不同土壤培肥处理对桂南桉树产量及土壤肥力的影响  

Effects of Different Fertilizing Treatments on Yield and Soil Fertility of Eucalypt Plantations in Southern Guangxi

作　　者：覃祚玉[1] 石媛媛[1] 赵隽宇 唐健[1] 邓小军[1] 宋贤冲[1] 黎巍 Qin Zuoyu;Shi Yuanyuan;Zhao Junyu;Tang Jian;Deng Xiaojun;Song Xianchong;Li Wei(Guangxi Forestry Research Institute,Guangxi Research and Development Center for New Forestry Fertilizer,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002,China;Guangxi State-owned Dongmen Forest Farm,Fusui,Guangxi 532108,China)

机构地区：[1]广西壮族自治区林业科学研究院广西林用新型肥料研发中心广西优良用材林资源培育重点实验室,广西南宁530002 [2]广西壮族自治区国有东门林场,广西扶绥532108

出　　处：《广西林业科学》2021年第5期522-528,共7页Guangxi Forestry Science

基　　金：广西创新驱动发展专项资金项目(桂科AA17204087-11);广西科技基地和人才专项(桂科AD17129051);广西林业科技推广示范项目(gl2017kt15)。

摘　　要：为解决桂南地区桉树高代次纯林投入产出比逐年提高及土壤酸化严重、有机质含量和土壤肥力下降等问题,采用林下套种山毛豆(Tephrosia candida)和田菁(Sesbania cannabina)(T1和T2)、剩余物还林(T3)、施用有机肥(T4)、测土配方施肥(T5)和常规施肥(CK)6种不同处理,研究不同处理下桉树人工林产量和土壤肥力的变化,综合评价各处理对桉树人工林的影响。结果表明,T1~T5处理下,除T5处理的平均树高增量外,桉树的平均胸径、树高和蓄积增量较CK处理均有一定程度的提升。T1处理的桉树平均蓄积增量最大,其次为T5处理。T1、T2、T3和T5处理均能提高人工林土壤有机质含量和土壤肥力,T4处理对土壤有机质含量和肥力的短期促进效应不显著。在实际生产过程中,林下套种绿肥和剩余物还林处理在可操作性和适用性上欠佳,施用有机肥和测土配方施肥处理是广西桉树人工林林地生产力提升和土壤提质增效的较好选择。In order to solve problems of increase of input-output ratio year by year,soil acidification,decrease of soil organic matter and soil fertility in high generation pure eucalypt plantations in southern Guangxi,chang⁃es of yield and soil fertility in six different treatments were studied,including interplanting Tephrosia candida(T1),interplanting Sesbania cannabina(T2),residue to woodland(T3),applying organic fertilizer(T4),soil test⁃ing formula fertilization(T5)and regular fertilization(CK),and effects of different treatments on eucalypt planta⁃tion were comprehensively evaluated.Results showed that except for average tree height increment of T5 treat⁃ment,increments of average DBH,average tree height and average accumulation of eucalypt in T1-T5 treat⁃ments were improved to a certain extent compared with CK treatment.Average accumulation increment of euca⁃lypt in T1 treatment was the largest,followed by T5 treatment.Soil organic matter content and soil fertility of plantations were improved in T1,T2,T3 and T5 treatments,and short-term effect of T4 treatment on improve⁃ment of soil organic matter and soil fertility was insignificant.During actual production process,treatments of interplanting green manure plants and residue to woodland were bad in operability and applicability,and treat⁃ments of applying organic fertilizer and soil testing formula fertilization were suitable choices to promote produc⁃tivity and soil quality of eucalypt plantations in Guangxi.

关 键 词：培肥处理 蓄积量 土壤肥力 桉树人工林 

分 类 号：S792.39[农业科学—林木遗传育种] S714.8[农业科学—林学]