木麻黄迹地不同更新树种土壤剖面的变化特征及表聚性特征

为筛选出一些较适宜于福建省东南沿海木麻黄轮作或混交树种,研究了福建省长乐市滨海沙地厚荚相思等5个树种的土壤剖面变化及土壤的表聚性特征。结果表明:各树种对林地土壤水分影响不明显;在0～20 cm的土壤层,pH值高低依次为巨尾桉、马占相思、厚荚相思、卷荚相思、木麻黄,与木麻黄林地相比,经t检验,卷荚相思等4个树种的土壤pH值的差异达显著水平;相思类树种林分的土壤养分都大于巨尾桉和木麻黄林下的土壤养分;巨尾桉的全氮量表聚性系数和卷荚相思的全磷表聚性系数分别只有0.26和0.29,不具有表聚性特征,而其它树种各养分都具有表聚性特征。

Soil Profiles and Soil Surface Gathering Characteristics of Casuarina equisetifolia L. Cut-over Land

In order to select rotation or mixed species of Casuarina equisetifolia L.grown in the southeastern coastal areas in Fujian,changes in soil profile and soil surface gathering characteristics of the five species on coastal sandy soil were studied.The result showed that respective species exhibited no significant effect on forest soil moisture.In the soil layer between 0-20 cm,the rank order of their PH values was Eucalypt,Acacia mangium,Acacia crassicarpa,Acacia cincinnata and Casuarina equisetifolia L.respectively.Compared with the soil of Casuarina equisetifolia L.,the other species exhibited significant effects on pH value by t-test.The result also showed that there was more soil nutrients in Acacia tree species soil than in Eucalypt and Casuarina equisetifolia L.soil.The total N surface gathering coefficient of Eucalypt was 0.26,while the total P surface gathering coefficient of Acacia cincinnata was 0.29,which was not characterized by surface gathering,while soil nutrients in the other species were characterized by surface gathering.