| 摘要: |
| 为探究氮质量浓度对盆栽小菊(chrysanthemum×morifolium Ramat.)干物质以及养分吸收的影响，以采取科学合理的施肥方案。本研究以盆栽小菊‘东篱秋心’为研究对象，以珍珠岩为栽培基质，设置不同氮质量浓度处理(40、120、180、240和350 mg/L)进行盆栽试验，统计分析各处理的干物质质量、养分含量、氮累积量和氮吸收效率等。结果表明:在240 mg/L氮处理下，‘东篱秋心’生长最好，花、叶和全株干物质质量最大，且与180 mg/L氮处理差异不显著；根冠比随氮质量浓度提高呈减小趋势；各器官氮含量和累积量均在350 mg/L氮处理下最大；花磷含量在240 mg/L氮处理下最大；花、叶和茎钾含量均在40 mg/L氮处理下最大；氮吸收效率和氮肥偏生产力均随氮质量浓度提高而减小。综合考虑，氮质量浓度为180~240 mg/L，对应的氮施用总量为270~360 mg/株，可作为该品种氮肥施用量参考值。 |
| 关键词: 氮质量浓度 盆栽小菊 干物质 氮磷钾养分 |
| DOI：10.11841/j.issn.1007-4333.2021.09.09 |
| 投稿时间：2020-11-06 |
| 基金项目:中国传统菊花新品种培育与产业化关键技术研究(Z191100008519002) |
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| Effect of nitrogen mass concentration on dry matter and nutrient uptake of potted chrysanthemum ‘Dong Li Qiu Xin' |
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QIU Dandan,YANG Xiuzhen,DONG Nanxi,LI Qingqing,DAI Silan
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| (College of Landscape Architecture/Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding/National Engineering Research Center for Floriculture/Beijing Laboratory of Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China) |
| Abstract: |
| The aim of this study was to explore the effects of nitrogen mass concentration on dry matter and nutrient uptake of potted chrysanthemum, and find a scientific fertilization scheme. Taking ‘Dong Li Qiu Xin' as the test object and perlite as the cultivation medium, an experiment was conducted with different nitrogen mass concentrations(40, 120, 180, 240 and 350 mg/L). Dry matter mass, nutrient content, N accumulation, N uptake efficiency, etc. were analyzed. The results showed that: At 240 mg/L nitrogen mass concentration, ‘Dong Li Qiu Xin' grew better, and the dry matter mass of flower, leaf, and whole plant were the largest, and there were no significantly differences compared with 180 mg/L nitrogen mass concentration. The root-shoot ratio decreased with the increase of nitrogen mass concentration. The N content and accumulation rate of each organ was the largest at 350 mg/L. The P content of flower was the largest at 240 mg/L. The K content of flower, leaf, and stem were the largest at 40 mg/L. N uptake efficiency and partial factor productivity decreased with the increase of nitrogen mass concentration. In summary, 180-240 mg/L nitrogen mass concentration, and the corresponding nitrogen application rate of 270-360 mg/plant can be used as the reference of nitrogen application rate for this variety. |
| Key words: nitrogen mass concentration potted chrysanthemum dry matter N,P and K nutrients |
