毛竹天然混交林生物量及经济效益分析

为了衡量和反映毛竹天然混交林的生产力水平和经济效益,对不同林分组成的天然混交林的现存立竹生物量和立木蓄积量进行调查,并测算单位面积产量、产值。结果表明:不同林分组成的天然混交林经济效益均大于纯竹林,其产值比纯竹林增多18.6%~51.3%。其中,8竹1杉1阔混交林的立竹生物量最多,为99 388.4 kg/hm~2,比纯竹林增多24.1%;3竹5松2阔+杉混交林的立木蓄积量最多,达169.051 m~3/hm~2,为纯竹林的52.29倍;4竹4松1杉1阔混交林的单位面积产值最高,为39 219.2元/hm~2,比纯竹林增多51.3%。

Analysis on biomass and economic benefit of bamboo natural mixed forest

In order to measure and reflect the productivity and economic benefits of the bamboo natural mixed forest,the existing stand biomass and volume of different natural mixed forests were investigated,and the unit area yield and output were calculated. Results showed that,the economic benefits of different natural mixed forests were greater than pure bamboo forest,which increased 18.6% ~51.3%than pure bamboo forest. The stand biomass of mixed forest including 8 bamboo 1 fir 1 broadleaf was the greatest,which reached to 99 388.4 kg/hm2 ,increased 24.1% than pure bamboo forest. The stand volume of mixed forest including 3 bamboo 5 pine 2 broadleaf and fir was the greatest,which reached to 169.05 1 m3/hm2 ,increased 52.29 times than pure bamboo forest. The mixed forest including 4 bamboo 4 pine 1 fir 1 broadleaf had the highest output value per unit area,which was 39 219.2 yuan/hm2,increased 51.3% than pure bamboo forest.