摘要
以实地取样与实验室分析相结合,对甘肃省不同优势树种积累营养物质(N、P、K)进行了研究,并对甘肃省森林生态系统积累营养物质进行价值评估.结果表明:甘肃省森林各优势树种的干物质中N元素平均含量在0.2%～1.20%之间,P元素平均含量在0.04%～0.10%之间,K元素平均含量在0.1%～1.2%之间;甘肃省森林积累营养物质折合为化肥价值总计达25 0074.14万元/a,各优势树种中灌木林积累营养物质的价值最大;单位面积优势树种积累营养物质的价值位于81.28～952.29元/(hm2.a),甘肃省森林平均积累营养物质的价值为429.47元/(hm2.a).
Nutrients accumulation of dominant tree species in Gansu Province were studied,and value of the accumulation was assessed.The results showed that,the average content of N,P and K in the dry matter of each dominant tree species in Gansu Province were 0.2%～1.20%,0.04%～0.10% and 0.1%～1.2%,respectively.The entire nutrients accumulation of forest in Gansu Province amount to chemical fertilizer was up to 2 500.74 million yuan.Nutrients accumulation value of shrub was the highest among all dominant tree species.Nutrients accumulation value of unit area was 81.28～952.29 yuan/hm2 per year.The average nutrients accumulation value of forest in Gansu Province was 429.47 yuan/hm2 per years.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2012年第6期108-113,共6页
Journal of Gansu Agricultural University
基金
国家林业局林业公益性行业科研专项(201104005-07
200904056)
"十一五"国家科技支撑计划重大项目(2006BAD03A0702/wb06)
关键词
森林服务
林木养分
营养积累
价值评估
甘肃
forest service
forest nutrient
accumulation of nutrients
value assessment
Gansu Province
