| 摘要: |
| 为了揭示氮磷钾 (NPK) 配比施肥对交趾黄檀 Dalbergia cochinchinensis 生长和根系发育的影
响, 筛选 NPK 施肥的最佳配方, 以交趾黄檀一年生实生苗为试验材料, 采用 “3414” 试验设计开展 3 因
子 4 水平配方施肥盆栽试验, 比较不同处理下交趾黄檀幼苗生长及根系形态的变化。 结果表明: 不同配比
氮、 磷和钾肥对苗高和茎、 叶、 总生物量的影响差异性极显著或显著, 但对主根长、 根表面积、 一级侧根
数量的影响无显著性差异; 氮肥和磷肥对地径、 根直径、 叶面积、 根生物量的影响差异性极显著或显著;
磷对苗高、 地径, 茎和叶生物量、 叶面积、 主根长、 根表面积、 一级侧根数量的影响大于氮和钾; 磷和氮
对高径比、 根直径的影响程度相当且均大于钾; 氮对根生物量、 总生物量的影响程度大于磷和钾。 根据主
成分分析和苗木质量指数综合评价结果可知, T6 ( N2P2K2 )、 T7 ( N2P3K2 )、 T10 ( N2P2K3 )、 T11
(N3P2K2 ) 均是较为适宜交趾黄檀幼苗生长的施肥组合。 施肥能够促进交趾黄檀幼苗生长。 交趾黄檀幼苗
生长的最佳施肥配方为 N3P2K2 , 施用量分别为 300, 80, 70 mg·株-1
, 即氮的施用量处于较高水平, 磷
和钾的施用量处于中等水平时对交趾黄檀幼苗的生长及根系发育效果最好。 |
| 关键词: 交趾黄檀 配比施肥 生长特性 主成分分析 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目“南方重要珍贵树种高效培育技术研究与示范”(2020KJCX007) |
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| The Effects of Different Fertilization Treatments on Growth Characteristics of Dalbergia cochinchinensis |
|
He ting qing1, Hong Zhou2, Xu Daping2, Mai Baoying1, Luo Mingdao1, Peng Fangren3
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1.Gaoming District Forestry Science Research Institute;2.Research Institute of Tropical Forestry, Chinese Academy of Forestry;3.Nanjing Forestry University
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| Abstract: |
| To reveal the effects of nitrogen, phosphorus and potassium (NPK) formula fertilization on the
growth and root development of Dalbergia cochinchinensis, the optimal formula for NPK fertilization was selected to provide technical support for the seedling breeding of D. cochinchinensis. Using 1 - year - old D. cochinchinensis seedlings as materials, 3414 orthogonal experimental design was used to study effects of different fertilization treatments on growth and root morphology characteristics of D. cochinchinensis seedlings.
There were highly significant or significant differences in the effects of nitrogen, phosphorus, and potassium
fertilizers on seedling height, stem, leaf, and total biomass. However, there was an insignificant difference in
their effects on the main root length, root surface area, and number of primary lateral roots. There were highly
significant or significant differences in the effects of nitrogen and phosphorus fertilizers on ground diameter, root
diameter, leaf area, and root biomass. The influences of phosphorus on seedling height, ground diameter,
stem and leaf biomass, leaf area, main root length, root surface area, and number of primary lateral roots
were greater than that of nitrogen and potassium. The influences of phosphorus on seedling height, ground diameter, stem and leaf biomass, leaf area, main root length, root surface area, and number of primary lateral
roots were greater than those of nitrogen and potassium. The influences of phosphorus and nitrogen on height-to
-diameter ratio and root diameter were equivalent, which were greater than those of potassium. The impacts of
nitrogen on root biomass and total biomass were greater than those of phosphorus and potassium. According to
the result of principal component analysis and comprehensive quality evaluation, the treatment of T6 (N2P2K2 ),
T7 (N2P3K2 ), T10 (N2P2K3 ), and T11 (N3P2K2 ) were all suitable fertilization combinations for the growth
of D. cochinchinensis seedlings. The growth of D. cochinchinensis seedlings could be promote by fertilization
with nitrogen, phosphorus and potassium. The optimum fertilization formula for the growth of
D. cochinchinensis seedlings is N3P2K2 (300 mg N per plant, 80 mg P per plant and 70 mg K per plant). The
growth and root development of D. cochinchinensis seedlings was the best with a high level of N application and
a moderate level of P and K application |
| Key words: Dalbergia cochinchinensis fertilization growth characteristics principal component analysis |
