| 长沙市郊枫香人工林营养元素生物循环特征 |
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| 引用本文： | 杨丽丽,文仕知,何功秀.长沙市郊枫香人工林营养元素生物循环特征[J].福建林学院学报,2012(1):48-53. |
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| 作者姓名： | 杨丽丽 文仕知 何功秀 |
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| 作者单位： | 中南林业科技大学林学院 |
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| 基金项目： | 中南林业科技大学青年基金资助项目(2009013B);湖南省财政厅科学基金资助项目(20060087) |
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| 摘 要： | 对长沙市郊枫香人工林5种营养元素(N、P、K、Ca、Mg)的养分元素积累与分布和生物循环进行了研究。结果表明,枫香人工林乔木层不同器官养分元素含量以树叶最高,树干最低;各器官中养分元素含量以N和Ca最高,P最低。林下植被层的养分含量比较高,其含量普遍高于乔木层各组分。土壤各层中养分元素含量均以K最高。枫香林生态系统养分总贮量为99 963.181 kg.hm-2,其中乔木层5种元素养分总量为2 049.652 kg.hm-2,占总贮量的2.05%,林下植被与枯落物层二者的养分总量为288.74 kg.hm-2,占总贮量的0.28%。营养元素的年积累量为177.793 kg.hm-.2a-1,以Ca的积累量最大。枫香年吸收量、归还量、存留量分别为335.975、254.590、81.386 kg.hm-.2a-1。营养元素的循环系数为0.750,利用系数为0.179,周转期为8.960 a,循环速率为P>N>K>Ca>Mg。
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| 关 键 词： | 枫香人工林 营养元素 空间分布 生物循环 |
Biological cycling of nutrients in Liquidambar formosana plantation in suburban area of Changsha |
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| YANG Li-li,WEN Shi-zhi,HE Gong-xiu.Biological cycling of nutrients in Liquidambar formosana plantation in suburban area of Changsha[J].Journal of Fujian College of Forestry,2012(1):48-53. |
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| Authors: | YANG Li-li WEN Shi-zhi HE Gong-xiu |
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| Institution: | (College of Forestry,Central South University of Forestry and Technology,Changsha,Hunan 410004,China) |
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| Abstract: | Liquidambar formosana is a deciduous tree which has some basic properties like high adaptability,wide applications and high resistance to drought and the adaptation to poor soil condition.The biological cycling of nutrients in L.formosana are very important for the purpose of better plantation management.In this paper,the accumulation,distribution and biological cycling of 5 nutrient elements(N,P,K,Ca,Mg) in L.formosana plantation in suburban area of Changsha were studied.The results showed that the nutrient content of plantation was different in different organs,highest in the leaves and lowest in the stems.The contents of N and Ca were the highest,and P was the lowest.The nutrient contents of understorey vegetation were higher than those of the trees.In each soil layer,the content of K was observed to be the highest.The total accumulation of nutrients in the plantation was 99 963.181 kg · hm-2,5 elements in the tree layer were 2 049.652 kg · hm-2 while under-storey and litter layer accumulation of both nutrients was 288.74 kg · hm-2 accounting for 0.28%.Nutrients elements annual net accumulations in L.formosana plantation were 177.793 kg · hm-2 · a-1,with the largest accumulation of Ca.The amount of absorption,return and retention of nutrient contents in the plantation were 335.975,254.590,81.386 kg · hm-2 · a-1,respectively.The nutrient utilization coefficient,circulation coefficient and turnaround period were 0.750,0.179 and 8.960 a,respectively,and the cycling speed was: P>N>K>Ca>Mg. |
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| Keywords: | Liquidambar formosana plantation nutrient element distribution biological cycling |
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