【摘要】 在马尾松林下分别套种拉氏栲、青栲、闽粤栲、格氏栲和苦槠,形成针阔混交异龄林.对这5个混交林群落以及马尾松纯林的林地凋落物(包括A00和A0层)进行了收集、取样和化学分析.结果表明,上述6个群落的林地凋落物现存量分别为8448.0、15565.8、11993.7、12718.6、6974.2和5020.0kg·hm-2,其中A00层在各群落中所占比例分别为47.2%、59.6%、51.3%、61.0%、85.4%及86.3%,平均为61.7%.凋落物中各养分元素的含量在群落和组分之间存在明显差异,但总的趋势表现为Ca>N>Mg或K>P.6个群落的林地凋落物中,5种营养元素在A00层中的总含量范围为91.56～210.85kg·hm-2,而在A0层的含量范围为21.95～156.15kg·hm-2.更多还原

【Abstract】 Five unevenaged coniferhardwood forest communities were developed after Castanopsis lamontii,Cyclobalanopsis myrsinaefolia,Castanopsis fissa,Castanopsis kawakamii and Castanopsis sclerophylla,were separately interplanted under the canopy of mature Pinus massoniana plantationsAll the litter in the forest floor(including layers A00 and A0)was collected,sampled and chemically analysed in the above fives mixedspecies communities and also in pure Masson′s pine standThe results showed that biomass of forest litter were,respectively,8 4480,15 5658,11 9937,12 7186,6 9742,and 5 0200 kg·hm-2,of which litter in layer A00 makes up of 472%,596%,513%,610%,854%,and 863% of the total,respectively,averaging 617% Significant differences in nutrient concentrations existed between forest communities and litter components,but the elements consistently revealed the same trend,decreasing in the order:Ca>N>Mg or K>P Total nutrient contents in the forest floor ranged from 9156 to 21085 kg·hm-2 in layer A00,and 2195 to 15615 kg·hm-2 in layer A0更多还原