| 林窗大小对白背三七生长及营养成分的影响 |
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| 引用本文： | 毛玉明,乔卫阳,武克壮,虞木奎,成向荣.林窗大小对白背三七生长及营养成分的影响[J].浙江农林大学学报,2016,33(1):88-93. |
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| 作者姓名： | 毛玉明 乔卫阳 武克壮 虞木奎 成向荣 |
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| 作者单位： | 1.浙江省开化县林场, 浙江 开化 324300;2.中国林业科学研究院 亚热带林业研究所, 浙江 杭州 311400 |
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| 基金项目： | 国家自然科学基金资助项目（31300519） |
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| 摘 要： | 林菜复合经营模式构建对促进山区林下经济发展具有重要意义。为探明林窗大小对白背三七Gynura divaricata生长及品质变化的影响，在浙江开化开展了杉木Cunninghamia lanceolata大林窗（平均光照强度763 molm－2s－1），小林窗（平均光照强度245 molm－2s－1）和林下（平均光照强度89 molm－2s－1）3种生境对白背三七生长、光合及营养成分影响的研究。结果表明:相对于无林窗的杉木林下，生长在较大林窗内（面积12~16 m2）的白背三七叶片光合速率、株高、地径、分枝数，叶片钾、磷、维生素C以及缬氨酸、蛋氨酸和赖氨酸等水溶性氨基酸质量分数显著增加（P＜0.05），而较小的林窗（面积小于9 m2）对白背三七生长及品质没有显著影响（P＞0.05）。由此可见，林窗大小对白背三七生长和营养品质有重要影响。但在郁闭度大于0.8的杉木林下并不适宜直接套种白背三七，对现有杉木人工林进行适度间伐，提高林下光照条件，将有利于林菜复合经营系统发展。图2表3参23
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| 关 键 词： | 植物学 白背三七 林窗 光合作用 生长 营养成分 |
| 收稿时间： | 2015-03-04 |
Growth,photosynthesis, and nutrition of Gynura divaricata with forest gap treatments |
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| MAO Yuming,QIAO Weiyang,WU Kezhuang,YU Mukui,CHENG Xiangrong.Growth,photosynthesis, and nutrition of Gynura divaricata with forest gap treatments[J].Journal of Zhejiang A&F University,2016,33(1):88-93. |
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| Authors: | MAO Yuming QIAO Weiyang WU Kezhuang YU Mukui CHENG Xiangrong |
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| Institution: | 1.Kaihua Forest Farm, Kaihua 324300, Zhejiang, China;2.Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang,China |
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| Abstract: | It is important to construct a mixed forest-vegetable system to promote economic development in mountainous areas. To determine the size of forest gap impact on growth, nutrition characteristics of Gynura divaricate in a Chinese fir plantation of Kaihua, Zhejiang Province. Growth, photosynthesis, and nutrition of G. divaricata were studied in three habitats types having: a large gap （area from 12 m2 to 16 m2, average light intensity of 763 molm－2s－1）, a small gap （area ＜ 9 m2, average light intensity of 245 molm－2s－1）, and no gap （average light intensity of 89 molm－2s－1）; three or four gaps or no gap site for each treatment were randomly selected in this study. Results showed that the photosynthetic rate, plant height, ground diameter, number of branches, potassium （K）, phosphorus （P）, Vitamin C （Vc）, and content of some water-soluble amino acids （e.g. valine, methionine, and lysine） for the large gap treatment were significantly greater than no gaps （P ＜ 0.05）. However, growth, photosynthesis, and nutrition with small gap treatments were not significantly different than those with no gap treatments （P ＞ 0.05）. Therefore, due to the forest gap influence on growth and nutrition of G. divaricata, it was not suitable to plant under Chinese fir plantations with a high canopy coverage （＞ 0.8） unless thinning was conducted to improve understory light conditions thereby allowing development of the mixed forest-vegetable system.［Ch, 2 fig. 3 tab. 23 ref.］ |
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