云南松苗木分化对生物量分配的影响
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摘要
[目的]通过分析比较云南松2年生苗木6个不同生长等级生物量的投资与分配规律,揭示苗木分化对生物量分配的影响。[方法]以云南松2年生苗木为研究对象,采用平均值±0.5倍标准差法将苗木划分为6个不同等级,研究不同等级云南松苗木生物量分配规律。[结果]苗木各组分生物量的投资表现为:叶生物量>茎生物量>根生物量。随着苗木等级的降低,各组分、地上以及单株生物量随之减小;茎生物量分配比例逐渐减小,叶生物量分配比例逐渐增加;叶茎比、光合器官与非光合器官比逐渐增加,根冠比差异不显著;各组分、地上以及单株含水率呈现上升趋势,但大部分等级间差异不显著(P>0.05)。[结论]不同等级苗木具有不同的分配策略,等级较低时优先把生物量分配给叶,随着苗木等级增加,茎生物量分配比例逐步增加。
[Objectives]The aim of present study were to reveal the impacts of seedling differentiation on the biomass allocation by analyzing the investment and allocation strategies of biomass of two-year-old seedlings of Pinusyunnanensis at six different classes.[Methods]P.yunnanensis seedlings were divided into six different classes to reveal the impacts of seedling differentiation on the biomass allocation.[Results]The results showed that the biomass investment of seedling was following the order of leaf>stem>root.With the decrease of seedling class,the biomass of individual plant,aboveground part,and each component of plants was decreased too,while the relative proportions of leaves biomass was increased and stem biomass was decreased gradually,and the ratios of leaf to steam and photosynthetic to non-photosynthetic organs were increased gradually.No significant difference of the root shoot biomass ratio between different seedling classes was detected.Meanwhile,moisture content of individual plant including aboveground and each component were increased weakly when the seedling class level was decreased,but there was no significant difference between the seedling classes.[Conclusion]Seedlings of P.yunnanensis displayed different biomass allocation strategies in different classes.The priority allocation of biomass was made to leaves in lower seedling class and the biomass allocation percentage to stem was increased gradually with the increase of seedling class.
[Objectives]The aim of present study were to reveal the impacts of seedling differentiation on the biomass allocation by analyzing the investment and allocation strategies of biomass of two-year-old seedlings of Pinusyunnanensis at six different classes.[Methods]P.yunnanensis seedlings were divided into six different classes to reveal the impacts of seedling differentiation on the biomass allocation.[Results]The results showed that the biomass investment of seedling was following the order of leaf>stem>root.With the decrease of seedling class,the biomass of individual plant,aboveground part,and each component of plants was decreased too,while the relative proportions of leaves biomass was increased and stem biomass was decreased gradually,and the ratios of leaf to steam and photosynthetic to non-photosynthetic organs were increased gradually.No significant difference of the root shoot biomass ratio between different seedling classes was detected.Meanwhile,moisture content of individual plant including aboveground and each component were increased weakly when the seedling class level was decreased,but there was no significant difference between the seedling classes.[Conclusion]Seedlings of P.yunnanensis displayed different biomass allocation strategies in different classes.The priority allocation of biomass was made to leaves in lower seedling class and the biomass allocation percentage to stem was increased gradually with the increase of seedling class.
引文
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[19]周世勇.无患子苗期生物量积累和分配规律研究[J].西南林业大学学报,2016,36(1):140-143.
[20]王文俊,张薇,李莲芳,等.云南松天然更新幼苗和幼树期的生长动态分析[J].福建林业科技,2017,44(3):75-81.
[21]何怀江,叶尔江·拜克吐尔汉,张春雨,等.吉林蛟河针阔混交林12个树种生物量分配规律[J].北京林业大学学报,2016,38(4):53-62.
[22]王晨,江泽慧,郭起荣,等.毛竹地上器官的生物量分配及其随个体大小变化的规律[J].生态学杂志,2014,33(8):2019-2024.
[23]韩忠明,韩梅,吴劲松,等.不同生境下刺五加种群构件生物量结构与生长规律[J].应用生态学报,2006(7):1164-1168.
[24]韦春义,马英玲,周承鹰.广西巨尾桉2年生人工幼林生物量及生产力研究[J].西部林业科学,2014,43(3):22-26.
[25]汪金松,范秀华,范娟,等.地上竞争对林下红松生物量分配的影响[J].生态学报,2012,32(8):2447-2457.
[26]董点,林天喜,唐景毅,等.紫椴生物量分配格局及异速生长方程[J].北京林业大学学报,2014,36(4):54-63.
