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1985年3月,采用随机区组设计,分别在永康、缙云和台州营造了6.6ha的薪炭试验林。选用马尾松,胡枝子和马尾松×胡枝子3个栽植因素和0.5×0.5m、0.5×1m和1×1m 3个株行距水平各为区组,每区组重复3次。根据1986年11月的调查资料,马尾松和胡枝子在干燥瘠薄的立地上适应性强,生长良好,均适宜于植苗造林和(?)直播造林。方差分析和多重比较(LSD)的结果表明,在马尾松和胡枝子的混交林中,胡枝子能够促进马尾松的生长。估测胡枝子杆和叶的生物量的回归方程分别是logW_杆=1.64209+0.92413logD~2H和logW_叶=1.46161+0.72908log D~2H。尽管胡枝子的生物量在头2年中平均每丛不到100g鲜重,但是它具有较强的萌生能力,来年通过砍伐,它的生物量将会成倍地增加。另外,由于随着密度的增加,它的生物量也相应地增加,因此,我们能够通过增加密度来提高这种薪炭林的产量。
In March 1985, a randomized block design was used to create a 6.6-ha fire test forest in Yongkang, Jinyun and Taizhou. Three planting factors, Pinus massoniana, Pinus massoniana and Lespedeza notoginseng, and three row spacing of 0.5 × 0.5m, 0.5 × 1m and 1 × 1m were selected as the block group, and each group was repeated 3 times. According to the survey conducted in November 1986, masson pine and Lespedeza both adaptable and well-vegetated on dry and barren land, are suitable for seedling afforestation and direct seeding afforestation. Results of analysis of variance and multiple comparisons (LSD) showed that Lespedeza bungeana was able to promote the growth of masson pine in Pinus massoniana and Lespedeza mixed forest. The regression equations for estimating the biomass of Lespedeza stolonifer leaves and leaves were logW_bar = 1.64209 + 0.92413 logD ~ 2H and logW_leaf = 1.46161 + 0.72908 log D ~ 2H, respectively. Although Lespedeza pubesches average less than 100 g of fresh weight per plexus in the first two years, it has a strong ability to sprout and its biomass will increase exponentially over the coming year by felling. In addition, because of its corresponding increase in biomass as density increases, we are able to increase the production of such fuelwood forests by increasing their density.