| 摘要: |
| 以棱果花 Barthea barthei 为试验材料，设置 5 种不同基质处理，研究扦插基质对棱果花扦插苗生物量、根系形态特征的影响。结果表明：（1）处理 4（黄心土∶泥炭土 =3 ∶ 1）棱果花扦插苗生根率最高，苗高最大；处理 2（珍珠岩∶泥炭土 =3 ∶ 1）棱果花扦插苗地径最粗。（2）不同基质对棱果花扦插苗的生物量分配格局有较大影响，处理 4（黄心土∶泥炭土 =3 ∶ 1）中苗木生物量、根冠比显著高于其他处理。（3）处理 4（黄心土∶泥炭土 =3 ∶ 1）根长、根表面积最大，处理 1（珍珠岩∶蛭石=3 ∶ 1）、处理 3（泥炭土∶沙子 =1 ∶ 1）中苗木根系直径最大。（4）单株根系直径在 0~0.5 mm 的棱果花根系平均长度最大，根尖数最多，0.5~1 mm 根系表面积最大，根体积最大。不同基质改变了棱果花扦插苗的根系形态特征，对棱果花扦插苗生根及生长早期发育影响显著。 |
| 关键词: 棱果花扦插苗 基质 生物量分配 根系生长 |
| DOI： |
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| 基金项目:长花期特色花卉棱果花新品种选育 |
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| Effect of Substrates on Biomass Allocation and Root Growth of Cuttings in Barthea barthei |
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RONG DAOJUN1, LUO YONGZHI1, XU BIN2, PAN WEN2, ZHANG WEIHUA2, ZHU BAOZHU2, CHEN XINYU2
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1.Guangdong Procincal ShaTau Kok Forest Farm(Wutongshan National Forest Park Mangement Office of Guangdong Province);2.Guangdong Academy of Forestry
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| Abstract: |
| To explore the effect of substrates on biomass allocation and root growth of cuttings in trees, we conducted experiments of Barthea barthei cuttings seedlings. We assessed the traits of 5 substrates on the biomass allocation and root morphology. The results indicated that (1) Treatment 4 had the largest survival rate and height growth. Treatment 2 had the largest ground diameter. (2) Different substrates had great in?uence on biomass allocation of Barthea barthei cuttings seedlings. Treatment 4 had the largest root top ratio. (3) Treatment 4 had the largest root length and root surface area, treatment 1 and treatment 3 had the largest root diameter. (4) It had the largest root length and root tip number in 0-0.5mm, while it had the largest root surface area and root volume in 0.5-1mm. Consequently, substrates could be used to dramatically promote the growth and survival of by improving their root morphology of their roots during early growing stages. |
| Key words: Barthea barthei cuttings seedlings substrates biomass allocation root growth |
