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作 者:何晓[1,2] 包维楷[3] 辜彬[1] 郑帷婕[1] 冷俐[3]
机构地区:[1]四川大学生命科学学院 [2]中国科学院成都生物研究所四川成都610041 [3]中国科学院成都生物研究所
出 处:《生态环境》2007年第3期973-981,共9页Ecology and Environmnet
基 金:中国科学院知识创新工程项目(KZCX3-SW-339;KSCX1-07-01);"西部之光"项目共同资助
摘 要:植物干质量热值是植物干物质完全燃烧所释放的能量值,反映了植物光合作用中固定太阳辐射能的能力。文章收集国内已有的129科、460属、1110种维管植物的干质量热值数据,并加上作者自测的8种苔藓植物干质量热值进行统计分析和差异性检验,分析国内高等植物干质量热值特点。结果显示,植物不同器官的平均GCV为繁殖体(19677.23J·g-1)>叶(19518.22J·g-1)>枝(19455.91J·g-1)>皮(19183.12J·g-1)>干(19122.49J·g-1)>根(18701.44J·g-1);群落中不同组分平均GCV的排序是乔木层(19672.48J·g-1)>灌木层(19218.62J·g-1)>凋落物层(18689.86J·g-1)>草本层(17682.47J·g-1)>苔藓层(15645.44J·g-1);在不同生活型的植物中,挺水植物(18492.67J·g-1)>浮水植物(16381.25J·g-1)>沉水植物(14589.09J·g-1);平均GCV多年生草本GCV(17903.28J·g-1)>一年生草本(17652.74J·g-1);常绿型木本植物各器官均大于落叶型木本植物,针叶树种各器官均大于阔叶树种;从不同气候型来看,高纬度地区的温带大陆性季风气候以及高寒大陆性气候的植物平均GCV较高,低纬度的热带季风气候区的植物比亚热带季风气候区的高,温带大陆性半干旱气候区内最低。Plant caloric value is termed heat emitted by plant materials after complete combustion of dry matter. It indicates capability of plants to fix solar radiation and therefore. This thesis collects, analyzes and tests the available gross caloric values of plants in China, including 129 families, 460 genus and 1 110 species vascular plants and 8 bryophytes tested by the author of this paper. The results show that the rankings of average GCV are 1) propagule (19 677.23 J·g^-1) 〉 leaf (19 518.22 J·g^-1) 〉 branch (19 455.91 J·g^-1) 〉 bark (19 183.12 J·g^-1) 〉 stem (19 122.49 J·g^-1) 〉 root (18 701.44 J·g^-1) from the angle of organs; 2)arbor (19672.48 J·g^-1) 〉 shrub (19 218.62J·g^-1) 〉 litter (18 689.86 J·g^-1) 〉 herbage (17 682.47 J·g^-1) 〉 bryophyte (15 645.44 J·g^-1) from the angle of different levels of the community. If seeing from the angle of different forms of species, we will find that I) Emergent plants(18492.67 J·g^-1) 〉Floating plants(16381.25 J·g^-1) 〉Submerged plants(14589.09 J·g^-1), 2) perennial herbage (17903.28 J·g^-1) 〉 annual herbage (17 652.74 J·g^-1), 3) the average GCV of organs of evergreen tree plants is higher than that of deciduous tree plants, and 4) coniferous species is higher than broad-leaved trees. If seeing from the angle of climate, we will find that 1) the average GCV of plants in temperate continental monsoon climate and highland continental climate of high latitudes is relatively high, 2)that in tropical monsoon climate higher than in subtropical monsoon climate and 3) that in temperate continental semi-arid climate the lowest.
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