尾巨桉和厚荚相思人工林土壤肥力及其差异  

Soil Fertility Characteristics and Differences between Eucalyptus urophylla×E. grandis and Acacia grasscape Plantation

作　　者：阳永泉[1] 温远光[1] 何斌[1] 梁宏温[1] 朱宏光[1] 

机构地区：[1]广西大学林学院,南宁530004

出　　处：《林业科技开发》2010年第2期31-33,共3页China Forestry Science and Technology

基　　金：广西自然科学基金项目"良种桉;相思树速丰林凋落物性质及其对土壤肥力影响的研究"(编号:0640018);广西教育厅科技基金(2006)

摘　　要：对广西国营高峰林场界牌分场相似立地条件下尾巨桉和厚荚相思人工林土壤的物理和化学性质进行了测定，旨在研究尾巨桉和厚荚相思的生长对土壤肥力的影响。结果表明：厚荚相思人工林的土壤非毛管孔隙度、毛管孔隙度、自然含水量、非毛管持水量、毛管持水量及最大持水量均高于尾巨桉，其具更高的土壤通透、保水和供水性能，但差异不显著（P=0．31—0．97）；除速效钾外，尾巨桉人工林土壤有机质和养分元素含量均小于厚荚相思人工林。差异显著性检验结果表明：20—40cm土壤有机质差异极显著（P=0．01），而在0—20cm土层中，土壤有机质、pH值、全磷、全氮等差异均不显著（P=0．11—0．99）；厚荚相思人工林对土壤的改良作用优于尾巨桉人工林。The soil physical and chemical properties in the Eucalyptus urophyUa × E. grandis and Acacia grasscapa Plantations with the similar site conditions were studied to clarify the impacts of the growth of E. grandis × E. urophylla and A. grasscapa on the soil fertility in the Gaofeng Forest Farm of Guangxi. The results showed that the soil non-capillary porosity, capillary porosity, capillary holding capacity and maximum water holding capacity in the A. grasscapa plantation were higher than those in the Eucalyptus urophylla x E. grandis plantation, although there were not significant differences （ P = 0.31 - 0.97） between them. The soil organic matter and soil nutrients （ except for the available K） in the Eo grand/s × E. urophylla plantations were less than those of Acacia grasscapa plantation. And the statistical analysis indicated that the soil organic matter had a significant difference（ P =0.01 ）inthe soil depth of 20 -40 cm between the two plantations, while in the soil depth of 0 -20 cm, the soil organic matter, pH value, total P and total N had not significant differences （P =0.11 - 0.99）. Comprehensively, it was found that A. grasscape plantations were superior to E. grandis × E. urophylla plantations on improving the soil fertility.

关 键 词：尾巨桉 厚荚相思 人工林 土壤肥力 

分 类 号：S792.39[农业科学—林木遗传育种]