文献类型：期刊文献

中文题名：不同养分环境下木荷种源生长和根系发育对邻株竞争响应的差异

英文题名：Different responses of growth and root development of Schima superba provenance to the adjacent plant competition in different nutrient conditions

作者：姚甲宝[1,2] 楚秀丽[1] 周志春[1] 童建设[3] 王晖[3] 余家中[3]

第一作者：姚甲宝

机构：[1]中国林业科学研究院亚热带林业研究所,浙江省林木育种技术研究重点实验室,浙江富阳311400;[2]中国林业科学研究院亚热带林业实验中心,江西分宜336600;[3]浙江省淳安县富溪林场,浙江淳安311701

年份：2017

卷号：28

期号：4

起止页码：1087-1093

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；PubMed;

基金：‘十三五’国家重点研发专项重点课题项目(2016YFD0600606);国家级林业科学技术推广项目([2014]06)资助~~

语种：中文

中文关键词：木荷;种源;邻株竞争;生长;根系可塑性

外文关键词：Schima superba ; provenance ; neighbor competition ; growth ; root plasticity

分类号：S792.11

摘要：研究同质和异质养分环境中邻株竞争对3个木荷种源生长和根系发育的影响,揭示了不同种源木荷生长竞争能力差异原因.结果表明:与同质养分环境相比,3个木荷种源在异质养分环境中具有苗高生长量大、干物质积累量高和根系增生明显等特点.在异质养分环境下,福建建瓯种源木荷苗木生长量显著高于浙江龙泉和江西信丰种源,与杉木混植时尤为突出,这与其根系形态可塑性高和拓殖能力强有关,混植时,福建建瓯种源木荷的根长、根表面积和根体积等根系生长量较单植显著增长20.4%~69.0%,其根系在富养表层大量增生的同时快速向深层贫养层拓殖,占有了更多的空间和资源,提高了觅养能力,使其生长优势更为明显,而浙江龙泉和江西信丰种源根系生长和深层土壤根系分布受邻株竞争影响不同程度的降低.纯植时,可能由于根系自我识别作用,3个木荷种源的根系生长发育均受到抑制,导致福建建瓯种源苗木生长量显著减小,而浙江龙泉种源苗高和干物质积累增长明显,这与其根系生理可塑性有关.建议生产上选用觅养效率高和竞争能力强的福建建瓯种源木荷,采用混交造林的方式提高木荷人工林生产力.
Growth and root development of three Schima superba seedling provenances were influenced by adjacent plant competition in the homogeneous and heterogeneous nutrient environment, which revealed the reasons of S. superba competition differences in the different genotypes. The resuits indicated that, compared with homogeneous nutrient environment, all three S. superba provenances showed higher seedling height, more dry matter accumulation, and significant root proliferation in heterogeneous nutrient environment. Under heterogeneous nutrient environment, the seedlings of S. superba from Jian＇ ou of Fujian exhibited higher competitive advantage in growth than that of S. superba from Longquan of Zhejiang and Xinfeng of Jiangxi, especially standing out under mixed cultivation with seedlings of Cunninghamia lanceolata. Under mixed cultivation, the root growth parameters of S. superba such as root length, root surface area and volume increased by 20.4%-69.0% compared with the single plant, which enhanced the foraging ability and growth ad- vantage. To some extent, however, the root development in Longquan of Zhejiang and Xinfeng of Jiangxi was suppressed when subjected to the pattern of mixed cultivation. Besides, the root growth and development of all three S. superba provenances were suppressed, which might be due to their root self-recognition in the pattern of mono cultivation. Therefore, the seedling growth in Jian＇ ou of Fujian decreased significantly, but seedling growth in Longquan of Zhejiang and Xinfeng of Jiangxi was not suppressed, even increased evidently, as their root physiological plasticity might play the crucial role in seedling growth. Hence the S. superba from Jian＇ ou of Fujian with high foraging efficiency and competition ability was suggested with the method of mixed forestation to improve the S. superba forest plantation productivity.