摘要
采用固定标准法、标准木法对四川西部林区川西云杉 (Piceabalfouriana)人工林生物量和营养元素含量、贮量等进行研究。结果表明 :在系统植物子室中 ,营养元素总贮量为 12 2 9 5 0 2kg·hm- 2 ,其中乔木层贮量为 949 36 2kg·hm- 2 ,贮量最多 ,占 77 2 2 % ,灌木层、草木层、苔藓层及枯落物层分别为 42 85 6kg·hm- 2 (3 4% )、15 95 1kg·hm- 2 (1 30 % )、15 36 1kg·hm- 2 (1 2 5 % )和 2 0 5 972kg·hm- 2 (16 73% ) ;人工林生态系统 5种大量元素的积累为 2 116 96 0 97kg·hm- 2 ,其中土壤子室为 2 10 493 2kg·hm- 2 ,占系统总贮量的 99 432 % ,植物子室为12 0 2 892kg·hm- 2 ,占系统总贮量的 0 5 6 8% ;比较分析了迹地、人工林及原始林土壤子室的养分状况 ,其养分能够满足人工林的正常生长 ,但密度过大是人工林 2 6年后生长降低的主要原因之一。
The concentration,storage and allocation of nutrient element in Picea balfouriana plantation in west Sichuan forest region were investigated using field investigation, sample tree and plot harvest.The results show that,the total nutrient element storage of plant subventride in system were 1229.502kg·hm -2,the storage in the tree layer was the largest,and constituted 77.22%.the sequence in which storage element varied among different layer was as follows:litter layer (205.872kg·hm -2,16.73%),shrub layer (42.856kg·hm -2,3.4%),herb layer (15.951kg·hm -2,1.30%),bryophyte layer (15.361kg·hm -2,1.25%),respectively.The total nutrient element storage in plantation ecosystem including N\,P\,K\,Ca and Mg,amout to 211696.097kg·hm -2,in which storage in soil subventricle amount to 210493.2kg·hm -2,and constituted 99.432%,the other in plant subventricle amount to 1202.892kg·hm -2,and consitituted 0.568%.After analysing the nutrient situation in soil of the slash,the plantation and the virgin forest,it is put forward that the element storage in soil could meet the needs of normal growth of the plantation, and that the high density of the plantation was one of the main factors causing the decline of the tree growth after the stands 26-year-old.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2001年第4期10-18,共9页
Scientia Silvae Sinicae
基金
国家林业局"九五"重点课题 (96-3 5 )的部分内容
关键词
云杉
人工林
营养元素
含量
贮量
分配
生物量
川西林区
Subalpine,Picea balfouriana, Plantation,Nutrient element, Concentration,Accumulation,Allocation
