尾叶桉实生林施肥6a试验研究  

Research on Young Seedling Plantation of Fertilizer Trialfor Eucalyptus urophylla at 6 Yearold

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》2002年第6期644-653,共10页Forest Research

基　　金：世行贷款国家造林项目(1991 1995年);森林资源发展和保护项目(1996 2000年)"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：本文是对尾叶桉实生林施肥试验6a的生长、生物量、养分含量和经济效益进行全面的总结。结果表明:施肥对尾叶桉幼林具有极明显的增产效应,6年生施肥处理与不施肥处理间的树高、胸径和每公顷材积生长的差异达极显著。施肥处理的树高、胸径和材积生长比不施肥处理的分别提高了34.76%、56.80%和206.59%,尤其是施肥最佳处理9(树高13.17m,胸径13 73cm和材积141 1m3·hm-2)分别提高了41.77%、78.54%和290.86%。该试验中N、P、K的最佳施肥配比为2∶3∶1。施肥既提高了尾叶桉的生长量,也增加了尾叶桉各组分的生物量,促进了尾叶桉对各种营养元素的吸收和积累。此外,合理施肥还可获得可观的经济效益。最佳施肥处理9,6年生时获纯利达9946.84元·hm-2,是不施肥处理的9.58倍,其投入产出比达2.74,内部收益率为32.33%。The results on growths, biomass, nutrient contents and economic benefit of young seedling plantation for Eucalyptus urophylla at 6 yearold by applying fertilizer were comprehensively summed up. The results showed that there was high significant increasing effect for young seedling plantation of E. urophylla. There were also high significant differences on growths of height, DBH and per hectare volume at yearold between fertilizer treatment and no fertilizer treatment. Compared with no fertilizer treatment, fertilizer treatment on growths of height, DBH and per hectare volume increased by 34.76%, 56.80% and 206.59% respectively. Especially in No. 9 treatment (N100P150K50) with the mean height of 13.17 m, mean DBH of 13.73 cm and mean volume of 141.1 m3·hm2, it increased by 41.77%, 78.54% and 290.86% respectively. The best fertilizer combined ratio for N, P and K is 2∶3∶1. Fertilizer application can increase both the growths and biomass of each part for E. urophylla plantation. Fertilizer application also promoted absorb and utilization of each nutrient element for E. urophylla. In addition, reasonable fertilizer application also attained the considerable economic benefit. The net profit of No. 9 treatment with a total of 9 946.84 RMB·hm2 at 6 yearold was 9.58 times than that of no fertilizer treatment. A ratio of input and output and a IRR for No. 9 treatment (N100P150K50) are 1 to 2.74 and 32.33% respectively

关 键 词：实生林 尾叶桉 施肥效应 生物量 养分含量 经济效益 生长 

分 类 号：S792.39[农业科学—林木遗传育种]