[27]李顺秋.绿竹不同器官含水率变化特征探讨[J].安徽农学通报,2013,19(12):21-22.
[28]唐小燕,袁位高,沈爱华,等.闽楠容器苗各器官生物量的分配格局及水分特征研究[J].植物研究,2012,32(1):99-104.
[2]Mokany K,Raison R J,Prokushkin A S,Critical analysis of root:shoot ratios in terrestrial biomes[J].Global Change Biology,2006,12(1):84-96.
[3]Schenk H J.Jackson R B.Rooting depths,lateral root spreads and below-ground/above-ground allometries of plants in water-limited ecosystems[J].Journal of Ecology,2002,90(3):480-494.
[4]李刚,赵祥,张宾宾,等.不同株高的柠条生物量分配格局及其估测模型构建[J].草地学报,2014,22(4):769-775.
[5]Bloom R G,Mallik A U.Indirect effects of black spruce(Pi-cea mariana)cover on community structure and function in sheep laurel(Kalmia angusti folia)dominated heath of eastern Canada[J].Plant and Soil,2004,265(1-2):279-293.
[6]田雪,李海燕,杨允菲.松嫩平原不同生育期虎尾草无性系构件生长与生物量分配[J].应用生态学报,2018,29(3):805-810.
[7]郑元,黄新会,王大玮,等.云南松研究进展及展望[J].现代农业科技,2013(13):169-171.
[8]周丽,徐杨,邓丽丽,等.云南松不同群体苗木生物量与生长分析[J].林业科技开发,2015,29(6):148-153.
[9]陈诗,李根前.一年生云南松不同家系苗生物量研究[J].江苏农业科学,2016,44(6):311-313.
[10]尹艾萍,付玉嫔,祁荣频,等.磷胁迫和不同栽植方式下云南松幼苗生物量及其分配的变化[J].西北林学院学报,2011,26(5):53-58.
[11]蔡年辉,张瑞丽,陈诗,等.云南松幼苗对水分胁迫的生理响应[J].云南农业大学学报(自然科学),2013,28(2):247-250.
[12]杨亚莉,向祖恒,黄正明,等.华榛1年生实生苗质量分级标准的研究[J].园艺与种苗,2018,38(1):34-37.
[13]杨斌,赵文书,姜远标,等.思茅松容器苗苗木分级研究[J].西部林业科学,2004(1):32-37.
[14]江洪,林鸿荣.云南松异速生长现象的初步研究[J].林业科学,1984,20(1):80-83.
[15]LY/T 1950-2011,云南松速生丰产林[S].
[16]林磊,胡庭兴.甘孜州主要造林树种苗木分级标准的研究[J].四川林业科技,2007(5):59-64.
[17]周国模,吴家胜,应叶青,等.喜树种源苗期生物量研究[J].林业科学研究,1999(4):386-391.
[18]杨志玲,杨旭,舒枭,等.厚朴种源间苗期生物量的变异、分配格局及遗传稳定性[J].福建农林大学学报(自然科学版),2011,40(4):351-359.
[19]周世勇.无患子苗期生物量积累和分配规律研究[J].西南林业大学学报,2016,36(1):140-143.
[20]王文俊,张薇,李莲芳,等.云南松天然更新幼苗和幼树期的生长动态分析[J].福建林业科技,2017,44(3):75-81.
[21]何怀江,叶尔江·拜克吐尔汉,张春雨,等.吉林蛟河针阔混交林12个树种生物量分配规律[J].北京林业大学学报,2016,38(4):53-62.
[22]王晨,江泽慧,郭起荣,等.毛竹地上器官的生物量分配及其随个体大小变化的规律[J].生态学杂志,2014,33(8):2019-2024.
[23]韩忠明,韩梅,吴劲松,等.不同生境下刺五加种群构件生物量结构与生长规律[J].应用生态学报,2006(7):1164-1168.
[24]韦春义,马英玲,周承鹰.广西巨尾桉2年生人工幼林生物量及生产力研究[J].西部林业科学,2014,43(3):22-26.
[25]汪金松,范秀华,范娟,等.地上竞争对林下红松生物量分配的影响[J].生态学报,2012,32(8):2447-2457.
[26]董点,林天喜,唐景毅,等.紫椴生物量分配格局及异速生长方程[J].北京林业大学学报,2014,36(4):54-63.
[27]李顺秋.绿竹不同器官含水率变化特征探讨[J].安徽农学通报,2013,19(12):21-22.
[28]唐小燕,袁位高,沈爱华,等.闽楠容器苗各器官生物量的分配格局及水分特征研究[J].植物研究,2012,32(1):99-104.