摘要
2009年在沙湾县国有林场内,以人工云杉林为研究对象,采用室外收集和室内实验的分析方法,对天山中部人工云杉林(Piceaschrenkiana Fisch.et Mey.P.schrenkiana)凋落量及凋落物养分特征进行了研究。结果表明:天山中部人工云杉林凋落量为2 485.14 kg/(hm2.a);凋落物由落叶、落枝、落皮、落果和其他5种组分组成。各组分中以落叶凋落量最大,为1828.37 kg/(hm2.a),占凋落总量比例的73.57%;其次为落枝,凋落量为599.32 kg/(hm2.a),占凋落总量的24.11%;落皮和落果的凋落量相当,分别为15.62,14.29 kg/(hm2.a),仅占凋落总量的0.628%和0.575%;其他组分凋落量为27.55 kg/(hm2.a),占凋落总量的1.108%。人工云杉林凋落量月变化特征呈单峰型,凋落量最大值出现在7月;凋落物中含有大量的矿质营养元素,其中Ca的平均浓度含量在凋落物各种组分中最高,为13.95 g/kg;N的平均浓度含量仅次于Ca,为8.43 g/kg;K和Mg的平均浓度含量相当,分别为3.86和2.92 g/kg。各养分元素含量大小顺序为:Ca>N>K>Mg>P。
The litter mass and nutrients collected from artificial spruce forest of Tianshan Mountains.The results showed that the annual litter size from artificial spruce forest in the middle part of Tianshan Mountains was 2 485.14 kg/（hm2·a）.Forest litter mass contains five components,which included leaves,twigs,barks,fruits,and other five components,among which the litter size of fallen leaves was the greatest with 1 828.37 kg/（hm2·a）,accounting for 73.6% of the total litter size and followed by fallen branches,whose litter size was 599.32 kg/（hm2·a）,accounting for 24.1% of total litter size;The litter size of bark was the same as that of fallen fruit,being 15.62 kg/（hm2·a） and 14.29 kg/（hm2·a） respectively,accounting for only 0.63% and 0.58% of total litter size;The litter size of other components was 27.55 kg/（hm2·a）,accounting for 1.108% of the total litter size.The monthly variation characteristics exhibited single peak.The maximum litter size appeared in July.There were many mineral factors in litter mass,among which the content of Ca in average concentration of various components was the highest,with 13.95 g/kg;The average concentration levels in N was only followed by Ca,with 8.43 g/kg and average concentration content of K was the same as that of Mg which were 3.86 g/kg and 2.92 g/kg respectively.The proper sequence of nutrient concentration were：CaN〉K〉Mg〉P.
出处
《新疆农业大学学报》
CAS
北大核心
2010年第5期385-388,共4页
Journal of Xinjiang Agricultural University
基金
国家林业局公益性行业科研专项(200804022c
200804006/rhh-06)
关键词
凋落物
凋落量
养分含量
人工云杉林
天山
litter
litter size
nutrient content
artificial spruce forest
Tianshan Mountains
