木本淀粉能源植物栓皮栎与麻栎的资源调查以及分布规律

为了更好地开发和利用我国的栎类资源,对我国栓皮栎与麻栎进行了全面系统的调查,确定了具体分布范围,并根据分布区内林分的集中程度和类型进行了分布区划,其结论如下:1)栓皮栎与麻栎在我国各省、自治区、直辖市以及两个特别行政区均有资源分布,栓皮栎分布区跨冷温带、暖温带、北亚热带和热带4个气候带,麻栎分布区跨暖温带、北亚热带和热带3个气候带;2)栓皮栎与麻栎在我国的水平分布总体上呈东北、西南走向为直线,东部、南部为沿海岸线的"D"字形分布;3)栓皮栎和麻栎分布区海拔的上、下限与地理纬度相关性较低(R2值分别为0.162 5,0.019 1和0.259 4,0.060 6),而与地理经度间的相关性较高(R2值分别为0.708 5,0.494 1和0.763 5,0.705 0),均随着地理经度的增加其分布区海拔的上、下限均呈现出逐渐下降的趋势;4)栓皮栎集中分布区与麻栎次集中分布区为秦巴山地与陇南山地东部、伏牛山山地、桐柏山与大别山山地北部,以上地区是开发利用这两种栎类资源的理想地区。

Resource Investigation and Distribution Pattern of Quercus variabilis Blume and Quercus acutissima Carr.as Woody Energy Plant in China

Quercus variabilis and Quercus acutissima which distribute widely in China has got a high starch content.The plants have been valued as a non-grain ethanol crop inland.For better exploitation and utilization of Quercus resources,this study made clear the definite distribution regions in China on the basis of a systematic and comprehensive investigation of its resource distribution,and made regionalization according to the forest stand concentrated degree and types.The results are as follows:(1)Q.variabilis and Q.acutissima are distributed in 23 provinces of China.Q.variabilis scatters in cool temperate zone,warm temperate zone,northern subtropics and torrid zone,Q.acutissima scatters in warm temperate zone,northern subtropics and torrid zone.(2)The horizontal distribution of Q.variabilis and Q.acutissima on the whole a straight line on the northeast,southwest direction,along the eastern and southern coastline shaped like "D".(3)The corelation between the altitude threshold of Q.variabilis and Q.acutissima with dimension was poor(R2=0.162,5、0.019 1 and 0.259,4、0.060 6),but was corelated very high with longtitude(R2=0.708,5、0.494 1 and 0.763 5、0.705 0)(both the up limit and the down limit decreased while the longtitude increased).(4)The concentrated area of Q.variabilis and Q.acutissima are Qinba mountaina and east Longnan mountain,Funiu mountain,Tongbo mountain and North Dabie Mountain,which is the best region of development and exploitation of Q.variabilis and Q.acutissima.