| 引用本文: | 范 川, 黄复兴, 李晓清, 李贤伟, 舒 翔, 李 平.施肥对盆栽香樟幼苗不同根序细根养分的影响[J].广西植物,2015,35(4):507-514.[点击复制] |
| FAN Chuan, HUANG Fu-Xing, LI Xiao-Qing,
LI Xian-Wei, SHU Xiang, LI Ping.Effects of fertilization on nutrient concentrations of different root orders' fine roots in Cinnamomum camphora seedings[J].Guihaia,2015,35(4):507-514.[点击复制] |
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| 施肥对盆栽香樟幼苗不同根序细根养分的影响 |
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范 川1, 黄复兴1, 李晓清2*, 李贤伟1, 舒 翔1, 李 平1
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1. 四川农业大学 林学院 长江上游林业生态工程四川省重点实验室,
四川 雅安 625014;2. 四川省林业科学研究院, 成都 610081
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| 摘要: |
| 以盆栽的1年生香樟实生苗为研究对象,采用指数施肥的方式,测定1～5级细根的C、N、P、K含量,并探讨施肥对香樟幼苗细根养分浓度的影响。结果表明:(1)不同根序细根的全C浓度差异不显著,施肥对细根全C浓度影响不显著(P>0.05);(2)在所有根序中,N、P浓度最高的是1级根,但其K浓度却最低; N、P含量最低的是5级根;(3)细根的N、P含量随着根序的增加呈显著的下降趋势(P<0.05);(4)施N肥能显著增加1～2级细根的N含量,施P肥能显著增加1级根的P含量,N+P肥较之P肥更能提高1级根对P的吸收;(5)C:N:P受根序的影响非常明显,1级根平均为366:16:1,5级根则为807:12:1,而且C:N:P随着根序增加而显著升高,但N:P无显著影响;(6)虽然施肥对细根C含量无影响,但施N肥或N+P肥对1～2级细根中N的含量有显著性增加。综合分析可知,处理9对香樟苗期养分浓度指标影响最为显著,即施肥量为氮素4 g·株-1、磷素4 g·株-1、钾素2 g·株-1时,对香樟幼苗细根的生长发育有较好地促进作用。研究结果可为香樟的速生丰产及资源的高效利用提供理论依据。 |
| 关键词: 香樟 施肥 细根 根序 |
| DOI：10.11931/guihaia.gxzw201403015 |
| 分类号:Q945.12; S792.23 |
| 基金项目: |
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| Effects of fertilization on nutrient concentrations of different root orders' fine roots in Cinnamomum camphora seedings |
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FAN Chuan1, HUANG Fu-Xing1, LI Xiao-Qing2*,
LI Xian-Wei1, SHU Xiang1, LI Ping1
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1. College of Forestry, Sichuan Agricultural University, The Key Laboratory of Forestry Ecological Engineering
of Sichuan Province, Ya'an 625014, China;2. Sichuan Academy of Forestry, Chengdu 610081, China )
1. College of Forestry, Sichuan Agricultural University, The Key Laboratory of Forestry Ecological Engineering
of Sichuan Province, Ya'an 625014, China; 2. Sichuan Academy of Forestry, Chengdu 610081, China)
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| Abstract: |
| Setting one-yearold potted Cinnmomum camphora seedlings as the research object, using exponential fertilization method, we detected the first to the fifth order fine roots C, N and P contents, in order to explore the effects of fertilization on C. camphora seedlings, and to provide a theoretical basis for C. camphor fast growing and efficient use of resources in nurturing process. The results were as follows:(1)C concentrations of the differences orders' fine root were not significant, with the rise of the root order, while C content overall upward trend. Fertilization had no significant effect on the C concentration of fine root(P>0.05);(2)N and P concentrations of first order roots were the maximum, while fifth order roots were the minimum, with the rise of root orders. N and P concentrations significantly decreased(P<0.05);(3)N significantly increased the N content level of the first to the second fine roots, P fertilizer significantly increased the P content of a root, mix of nitrogen and phosphorus fertilizer could improve the root uptake of P;(4)C:N:P had a significant difference in different root orders roots;(5)The first order roots' mean C:N:P was 366:16:1, the fifth order root 807:12:1, with increased root order, C ratio of three kinds of elements increased significantly, while the N:P changed little;(6)Fertilization did not change the proportion of C; however, N fertilizer or mix of nitrogen and phosphorus fertilizer significantly increased the N proportion of the first to second order roots. In conclusion: The treatment 9 pairs of C. camphor on seedling stage indicators impact most significantly. A fertilizer with the nitrogen 4 g·plant-1, the phosphorus 4 g·plant-1 and the potassium 2 g·plant-1, would have significant promote growing for growing and development of fine roots in C. camphor seedlings. |
| Key words: Cinnamomum camphora fertilization fine root root orders |
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