思茅松与4种阔叶树混交林的生长及抗松梢螟效果的研究

Study of Growth of Mixed Forests of Pinus kesiya var.langbianensis with Four Broadleaf Species and Resistance to Dioryctria splendidella

思茅松与红木荷、西南桦、冬樱花、喜树4树种不同比例的混交林营造试验结果(2.5年生)表明:在其混交林中思茅松的生长量一般优于纯林。但需控制好思茅松与阔叶树种的比例,否则达不到增产效果。思茅松与西南桦、红木荷等阔叶树种混交(比例适当)有利于减少松梢螟对思茅松的危害,其中思茅松与4树种同时混交,针阔比为2?1时,抗松梢螟效果最佳;与西南桦混交,针阔比采用1?1较好。

The mixed planting experiment of Pinus kesiya var. langbianensis with four broadleaf tree species including Schima wallichii, Betula alnoides, Cerasus cerasoides and Camptotheca acuminata was conducted in Jinggu county of Yunnan province in July 2004. The growth situation of 2. 5 years old plantations showed that by mixed planting with the tested broadleaf tree species, the growth of Pinus kesiya var. langbianensis was better than that of pure forest. However in order to get promising effect of yield increasing, the proportion of Pinus kesiya var. langbianensis and other broadleaf species should be well controlled. Besides, mixed planting is good for decreasing the leaf species noides , the damage of Dioryctria splendidella, Pinus kesiya var. langbianensis mixed plant with all the four broadat the proportion of 2 ： 1 showed the best resistance to Dioryctria splendidella, if mixed with Betula alsuggested proportion was 1 ： 1.