氮素对喜树光合作用、营养元素和
喜树碱含量的影响

匡鹤凌; 汪贵斌; 曹福亮

doi:10.3969/j.issn.1000-2006.2016.03.003

氮素对喜树光合作用、营养元素和喜树碱含量的影响

匡鹤凌,汪贵斌,曹福亮

南京林业大学学报（自然科学版） ›› 2016, Vol. 40 ›› Issue (03) : 15-20.

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南京林业大学学报（自然科学版） ›› 2016, Vol. 40 ›› Issue (03) : 15-20. DOI: 10.3969/j.issn.1000-2006.2016.03.003

专题报道

氮素对喜树光合作用、营养元素和喜树碱含量的影响

匡鹤凌,汪贵斌^*,曹福亮

作者信息 +

Influence of nitrogen levels on photosynthesis,nutrient elements and camptothecin content of Camptotheca acuminata

KUANG Heling, WANG Guibin^*,CAO Fuliang

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文章历史 +

摘要

以喜树(Camptotheca acuminata)幼林为试验材料,在田间条件下施以不同剂量的氮素,测定了光合速率、叶绿素含量、喜树碱含量等的变化情况,探讨了不同氮素施用量对喜树光合作用、叶片营养元素和喜树碱含量的影响。结果表明:随着氮素施用量的提高,喜树叶片的光合作用、磷元素和喜树碱含量都呈先升高后下降的变化趋势,光合速率和磷元素含量以施用氮素30 g/株处理最高,而喜树碱含量以20 g/株处理最高; 叶绿素及氮元素含量则随着氮素施用量的升高呈逐渐上升的趋势,均在50 g/株处理下最高。钾元素含量则随氮素施用量的提高呈逐渐降低的趋势,且以50 g/株处理最低; 喜树碱单株产量以施用氮素30 g/株处理最高,以对照(N0)处理最低。综合各项指标,认为氮素施用量30 g/株最有利于提高喜树的光合速率,促进叶片对营养元素的积累,进而促进喜树碱的生物合成。

Abstract

A field experiment was carried out to investigate the effect of different nitrogen on growth of Camptotheca acuminata seedlings, photosynthesis, leaf nutrient elements and camptothecin content by determine the variation of photosynthetic rate, chlorophyll content, camptothecin content and so on. The results indicated that with the increase of nitrogen level, the photosynthesis, phosphorus and camptothecin content in C. acuminata leaves initially increased then decreased. Photosynthetic rate and phosphorus element content were the highest in the fertilizering amount of 30 g per plant, and camptothecin content was the highest in the fertilizering amount of 20 g per plant. Chlorophyll and nitrogen content, along with the increased nitrogen levels showed a gradual upward trend, and they were the highest in the fertilizering amount of 50 g per plant. Potassium content with the increasing nitrogen level gradually decreased, it was the lowest in the fertilizering amount of 50 g per plant. Camptothecin yield per plant in the fertilizering amount of 30 g treatment was the highest, the control(N0)was the lowest. Based on a comprehensive analysis of all indicators, we suggested that the right amount of nitrogen levels(30 g per plant)would improve the C. acuminata photosynthetic rate and promote the accumulation of nutrient elements in the leaf, thus contributing to the biosynthesis of camptothecin.

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匡鹤凌,汪贵斌,曹福亮. 氮素对喜树光合作用、营养元素和喜树碱含量的影响[J]. 南京林业大学学报（自然科学版）. 2016, 40(03): 15-20 https://doi.org/10.3969/j.issn.1000-2006.2016.03.003

KUANG Heling, WANG Guibin,CAO Fuliang. Influence of nitrogen levels on photosynthesis,nutrient elements and camptothecin content of Camptotheca acuminata[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2016, 40(03): 15-20 https://doi.org/10.3969/j.issn.1000-2006.2016.03.003

中图分类号： S725.5 S792.99

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基金

收稿日期:2015-11-18 修回日期:2016-01-21
基金项目:“十二五”国家科技支撑计划(2012BAD21B05)
第一作者:匡鹤凌(865412162@qq.com)。*通信作者:汪贵斌(guibinwang99@163.com),教授,博士。
引文格式:匡鹤凌,汪贵斌,曹福亮. 氮素对喜树光合作用、营养元素和喜树碱含量的影响[J]. 南京林业大学学报(自然科学版),2016,40(3):15-20.