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.