猴樟、鹅掌楸对马尾松苗木生理活性的他感效应

用凋落物浸提液生物鉴定的方法，研究了猴樟Cinnamomum bodinieri和鹅掌楸Liriodendron chinense对马尾松Pinus massoniana幼苗生理活性的他感作用。结果表明，两供体植物对受抟光合色素质量分数和质膜相对透性的影响，总体表现为促进作用；对受体光合速率和蒸腾速率的影响，基本表现为抑制效应。对氮、磷吸收的影响两供体表现出低促高抑的作用趋势。而对受体钾元素的吸收，均表现出一定的促进效应。从对受体光合速率的影响看，鹅掌楸可初步作为马尾松伴生树种的选择。图1表3参18

Effects of aqueous extracts of Cinnamomum bodinieri and Liriodendron chinense litter fall on physiological activities of Pinus massoniana seedlings

The allelopathic effects of litter fall of Cinnamomum bodinieri and Liriodendron chinense on the physiological activities of Pinus massoniana seedling were studied by using the biological identification method with litter extract solution. The results indicated that the aqueous extracts of the two broad-leaved tree species promoted the chlorophyll content and cell membrane permeability of the receptor plant but inhibited its photosynthetic rate and transpiration rate. The nitrogen and phosphorus absorption of donor C. bodinieri and L. chinense presented a trend of promotion in low concentration and an inhibition in high concentration; and they both promoted the absorption of the potassium. As far as the photosynthetic rate of P. massoniana seedling is concerned, the L. chinense can be selected as a companied species for P. massoniana. Ch, 1 fig. 3 tab. 18 ref. ]