摘要
探讨桉树专用肥对桉树生长与经济效益的影响,为合理施肥提供依据。以桉树二代萌芽林为研究对象,选取T1-桉宝、T2-南风、T3-七坡、T4-复混肥、CK-不追肥5个处理,分析比较不同施肥处理的肥料效应。结果表明:桉树专用肥能显著提高桉树胸径、树高和单株材积生长量,其中T3效果最佳,分别比CK提高了45.99%、63.77%、56.31%,显著高于T4,而与T1、T2间无显著差异。以T3木材出材量最大(91.46 m^(3)·hm^(-2)),较CK增加了51.21%,其次是T2(91.13 m^(3)·hm^(-2))。结合肥料成本计算,以T2投入产出比最好(1∶2.95),其次是T3(1∶2.88)。桉树林蓄积量的基础地力贡献率均呈现T4和T1显著高于T2和T3,肥料贡献率与之相反,其中肥料贡献率在施肥后3个月以T2最大,而施肥1年后以T3最大,表明桉树林施肥后短期(3个月)以T2肥料效应最佳,能够更快促进桉树生长,而随着时间延长(第1次施肥后1年)以T3肥料效应最佳,持续时间更久。施肥能有效提高桉树人工林生产力,从经济效益和施肥的短期效应来看建议施用南风桉树专用肥,而结合肥料效应的持续性和保持林分生长优势方面建议施用七坡桉树专用肥。
The effects of a eucalypt special fertilizer(ESF)on growth and economic benefit were studied to provide a ba-sis for rational fertilization.For this study,5 treatments of T1-Yanbao(ESF),T2-Nanfeng(ESF),T3-Qipo(ESF),T4-compound fertilizer and CK(no-topdressing)were evaluated to analyze their effects.The results showed that fertiliza-tion could significantly increase the DBH,tree height and individual tree volume growth for eucalypts.Among them,the effect of the T3 treatment was the best,with the averages of these traits being 45.99%,63.77%and 56.31%higher than those of CK respectively,and significantly higher than T4,but not significantly different from treatments T1 and T2.The maximum wood yield of the T3 treatment was 91.46 m^(3)·hm^(-2),which was 51.21%higher than that of CK,followed by the T2 treatment with 91.13 m^(3)·hm^(-2).The input output ratio of the T2 treatment was 1∶2.95,followed by T3 treatment with 1∶2.88.The contribution rate of T4 and T1 treatments to basic soil fertility under the eucalypt plantations was signifi-cantly higher than that of T2 and T3,while the contribution rate of fertilizer was the opposite.The contribution rate of fertilizer was the largest in T2 treatment at 3 months after fertilization,and again largest in T2 treatment after 1 year of fertilization,indicating that the fertilizer effect of T2 treatment was the best in the short term(3 months)and that this fer-tilization could promote the growth of eucalyptus faster than other treatments.With the extension of time(1 year after the first fertilization),the fertilizer effect of T3 treatment was the best and lasted longer.In summary,fertilization can effec-tively improve the productivity of eucalypt plantations,and for optimizing economic benefits and short-term effects of fertilization this study indicates that Nanfeng(ESF)was best,while for optimal fertilizer effect,sustainability and maintenance of forest growth advantages Qipo(ESF)proved to be the best.
作者
零天旺
颜培栋
蒙成杰
覃富健
卢顺熙
陆绍浩
杨章旗
LING Tianwang;YAN Peidong;MENG Chenjie;QIN Fujian;LU Shunxi;LU Shaohao;YANG Zhangqi(Zhenlong Forest Farm of Guangxi,Hengzhou 530307,Guangxi,China;Guangxi Forestry Research Institute/National Forestry and Grass Administration,Masson Pine Engineering Technology Research Center/Guangxi Masson Pine Engineering Technology Research Center/Guangxi Key Laboratory of Fine Timber Forest Resources Cultivation,Nanning 530002,Guangxi,China)
出处
《桉树科技》
2023年第2期73-79,共7页
Eucalypt Science & Technology
基金
广西科技基地和人才专项(桂科AD19254004)
八桂学者专项(2019A026)资助。
关键词
桉树
肥料类型
生长特性
经济效益
肥料效应
eucalypt
fertilizer type
growth characteristics
economic efficiency
fertilizer effect
