| 摘要: |
| 采用原位改良方法，研究了不断根（CK）、单一断根（T1）、断根联合施用改良基质（T2）处
理对广州市海珠区海印桥小叶紫花三角梅 Bougainvillea glabra ‘Royal Purple’ 生长及开花的影响。结果显
示：第 80 天时 T1、T2 处理三角梅叶片全 N 含量均显著低于不断根处理（P<0.05）；与 T1 处理相比，T2
处理三角梅叶片全 N、全 P 含量分别显著增加了 12.37%、29.73%（P<0.05）。此外，T2 处理虽然第 60 天
时未见有开花，但是第 90 天开始花朵密度显著增加（P<0.05），第 210 天时花朵密度达到 90%。相关性
分析结果显示，第 80 天时三角梅叶片 SPAD 值与全 N 含量呈极显著正相关（P<0.01），土壤 pH 与叶片全
P 含量呈显著负相关（P<0.05）。该研究表明，断根处理对三角梅叶片全 N 元素的积累产生了一定的负效
应，而断根联合施用改良基质处理则有利于调控花朵密度。 |
| 关键词: 三角梅 断根 改良基质 根系 花朵密度 |
| DOI： |
| 分类号: |
| 基金项目:广州市科技计划项目（202002020027） |
|
| Effect of Root Cutting and Improvement Substrates Application on Growth of Bougainvillea glabra ""Royal Purple"" in Over-bridge Greening |
|
liu yueming, ye shaoping, li ting, zheng fuhai, zhang juntao, wu chenghou
|
|
Guangzhou Institute of Forestry and Landscape Architecture
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| Abstract: |
| A in-situ root improvement experiment was carried out to study the effects of root cutting (T1)
and root cutting combined with improvement substrates application (T2) treatments on the growth and flowering
of Bougainvillea glabra ""Royal Purple"" on Haiyin Bridge in Haizhu District of Guangzhou, and plants without any
treatment were used as control (CK). The results showed that the leaf total N content of T1 and T2 treatments on the
80th day were both significantly lower than that of CK treatment (P<0.05). Compared with T1 treatment, the leaves
total N and P contents of T2 treatment were significantly increased by 12.37% and 29.73%, respectively (P<0.05).
Additionally, although no flowering was observed on the 60th day in T2 treatment, the flower density increased
significantly from the 90th day (P<0.05), and reached 90% on the 210th day. The results of correlation analysis
showed that the leaf SPAD value was highly significantly positively correlated with the total N content (P<0.01),
while the soil pH was significantly negatively correlated with leaf total P content (P<0.05) on the 80th day. In general,
the root cutting treatment had a negative effect on the leaf total N accumulation of B. glabra, while the root cutting
combined with improvement substrates application treatment was beneficial to regulate the flower density. |
| Key words: Bougainvillea glabra root cutting improvement substrates root flower density |
