干旱荒漠区荒漠锦鸡儿种群繁殖对策研究

通过调查荒漠锦鸡儿(Caragana roborovskyi)灌丛的繁殖倾向、克隆生长特性及分株特征,研究荒漠锦鸡儿的繁殖特点并探讨其适应干旱荒漠环境的机制。结果表明:荒漠区荒漠锦鸡儿既可以进行无性繁殖,又可以进行有性繁殖,且无性繁殖所占的比例(95.8%)明显高于有性繁殖(4.2%)。荒漠锦鸡儿由根萌蘖产生无性系分株,其克隆生长构型为游击型。综合分析认为,荒漠锦鸡儿通过游击型克隆繁殖和发达的根系适应荒漠区的干旱贫瘠环境,使其成为荒漠区的优势种。

Primary Study on Reproduction Strategies of Caragana roborovskyi in the Arid Desert Region

To understand the reproductive characteristics and adaptation strategies of Caragana roborovskyi in the arid desert.The breeding tendency,clonal growth and ramets characteristics of C.roborovskyi in the Alshan desert region of the Inner Mongolia Plateau were studied.Results showed that C.roborovskyi propagated not only by asexual reproduction but also by sexual reproduction.The proportion of asexual reproduction(95.8%) was significantly higher than that of sexual reproduction(4.2%).C.roborovskyi produced ramets mainly by sprouted root and established clonal architecture known as "Guerilla".Overall,C.roborovskyi adapted to both arid and barren environment of Alshan desert region by "Guerilla" clonal propagation and well-developed root system which determined it as the dominant species in the desert.