浙西南丘陵地八种乡土阔叶树的生长表现

种类繁多的乡土阔叶树种资源,在提供林产品、涵养水源、改良土壤、美化环境等方面起着重要作用。但由于木材加工业和香菇业的过量发展,近几年来,浙西南地区天然阔叶林资源呈急剧下降趋势。这不仅造成林业产业的资源危机,更严重的是导致生态环境的恶化。因此,保护天然林,加速发展人工阔叶林,是摆在林业工作者面前的迫切任务。80年代初,在龙泉市境内采集了具有一定用材和观赏价值的8种乡土阔叶树种子进行育苗,并在城郊的丘陵地上设置造林试验,旨在筛选优良造林树种。现将结果总结如下,供生产单位参考。1　试验地自然条件　　试验地位于浙西南…

Growth Performance of Eight Native Broadleave Species on Hill Country in Southwestern Zhejiang

A species test with 8 native broadleaved species was set up on the hill country, having rather poorer soil conditions,in Longquan City of Zhejiang Province in 1983. After eight years from planting,survival percents of all 8 species were above 95%,but significant growth differences among species were found. Chinese Tupelo ( Nyssa sinensis ) and Axillary Choerospondias ( Choerospondias axillaris ) performed best for height and diameter growth. Sylvestral Elaeocarpus ( Elaeocarpus sylvestrics ),Maudia Michelia ( Michelia maudiae )and Calyxless Sweetqum ( Liquidambar acalycina ) were middle. Huangshan Mountain Magnolia ( Magnolia cylindrica ),Yulan Magnolia ( M.denudata ) and Chinese Tuliptree ( Liriodendron chinensis ) performed poorest. But,second measurment at fifth growth season showed that Sylvestral Elaeocarpus and Maudia Michelia became best,especially for its diameter growth. The growth spead of Chinese Tupelo had decreased,but total growth increment remaind better. While Axillary Choerospondias and Chinese Tuliptree has serious growth degradation,and many trees died. Other three species had lower growth spead.