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.
以1/2Hoagland营养液为基础培养液,研究了在0.1%、0.2%、0.4%和0.6% NaCl胁迫条件下,毛红椿[Toona ciliata Roem. var. pubescens （Franch.） Hand.-Mazz.]和水松[Glyptostrobus pensilis （Staunt. ex D. Don） K. Koch]的种子萌发和幼苗生长情况.结果表明,随着NaCl浓度的增加,2个树种的种子萌发率和简化苗木活力指数均明显下降,在0.1%、0.2%、0.4%和0.6% NaCl胁迫条件下, 毛红椿和水松种子的最终萌发率分别为89.3%、87.3%、62.7%、32.0%和26.0%、16.7%、6.0%、3.3%,简化苗木活力指数分别为1.39～0.08和1.52～0.07,且毛红椿的种子萌发率和简化苗木活力指数均明显高于水松.萌发恢复实验结果表明,高浓度NaCl处理后的种子具有较高的萌发恢复率.根据实验结果初步判定毛红椿种子具有较强的耐盐性.
