| 摘要: |
| 为研究不同育苗基质对短枝木麻黄 Casuarina equisetifolia 无性系水培生根小苗的生长和根系发
育的影响, 以椰糠、 泥炭、 蛭石和黄心土为材料, 设计了 7 种基质配方, 以黄心土为对照, 8 个月后测定
各指标。 结果表明, 基质 C 组合 (椰糠 ∶ 蛭石 = 1 ∶ 2) 持水能力强, 基质 E 组合 (泥炭 ∶ 蛭石 = 1 ∶ 1)
总氮含量最高, 有利于苗木的生长和根系发育。 不同配比的基质对苗高、 地径、 地上生物量和地下生物
量均有显著的影响 (P＜0. 05)。 除对照外, 基质 E 培育的苗高、 地上生物量显著高于其他基质组合, 分
别比基质 A 组合 (椰糠) 高 55. 29%和 34. 71%。 基质 E 地径也优于其他基质, 比基质 A 高出 42. 63%。
根长、 根系平均直径、 根系表面积和根系体积在不同基质中均达到显著差异水平 (P＜0. 05), 基质 C 培
育的木麻黄苗的根长和平均直径高于其他基质, 基质 B 组合 (椰糠 ∶ 蛭石 = 1 ∶ 1) 中根系表面积和体积
显著高于其他基质。 根据无性系苗的生长性状和根系性状进行综合评价结果, 基质 E 组合是较为理想的
短枝木麻黄无性系育苗基质。 |
| 关键词: 短枝木麻黄 基质 苗木生长 根系发育 |
| DOI： |
| 分类号: |
| 基金项目:广东省财政项目 (2021—2023) “木麻黄种质资源收集保存技术研究”。 |
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| Effects of different substrate composing ratio on growth and root development of clonal Casuarina equisetifolia seedlings |
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huang yongquan1, xu xiuyu2, meng jingxiang3, zhang yong3, wei yongcheng3, GU Qiaoyun4, WEI Meiman4
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1.Forest Resources Conservation Center of Guangdong Province;2.Guangdong Academy of Forestry;3.Research institute of Tropical Forestry, Chinese Academy of Forestry;4.Guangdong Provincial Forest Resources Conservation Center
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| Abstract: |
| To study the effects of different seedling substrates on the growth and root development of Casuarina equisetifolia clones in hydroponics, seven substrate formulations were designed with coconut chaff, peat,
vermiculite and yellow soil as the materials, and yellow soil as the control. After 8 months, the indexes were
measured. The results showed that the combination of substrate C ( coconut chaff ∶ vermiculite = 1 ∶ 2) had
strong water-holding capacity, and the combination of substrate E (peat ∶ vermiculite = 1 ∶ 1) had the highest total nitrogen content, which was beneficial to the growth and root development of seedlings. Different ratios of
substrates had significant effects on seedling height, ground diameter, aboveground biomass and underground biomass (P＜0. 05). Except for the control, the seedling height and aboveground biomass growing in substrate E
were significantly higher than those in substrate A (coconut chaff) by 55. 29% and 34. 71%, respectively. The
ground diameter of substrate E was also better than that of others substrates, which was 42. 63% higher than that
of substrate A. Root length, average root diameter, root surface area and volume all showed significant differences in the eight substrates (P＜0. 05). The root length and average diameter of seedlings cultivated in substrate C were higher than those in other substrates. In substrate B (coconut chaff ∶ vermiculite = 1 ∶ 1), the root
surface area and volume were significantly higher than those in other substrates. According to the comprehensive
evaluation results of the growth traits and root traits of clonal seedlings, the matrix E combination is an ideal
seedling substrate for C. equisetifolia clones. |
| Key words: Casuarina equisetifolia growing substrates seedling growth root development |
