干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2014年
6期
215-220
,共6页
棒果芥%福海棒果芥%黄花棒果芥%生物量分配%异速生长指数%类短命植物
棒果芥%福海棒果芥%黃花棒果芥%生物量分配%異速生長指數%類短命植物
봉과개%복해봉과개%황화봉과개%생물량분배%이속생장지수%류단명식물
Sterigmostemum tomentosum%Sterigmostmum fuhaiense%Sterigmostemum sulfureum%biomass alloca-tion%allometric scaling exponent%ephemeroid plants
类短命植物是准噶尔荒漠早春草本植物类群的重要而独特的组成部分，研究其生物量分配和异速生长关系，有助于深入了解类短命植物的生存策略与生态功能。以棒果芥（ Sterigmostemum tomentosum ）、福海棒果芥（ S ． fuhaiense ）和黄花棒果芥（ S ． sulfureum ）为研究对象，采用挖掘法获取野外成株全株生物量，对三者的器官生物量、分配比例及异速生长关系进行了对比分析。结果表明，3种植物器官生物量及其分配比例均差异明显。福海棒果芥生物量最大，但根冠比（R／S）和叶冠比（L／S）最小；棒果芥生物量最小，但L／S最大；黄花棒果芥则具有最大的R／S。棒果芥和黄花棒果芥的根冠比（R／S）均随个体的增大而显著下降，表明二者地上（AGB）与地下生物量（BGB）分配受到个体大小的强烈影响。福海棒果芥AGB－BGB间为等速生长关系（幂指数α＝1），而另外2种均为异速生长关系；棒果芥、福海棒果芥的叶生物量（LB）与AGB间为等速生长关系，而黄花棒果芥符合异速生长关系（α＜1）；3个物种的LB－BGB间具有共同的异速生长指数（0．816），表现出强烈的功能趋同性。总之，3个物种间的生物量分配及异速生长关系没有一致规律，但体现了类短命植物生物量分配的特点。
類短命植物是準噶爾荒漠早春草本植物類群的重要而獨特的組成部分，研究其生物量分配和異速生長關繫，有助于深入瞭解類短命植物的生存策略與生態功能。以棒果芥（ Sterigmostemum tomentosum ）、福海棒果芥（ S ． fuhaiense ）和黃花棒果芥（ S ． sulfureum ）為研究對象，採用挖掘法穫取野外成株全株生物量，對三者的器官生物量、分配比例及異速生長關繫進行瞭對比分析。結果錶明，3種植物器官生物量及其分配比例均差異明顯。福海棒果芥生物量最大，但根冠比（R／S）和葉冠比（L／S）最小；棒果芥生物量最小，但L／S最大；黃花棒果芥則具有最大的R／S。棒果芥和黃花棒果芥的根冠比（R／S）均隨箇體的增大而顯著下降，錶明二者地上（AGB）與地下生物量（BGB）分配受到箇體大小的彊烈影響。福海棒果芥AGB－BGB間為等速生長關繫（冪指數α＝1），而另外2種均為異速生長關繫；棒果芥、福海棒果芥的葉生物量（LB）與AGB間為等速生長關繫，而黃花棒果芥符閤異速生長關繫（α＜1）；3箇物種的LB－BGB間具有共同的異速生長指數（0．816），錶現齣彊烈的功能趨同性。總之，3箇物種間的生物量分配及異速生長關繫沒有一緻規律，但體現瞭類短命植物生物量分配的特點。
류단명식물시준갈이황막조춘초본식물류군적중요이독특적조성부분，연구기생물량분배화이속생장관계，유조우심입료해류단명식물적생존책략여생태공능。이봉과개（ Sterigmostemum tomentosum ）、복해봉과개（ S ． fuhaiense ）화황화봉과개（ S ． sulfureum ）위연구대상，채용알굴법획취야외성주전주생물량，대삼자적기관생물량、분배비례급이속생장관계진행료대비분석。결과표명，3충식물기관생물량급기분배비례균차이명현。복해봉과개생물량최대，단근관비（R／S）화협관비（L／S）최소；봉과개생물량최소，단L／S최대；황화봉과개칙구유최대적R／S。봉과개화황화봉과개적근관비（R／S）균수개체적증대이현저하강，표명이자지상（AGB）여지하생물량（BGB）분배수도개체대소적강렬영향。복해봉과개AGB－BGB간위등속생장관계（멱지수α＝1），이령외2충균위이속생장관계；봉과개、복해봉과개적협생물량（LB）여AGB간위등속생장관계，이황화봉과개부합이속생장관계（α＜1）；3개물충적LB－BGB간구유공동적이속생장지수（0．816），표현출강렬적공능추동성。총지，3개물충간적생물량분배급이속생장관계몰유일치규률，단체현료류단명식물생물량분배적특점。
The ephemeroid plants are an important and unique component of the early spring herbaceous plants com-munity in Junggar Basin of China . The study on relationship between biomass allocation and allometric growth in ephemeroid plants will contribute to deepen understanding about their survival strategy and ecological function . Sterig-mostemum tomentosum , S . fuhaiense ,and S . sulfureum were used ,the total plant biomass of mature individuals were obtained by using excavation in the field ,and organ biomass ,allocation ratios and the allometric relationships among the three species were compared .The results showed significant difference in organ biomass and biomass allocation ratios a-mong the three species . S . fuhaiense had the largest biomass ,but its ratio of root to shoot (R/S ) and the ratio of leaf to shoot (L/S ) were the lowest . S . tomentosum had the smallest biomass ,but L/S was the largest . S . sulfureum showed the largest R/S .The R/S of S . tomentosum and S . sulfureum declined noticeably with increasing of plant biomass ,in-dicating that allocation of aboveground biomass (AGB ) and belowground biomass (BGB ) were strongly influenced by plant size (biomass) .The biomass pair AGB-BGB of S . fuhaiense showed an isometric effect (i .e .their allometric scaling exponents were 1 .0 ) ,while the other two species showed allometric effect (the exponent< 1 .0 ) .The biomass pair AGB-LB of S . tomentosum and S . fuhaiense showed an isometric effect;whereas S . sulfureum fited the allomet-ric relationship .The biomass pair LB -BGB of all the three species exhibited a common allometric scaling exponent (0 .816) ,showing a strong functional convergence .In conclusion ,there was no consistency between allocation pattern and allometric relationship in three Sterigmostemum species ,but it represented the biomass allocation characteristics of ephemeroid plants .
