| 光照强度对金钗石斛吸收氮素的影响 |
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| 引用本文： | 张明,陈仕江,万兆良,别之龙,丑明霞,刘大永.光照强度对金钗石斛吸收氮素的影响[J].西南农业大学学报,2000,22(2):108-111. |
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| 作者姓名： | 张明 陈仕江 万兆良 别之龙 丑明霞 刘大永 |
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| 作者单位： | 张明（重庆市 中药研究所，重庆 400065）;陈仕江（重庆市 中药研究所，重庆 400065）;万兆良（西南农业大学，重庆 400716）;别之龙（西南农业大学，重庆 400716）;丑明霞（西南农业大学，重庆 400716）;刘大永（西南农业大学，重庆 400716） |
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| 基金项目： | 国家自然科学基金资助项目(39770903) |
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| 摘 要： | 应用15N 研究光强度对金钗石斛吸收氮素的影响，结果表明光强度为 2×104Lx 处理，在石斛生长的四个阶段吸收营养液中氮量分别比光强度为 5×10Lx 处理高 26．54％，50．07％，31．11％和 22．22％；吸收木屑培养基质中的氮量分别提高 32．84％，43．41％，21．85％和 19．01％；吸收总氮量分别提高 29．19％，46．44％，26．01％和 20．51％。在石斛生长的四个阶段，光照强度为 2×104Lx 处理，植株干物重分别比 5×103Lx 处理提高 12．40％，22．22％，17．08％和 15．00％；但是，光照强度为 5×103Lx 处理根干物重较光强为 2×104Lx 处理高 18．21％，9．63％，10．04％和18．45％。
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| 关 键 词： | 光照强度 氮素 吸收 中药材 金钗石斛 产量 |
| 文章编号： | 1000-2642(2000)02-0108-04 |
| 修稿时间： | 1999-12-06 |
EFFECTS OF LIGHT INTENSITY ON NITROGEN UPTAKE BY DENDROBE (DENDROBIUM NOBILE LINDL) |
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| ZHANG Ming
,CHEN Shi - jiang
WAN Zhao - liang
,BIE Zhi - long
,CHOU Ming - xia
,LIU Da - yong.EFFECTS OF LIGHT INTENSITY ON NITROGEN UPTAKE BY DENDROBE (DENDROBIUM NOBILE LINDL)[J].Journal of Southwest Agricultural University,2000,22(2):108-111. |
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| Authors: | ZHANG Ming CHEN Shi - jiang
WAN Zhao - liang BIE Zhi - long CHOU Ming - xia LIU Da - yong |
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| Institution: | ZHANG Ming
,CHEN Shi - jiang
;(Chongqing China Medicinal Herbs Research Institute, Chongqing 400065, China);WAN Zhao - liang
,BIE Zhi - long
,CHOU Ming - xia
,LIU Da - yong
;(Southwest Agricultural University, Chongqing 400716, China) |
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| Abstract: | In an experiment with dendrobe (Dendrobium nobile Lindl) , the plants were grown on a wood chip medium under 2X10 4 Lx and 5X10 3 Lx and were irrigated with a 15 N-labelled nutrient solution at 8-day intervals from March 2,1998. Samples were taken on May, 19, July 22,September 24 and December 19 to study the effects of light intensity on N uptake by the plants. Analysis of the samples at the four dates showed that as compared with the treatment of low light intensity (5X10 3 Lx),N absorded from the nutrient solution by the plants increased by 26.54%,50.07%,31.11% and 22.22%, N uptake from the wood chip medium by 32.84%,43.41%,21.85% and 19.01%, total N uptake by 29.19%, 46.44%, 26.01% and 20.51%, and dry weight of the plant by 12.40%, 22.22%, 17.08% and 15.00%, respectively in the high light intensity treatment. However, dry weight of the root was greater in the low light intensity treatment, being 18.21%, 9.63%, 10.04% and 18.45% greater than that in the high light intensity treatment as measured at the four dates. |
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| Keywords: | dendrobe light intensity nitrogen |
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