CAJ | 학술논문

生物量是植物积累能量的主要体现，其在各器官中的分配是植物对环境适应的结果，反映了植物的生长策略。调查甘肃省景泰县绿洲边缘围封沙质草地常见的27种灌木和草本，采用全挖法研究了各植物盛花期时的个体和根、茎、花、叶等构件的生物量特征以及地下－地上生物量关系（根冠比，R／S）的变化趋势。结果表明：1）27种植物中，花、叶、茎干重小于1．0 g 的分别占到89％，70％，56％，27种植物的根冠比均小于1；2）随着封育措施和人工抚育措施的实施，4种灌木的根冠比（R／S）：沙蒿（均值为0．32）、猫头刺（均值为0．78）、荒漠锦鸡儿（均值为0．24）和白刺（均值为0．10）在各样地中表现出显著差异性；3）大部分植物构件对地上生物量的贡献率为：茎＞叶＞花＞根，植物构件对个体生物量的贡献率为：叶＞茎＞花＞根；一年生草本地上（花、叶、茎）生物量与个体生物量的比率显著高于多年生草本和灌木（P ＜0．05），不同构件对生物量贡献率的差异有利于不同生活型植物的种群扩散和繁衍。
생물량시식물적루능량적주요체현，기재각기관중적분배시식물대배경괄응적결과，반영료식물적생장책략。조사감숙성경태현록주변연위봉사질초지상견적27충관목화초본，채용전알법연구료각식물성화기시적개체화근、경、화、협등구건적생물량특정이급지하－지상생물량관계（근관비，R／S）적변화추세。결과표명：1）27충식물중，화、협、경간중소우1．0 g 적분별점도89％，70％，56％，27충식물적근관비균소우1；2）수착봉육조시화인공무육조시적실시，4충관목적근관비（R／S）：사호（균치위0．32）、묘두자（균치위0．78）、황막금계인（균치위0．24）화백자（균치위0．10）재각양지중표현출현저차이성；3）대부분식물구건대지상생물량적공헌솔위：경＞협＞화＞근，식물구건대개체생물량적공헌솔위：협＞경＞화＞근；일년생초본지상（화、협、경）생물량여개체생물량적비솔현저고우다년생초본화관목（P ＜0．05），불동구건대생물량공헌솔적차이유리우불동생활형식물적충군확산화번연。
Plant biomass mainly reflects the energy accumulated by plants.Plant species have evolved special-ized strategies to regulate biomass allocation among various organs or between above and below ground bio-mass.We investigated total biomass and biomass allocation characteristics of 27 shrub and herbaceous species in an exclosure on grassland in a marginal oasis area on sandy soil at Jingtai,Gansu Province.The flower,leaf and stem biomass comprised less than 1.0 g in 89%,70% and 56% of the 27 species respectively and the root∶shoot ratio (R∶S)of all species was less than 1.The R∶S of Artemisia desertorum ,Oxytropis aci-phylla ,Caragana roborovskyi and Nitraria sibirica differed significantly between natural exclosure and artifi-cially restored sites.The ratio of aboveground biomass∶total biomass of annual herbaceous species was signifi-cantly higher than those of perennial herbaceous and shrub species.These characteristics are deemed advanta-geous for biodiversity in this environment.