杉木林下套种雷公藤试验研究

杉木林下套种雷公藤试验研究结果表明,林下套种雷公藤生长发育较好,植株基径、每丛枝数和单丛干物质重量等明显优于纯雷公藤,而单位面积产量与纯雷公藤相当,经济效益更好。六年生平均基径达1.5 cm,每丛枝数平均11条,每丛干重3.71 kg,分别比纯雷公藤提高25.0%、37.5%和32.97%,产量达28 t/hm2左右。同时,林下套种还有利于提高杉木林分生产力,具有广阔的推广应用前景;坡位、坡向等立地环境因子对雷公藤的生长发育影响较大,坡位以下坡生长最好,坡向以半阴半阳坡生长发育最好。

Study on Experiment of Cunninghamia lanceolata Interplanted with the Tripterygium wilfordii under Stands

The results of experiment of Cunninghamia lanceolata interplanted with the Tripterygium wilfordii under stands showed that the growth of undergrowth interplanting Tripterygium wilfordii was better,its plant basal diameter,each cluster count and a single clump of dry matter weight were significantly better than pure Tripterygium wilfordii,its yield per unit area was the same with that of pure tripterygium wilfordii,but its economic benefits was more better.Six-year Tripterygium wilfordii had average base diameter of 1.5 cm,each clump count an average of 11 and each clump dry weight of 3.71 kg per plant,increased by 25.0%,37.5% and 32.97% respectively,compared with the pure Tripterygium wilfordii.In addition,its yield reached per hectare of 28 tons.Meanwhile,the forest interplanting was also beneficial to improve the Cunninghamia lanceolata productivity,and had broad application prospects.The growth of Tripterygium wilfordii was greatly influenced by slope position and aspect,in the best growth of downslope and semi-shaded slope.