摘要
于2019-2023年,在福建省三明市沙县区高砂镇林场开展毛红椿与杉木不同比例混交及不同密度造林试验,研究混交树种的树高、地径、胸径、冠幅、单株立木材积和林分蓄积等生长性状的早期效果.结果表明,5年生的毛6杉4、初植密度为3330株·hm-2(株行距2m×1.5m)的混交林中,毛红椿树高、地径、胸径、冠幅、单株立木材积和林分蓄积、林分总蓄积量均最高,分别达 6.97 m、8.77 cm、7.13 cm、3.10 m、0.0173 m3、34.60 m3·hm 2、48.03 m3·hm-2,比平均值高出38.84％、21.30％、25.09％、42.86％、88.04％、1.66倍、1.01倍;杉木的树高、单株立木材积和林分蓄积均最高,分别达5.33 m、0.0173 m3、34.68 m3·hm-2;比平均值高出 22.53％、1.08 倍、2.18 倍.毛 2 杉 8、初植密度 2505 株·hm-2(株行距 2 m× 2 m)的混交林中,杉木的地径、胸径和冠幅均最高,分别达10.67 cm、8.17 cm、2.67 m,分别比平均值高出52.60％、52.36％、47.33％.结果表明,在毛红椿与杉木混交造林时,宜用较大密度种植,初始造林密度适合在2505～3330株· hm-2;且相应加大毛红椿的比例.
Abstract
Early growth effects of the growth characters of height,diameter,diameter breast height,maximum crown width,stand vol-ume per tree and stand volume were studied by mixed afforestation experiment of Toona ciliate var.pubescens and Chinese fir.The re-sults showed that after four years afforestation,the ratio of T.ciliate var.pubescens and Chinese fir was 6∶4,and the height and diame-ter,dbh,maximum crown width,stand volume per tree and stand volume of T.ciliate var.pubescens were the highest at 2 m × 1.5 m,they were 6.97 m,8.77 cm,7.13 cm,3.10 m,0.0173 m3,34.60 m3·hm-2 and 48.03 m3·hm-2 respectively,which were 38.84％,21.30％,25.09％,42.86％,88.04％,1.66 times and 1.01 times higher than the average.The height,stand volume per tree and stand volume of Chinese fir were the highest,which were 5.33 m,0.0042 m3 and 34.68 m3·hm-2 respectively,which were 22.53％,1.08 times and 2.18 times higher than the average.The diameter at ground,diameter breast height and the maximum crown width of Chinese fir in the mixed forest with 2 m × 2 m of plant and row spacing were the highest,which were 10.67 cm,8.17 cm and 2.67 m respectively,which were 52.60％,52.36％and 47.33％higher than the average respectively.The total volume of the stand with 2 m × 1.5 m spacing was the largest.In the mixed afforestation of T.ciliate var.pubescens and Chinese fir,the planting density should be larger,and the initial planting density was at 2505～3330 trees·hm-2.The proportion of T.ciliate var.pubescens and Chinese fir should be increased in the mixture of T.ciliate var.pubescens and Chinese fir and Cunninghamia lanceolata
基金项目
福建省科技厅省属公益类科研院所基本科研专项(2019R1009-4)
福建省林业科学研究院自主选题项目(闽林研[2015]73号)
南方山地用材林培育国家林业和草原局重点实验室项目()
维普
万方数据