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雅安市雨城区森林资源动态变化特征研究

A Study of Dynamic Characteristics of Forest Resources in Yucheng District of Ya'an City

  • 摘要: 本文利用四川省雨城区1995年和2015年两次森林资源规划设计调查数据,分析了雨城区近20年森林资源的变化特征。结果表明:林地面积从1995年的5.46万hm2增加到2015年的7.69万hm2,增加了2.23万hm2;森林覆盖率从43.50%增加到62.46%,增加了19.46个百分点。活立木蓄积从1995年的218.7万m3增加到2015年的525.06万m3,增加了306.3万m3;林地生产力从36.97 m3·hm-2增加到67.99 m3·hm-2,增加了31.02 m3·hm-2。天然林保护和退耕还林工程的实施促进了森林面积、蓄积和森林覆盖率的增加。

     

    Abstract: By using the data of forest resource planning and design inventory in 1995 and 2015,analysis was made of the dynamic change of forest resources in Yucheng District in recent 20 years.The results showed that the area of forest land increased from 546 000 hm2 in 1995 to 769 000 hm2 in 2015,increasing by 223 000 hm2.Forest coverage rate increased from 43.50% to 62.46%,increasing by 19.46%.Living tree volume increased from 21.87 million m3 in 1995 to 525.06 million m3 in 2015,increasing 306.3 million m3.Forest productivity increased from 36.97 m3·hm-2 to 67.99 m3·hm-2,increasing by 31.02 m3·hm-2.Natural Forest Protection Project and Defarming-and-reafforestation Project increased the area,volume and cover rate of the forest.

     

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