摘要
研究了福州鼓山次生的南亚热带季风常绿阔叶林及其林缘不同层次１３种植物叶热值、灰分含量及营养成分。结果表明：群落的不同层次平均灰分含量从低到高依次是乔木层（６．７％ ）、草本层（８．５％ ）、灌木层（１０％ ）；平均含灰分热值（ＧＣＶ）从低到高低次是草本层（１６．８９ＫＪ／ｇ）、灌木层（１７．７５ＫＪ／ｇ）、乔木层（１９．７９ＫＪ／ｇ）；平均不含灰分热值（ＡＦＣＶ）从低到高依次是草本层（１８．５５ＫＪ／ｇ）、灌木层（１９．７２ＫＪ／ｇ）、乔木层（２１．１９ＫＪ／ｇ）。氮的平均含量从低到高依次是乔木层针叶林（０．８２％ ）、林缘草本植物芒萁（０．８９％ ）、林缘灌木桃金娘（０．９０％ ）、林内草本层（１．３４％ ）、乔木层阔叶树（１．５５％ ）、林内灌木层（１．８４％ ）；磷的平均含量从低到高依次是林缘灌木桃金娘（０．１８％ ）、林内灌木层（０．２１％ ）、乔木层针叶树（０．２３％ ）、林内草本层（０．２５％ ）、乔木层阔叶树（０．２７％ ）；钾的平均含量乔木层针叶树最低（０．４２％ ），林内灌木层最高（２．２２％ ）。钠、钙、镁在群落的各层次中没有明显变化规律。进而分析了影响植物热值的原因及其植物热值与营养成分的关系。
The calorific values,ash contents and nutrient compositions in the leaves of the secondary southern subtropical monsoon evergreen broad leaved forest and 13 forest edge plants on Gushan Mountain in Fuzhou were studied.The rank order of the average ash contents in the leaves were shrub layer(10.0%)>herbaceous layer(8.5%)>tree layer(6.7%).The mean gross calorific values(GCV)increased from the herbaceous layer(16.89 KJ/g),to the shrub layer(17.75 KJ/g) and to the tree layer (19.79 KJ/g).The ash free calorific value(AFCV)was the highest in the tree layer,the second highest in the shrub layer and the lowest in herbaceous layer.They were 21.19,19.72 and 18.55 KJ/g,respectively.For the average nitrogen content,it increased from the coniferous trees of tree layer(0.82%),to the forest edge herbaceous plant Dicranopteris dichotoma (0.89%),to the forest edge shrub plant Rhodomyrtus tomentosa (0.90%),to the inner forest herbaceous plants(1.34%),to the broad leaved trees of the tree layer(1.55%) and to the inner forest shrub plants(1.84%).The average phosphorus contents were 0.18,0.21,0.23,0.25,and 0 27% for the forest edge shrub plant Rhodomyrtus tomentosa, the inner forest shrub plants,the coniferous trees of tree layer,the inner forest herbaceous plants and broad leaved trees of the tree layer,respectively.As for the potassium content,the highest was inner forest shrub plants(2.22%),and the lowest was the coniferous trees of tree layer(0.42%).There was no obvious variation in the sodium,calcium and magnesium contents in the leaves of various layers in the community.The relationships between calorific values and nutrient contents and the factors influencing the calorific values were discussed.
出处
《生态学报》
CAS
CSCD
北大核心
1999年第6期832-836,共5页
Acta Ecologica Sinica
关键词
神州
鼓山
季风常绿阔叶林
热值
灰分
营养成分
Gushan Mountain in Fuzhou
monsoon evergreen broad leaved forest
calorific value
ash content
nutrient composition
