论文部分内容阅读
在北亚热带江苏南京地区引种珍稀树种福建柏表明,苗期(1～2a)不耐寒,在-4～-7℃自然低温下有轻、中度冻寒发生。3年生后无明显冻害。幼龄期适应性较强,无明显病虫害、寒害及旱害。无论苗期和幼龄期生长均低于南亚、中亚热带南部原产地。在中山陵风景区疏林郁闭度0.65～0.75的林下,异龄复层混交,8a时能形成3.00～3.50m的亚乔木林冠;在郁闭度0.65的湿地松疏林内,也能形成5.00m高的下层林冠,达到风景林增层、增绿的林相改造效果。林内道路绿化侧方混交表明,在0.40～0.50郁闭度条件,下层福建柏树高达5.00～6.00m,胸径8.0～10.0cm,树冠冠幅达2.80～3.50m,生长较佳。
The introduction of rare species in Nanjing, northern subtropical Jiangsu Province, Fujian cypress showed that the seedling (1 ~ 2a) is not cold-tolerant, cold and moderate cold at -4 ~ -7 ℃ natural low temperature occurs. After 3 years no obvious frost damage. Young age adaptability, no obvious pests, chills and drought. Both the seedling stage and young stage growth were lower than those of South Asia and the southern subtropics. In the middle of Sun Yat-sen scenic area, the forest density of 0.65-0.75 mulch can be mixed with different ages and stratification, and the height of 3.00-3.50m canopy trees can be formed at 8a. In the sparse forest of canopy density 0.65, 5.00m high under the canopy, to the scenic forest afforestation, green forest transformation effect. The lateral afforestation in the afforestation road shows that under the conditions of canopy density from 0.40 to 0.50, the cypress trees in Fujian reach 5.00 ~ 6.00m and DBH 8.0 ~ 10.0cm, crown width 2.80 ~ 3.50m, the growth is better.