Technology of Guangdong Province

基　　金：世行贷款国家造林项目 ( 1991~ 1995 );森林资源发展保护项目 ( 1996~ 2 0 0 0 )"主要树种丰产林施肥技术研究与推广"课题 ( 90 -0 8);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：尾叶桉无性系施肥 6年试验结果表明 :施肥对尾叶桉无性系具有显著的增产效益和经济效益。不同施肥处理的尾叶桉无性系生长的差异极显著 ,而所有施肥处理的生长均极显著大于对照。最佳的施肥处理为每公顷施N 75kg、P2 O52 0 0kg和K2 O 5 0kg ,最佳的施肥配比 ,N、P、K的比例为 1.5∶4∶1,其 6年生平均树高、胸径和蓄积生长量分别为 16 .0 2m ,11.4 5cm和 12 1.8m3/hm2 ,比不施肥 (对照 )分别增加 2 3% ,6 1%和 175 % ,比施肥量最大的处理分别增加 7.5 0 % ,14 .0 4 %和 4 0 .97%。最佳施肥处理的经济效益也极显著 ,6年生砍伐获纯利为 6 432 .95元 /hm2 ,投入与产出比为 1∶2 .2 3,内部收益率为 2 1.4 % ;其所获纯利分别是不施肥处理和施肥量最大处理的 15 .14倍和 2 .5 1倍。The fertilization effect on young clone plantation of Eucalyptus urophylla at 6 years old was studied in the paper. The results showed that there are significant benefits of increasing yield and economy for the early fertilizer to young clone plantation of E. urophylla . There are extremely significant differences on growth of E. urophylla clone among 8 fertilizer treatments. Compared with no fertilizer treatment, all of fertilizer treatments have extremely significant differences on growth. The best fertilizer treatments is to apply 75 kg of N, 200 kg of P 2O 5 and 50 kg of K 2O per hectare, which is the best combination of N,P,K with a proportion of 1.5∶4∶1. The mean height, mean DBH and mean volume of the best fertilizer treatment at 6 years old are 16.02 m,11.45 cm and 121.8 m 3/hm 2 respectively, which increase respectively 23%, 61% and 175% than no fertilizer treatment, and respectively 7.50%, 14.04% and 40.97% than fertilizer treatment with the most fertilizer. The best fertilizer treatment also has significant economic benefit at 6 years old with a net profit of 6432.95 yuan/hm 2, a ratio for input and output of 1 to 2.23 and the internal rate of return (IRR) of 21.4 %, the net profit of which is respectively 15.14 times and 2.51 times than that of no fertilizer treatment and treatment with the most fertilizer.

关 键 词：经济效益 尾叶桉 无性系 施肥 生长效应 

分 类 号：S792.39[农业科学—林木遗传育种]