桉树-米老排异龄混交林对桉树生长和土壤理化性质的影响  

Effects of Mixed Eucalyptus and Mytilaria laosensis of Different Age on Eucalyptus Growth and Soil Physicochemical Properties

作　　者：邱峙嵩 张磊 覃炫霖 胡耀铭 赵英伟 刘正兴 QIU Zhisong;ZHANG Lei;QIN Xuanlin;HU Yaoming;ZHAO Yingwei;LIU Zhengxing(Guangxi Zhuang Autonomous Region State-owned Dongmen Forest Farm,Chongzuo 532108,Guangxi,China;Guangxi Zhuang Autonomous Region State-owned Weidu Forest Farm,Laibin 546100,Guangxi,China)

机构地区：[1]广西壮族自治区国有东门林场,广西崇左532108 [2]广西壮族自治区国有维都林场,广西来宾546100

出　　处：《桉树科技》2025年第1期16-22,共7页Eucalypt Science & Technology

基　　金：广西自筹经费林业科技项目(桂科2022ZC第8号);广西科技基地和人才专项项目(桂科AD23049002)。

摘　　要：为了解桉树纯林间伐后不同混交模式对林分生长和土壤理化性质的影响,以点状间伐桉树后套种米老排形成的混交林(F1)和带状间伐桉树后套种米老排形成的混交林(F2)为研究对象,并以桉树纯林为对照(CK),分析林分生长并比较0~20、20~40、40~60 cm土层土壤理化性质。结果表明:F2模式中,桉树的平均胸径和平均树高显著高于F1和CK;F2在0~20 cm的土壤容重显著低于F1和CK,最大持水量显著高于F1和CK;F1和F2在各土层的有机质、全氮、全磷、全钾、碱解氮、速效钾、有效磷含量高于CK(除F1在0~20 cm土层的全钾和有效磷),土壤pH值变化范围为4.07~4.49。点状间伐后混交米老排可以更加有效地保持土壤有机质含量,带状间伐后混交米老排更能降低土壤容重,提升土壤的最大持水量和增强土壤的蓄水能力。In order to understand the effects of different mixed patterns on stand growth and soil physical and chemical properties of pure Eucalyptus plantations after thinning,the mixed forest(F1)formed by interplantingMytilarialaosensis after spot thinning of Eucalyptus and the mixed forest(F2)formed by interplantingM.laosensis after strip thinning of Eucalyptus were taken as the study objects,and pure Eucalyptus plantations were taken as control(CK).The soil physical and chemical properties of 0-20,20-40 and 40-60 cm soil layers were compared.The results showed that the mean DBH and mean tree height of Eucalyptus in F2pattern were significantly higher than those in F1 and CK.The bulk density of F2 in 0-20 cm soil was significantly lower than that of F1 and CK,and the maximum water holding capacity was significantly higher than that of F1 and CK.The organic matter,total nitrogen,total phosphorus,total potassium,alkali-hydrolyzed nitrogen,available potassium and available phosphorus of F1 and F2 in each soil layer were higher than CK(except the total potassium and available phosphorus of F1 in 0-20 cm soil layer),and the soil pH value varied from 4.07 to 4.49.After spot thinning,mixed M.laosensiscould maintain soil organic matter more effectively,and after strip thinning,mixed M.laosensiscould reduce soil bulk density,increase soil maximum water holding capacity and enhance soil water storage capacity.

关 键 词：桉树 混交林 米老排 土壤理化性质 

分 类 号：S714.2[农业科学—林学]