黑木相思混交对桉树长期轮种林地土壤质量的改良作用研究  

Effect of Mixed Acacia Melanoxylon on Soil Quality Improvement of Eucalyptus Plantation With Long-Term Rotation

作　　者：尚永明 张承就 Shang Yongming;Zhang Chengjiu(State-Owned Sanmenjiang Forest Farm in Guangxi Zhuang Autonomous Region,Liuzhou 545006,Guangxi,China;Lianhua Mountain Protection Center,Liuzhou 545000,Guangxi,China)

机构地区：[1]广西壮族自治区国有三门江林场,广西柳州545006 [2]广西壮族自治区柳州市莲花山保护中心,广西柳州545000

出　　处：《绿色科技》2025年第1期110-113,共4页Journal of Green Science and Technology

摘　　要：本文旨在探讨黑木相思与桉树带状混交对桉树长期轮种林地土壤质量的改良作用,为优化混交模式和桉树林地可持续经营提供参考。本研究在广西壮族自治区国有三门江林场选取桉树长期种植(11年)林地轮作9年后的黑木相思×桉树带状混交林(混交比例为7∶3)和桉树二代林为研究对象。分别在桉树林(CK)、混交林中桉树部分(T1)和黑木相思部分(T2)随机布设3块20m×20m的调查样地,测定土壤物理性质和化学性质,对比分析不同林分土壤质量的差异。结果表明:①土壤物理性质:T2的最大持水量和最小持水量与CK相当,显著高于T1(P<0.05);CK的毛孔持水量显著高于T1和T2(P<0.05);其他指标无显著差异;②土壤化学性质:T1和T2的有机碳含量显著高于CK(P<0.05);全氮和水解氮含量比较为:T2>T1>CK,差异显著(P<0.05);T2的全磷含量显著高于CK和T1(P<0.05);有效磷含量比较为:T1>T2>CK,差异显著(P<0.05);T2的速效钾含量最高,显著高于CK和T1(P<0.05)。指出黑木相思与桉树带状混交对改善桉树长期轮种林地土壤质量具有一定的积极作用,在提高土壤养分含量方面效果显著,对土壤物理性质的改善效果有限,需要进一步研究不同混交比例和长期效应,以优化混交模式。This paper aims to investigates the improvement effect of strip mixed planting of Acaciamelanoxylon and Eucalyptus on soil quality in Eucalyptuslong-term rotation forest land,and provides scientific basis for opti-mizing the mixed planting mode and sustainable management of Eucalyptus forest land.The study focuses on a mixed forest of Acaciamelanoxylon and Eucalyptus strip(with a mixing ratio of 7∶3)and a second-generation Eucalyptus forest,which have been planted with Eucalyptustrees for 11 years and rotated for 9 years in Sanmen-jiang Forest Farm in Guangxi Zhuang Autonomous Region.Three 20 m×20 m survey plots were randomly set up in the Eucalyptus portion(T1)and the Acaciamelanoxylon(T2)of the Eucalyptus forest(CK)and mixed forest,respectively.The soil physical and chemical properties were measured,and the differences in soil quality among different forest stands were compared and analyzed.The results show that:①soil physical properties:the maxi-mum and minimum water holding capacities of T2 were comparable to those of CK,significantly higher than T1(P<0.05);the pore water holding capacity of CK was significantly higher than that of T1 and T2(P<0.05);there was no significant difference in other indicators;②soil chemical properties:the organic carbon content of T1 and T2 was significantly higher than that of CK(P<0.05);the total nitrogen and hydrolyzed nitrogen content showed a trend of T2>T1>CK,with significant differences(P<0.05);the total phosphorus content of T2 was signifi-cantly higher than that of CK and T1(P<0.05);the effective phosphorus content showed a trend of T1>T2>CK,with significant differences(P<0.05);T2 had the highest content of available potassium,significantly higher than CK and T1(P<0.05).It is concluded that the strip mixed planting of Acaciamelanoxylon and Eucalyptus has a certain positive effect on improving soil quality in long-term rotation forests of Eucalyptus.The effect is signifi-cant in increasing soil nutrient content,but the improvement effect on soil physical properties

关 键 词：黑木相思 桉树 长期轮种 土壤质量改良 

分 类 号：S792[农业科学—林木遗传育种]