摘要
通过对毛乌素沙地常见的豆科根茎灌木羊柴的基株和分株种群的调查研究 ,揭示植物的克隆生长的生态适应意义。研究表明 :1)根茎灌木羊柴具有合轴型分枝类型和游击型基株构型。多年生根茎在沙基质中形成多层密集网络结构 ;2 )固定沙丘的羊柴分株种群与半固定沙丘比具有较大的密度和较长的根状茎节间 ,较小的平均株距 ,但两种生境中的分株高度是相似的。固定沙丘的种群生物量和对根茎与花果生物量的投资也都高于半固定沙丘上的种群。本项研究结果为克隆植物觅食行为理论提供了又一例证。
The genet characters and the ramet population characters of the rhizomatous shrub, Hedysarum laeve,in Mu Us Sandland were investigated. The results show that H.laeve exhibited sympodial branching pattern and “guerilla” architecture.The perennial rhizomes formed closely crowed belowground networks.Compared with the ramet population in the semi fixed dunes ,the ramet population in the fixed dunes exhibited higher ramet density and longer rhizome internode, but smaller average ramet spacing.They had similar ramet height.The ramet population in the fixed dunes had greater population biomass,greater biomass allocation to rhizome and greater biomass allocation to sexual reproductive organs(flowers and fruits) than those in the semi fixed dunes.
出处
《植物生态学报》
CAS
CSCD
北大核心
2000年第1期40-45,共6页
Chinese Journal of Plant Ecology
基金
国家杰出青年科学基金(39825106)
国家自然科学基金(39570127,39770132)经费
中国科学院生物科学与技术特支费课题(财政部专项)(STZ-1-101)经费,中国科学院资源与生态环境研究重点项目(KZ952S1-1261)经费的资助
关键词
羊柴
根状茎
克隆生长
沙地
分株种群
Hedysarum laeve
Rhizomes
Clonal growth
Dune
Ramet population
