| 5个象草品种的构件生物量特征及分配动态 |
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| 引用本文： | 李有涵,谢昭良,解新明. 5个象草品种的构件生物量特征及分配动态[J]. 草业学报, 2011, 20(5): 11-18. DOI: 10.11686/cyxb20110502 |
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| 作者姓名： | 李有涵 谢昭良 解新明 |
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| 作者单位： | 华南农业大学农学院草业科学系,广东 广州510642 |
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| 基金项目： | 国家自然科学基金(30972138和30671489)资助 |
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| 摘 要： | 象草是华南地区优良牧草,是典型的无性系植物。以MT-1、Mott、Huanan、N51和Guimu No.1象草为试验材料,通过2007-2009年3年的刈割试验,对其构件生物量及分配动态变化进行了研究。结果表明,营养生长期,5个品种(系)茎秆生物量分配比重和叶片生物量分配比重为各构件比重中最高及次高,这与植株扩大叶片面积和增加叶片数量,增加光合产物有关。从营养生长期到生殖生长期,各象草品种(系)叶片生物量降低,枯叶生物量和茎秆生物量增加,呈现彼此消长的动态变化;基部3节生物量及其分配比重降低,茎秆生物量及其分配比重增加,二者亦出现彼此消长的变化。
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| 关 键 词： | 象草 无性系 构件生物量 构件生物量分配 |
Characters and dynamics of modular biomass and its allocation ratio in five cultivars of elephant grass |
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| LI You-han,XIE Zhao-liang,XIE Xin-ming. Characters and dynamics of modular biomass and its allocation ratio in five cultivars of elephant grass[J]. Acta Prataculturae Sinica, 2011, 20(5): 11-18. DOI: 10.11686/cyxb20110502 |
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| Authors: | LI You-han XIE Zhao-liang XIE Xin-ming |
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| Affiliation: | Department of Prataculture Science, College of Agriculture, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Elephant grass(Pennisetum purpureum),a valuable forage in south China,is a typical clonal plant.Modular theory was used to analyze the characteristics and dynamics of modular biomass and its allocation ratio in five elephant grass cultivars(MT-1,Mott,Huanan,N51 and Guimu No.1) from 2007 to 2009,with six harvests.The allocation ratios of culm and leaf blade were the highest and second highest respectively of the modules which contributed to the accumulation of photosynthate in the vegetative growth period.Fr... |
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| Keywords: | elephant grass clone modular biomass allocation ratio of modular biomass |
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