芦苇种群的繁殖方式对湿地生态环境的适应机制

通过对芦苇不同构件生物量、热值和营养元素的生殖配置的测定和分析,研究了其种群对湿地生态环境的适应对策。结果表明:地上部各构件生物量7、8月份达到最大值,花序生物量很小,而地下部根状茎生物量9月份达到最大值;热值以花序最大,不定根最小;繁殖构件各营养元素的生殖配置以根茎为最高,繁殖构件之间营养元素比例的变化从N元素的6.1∶1到Ca元素的120∶1。

Study on the Adaptive Mechanism of Reproduction Way of Phragmites australis Population to the Wetland Ecological Environment

Phragmites australis(Clav.) Trin is a widespread species in the world and it has a strong adaptability.Its reproductive way is clonal and sexual.Measuring and analyzing the reproductive allocation of biomass,caloric value and nutrient elements of different components Phragmites australis(Clav.) Trin,its adaptive mechanism of population to the wetland habitat was studied.The results showed that the biomass maximum of components aboveground appeared in July and August.The biomass of inflorescence was the least among these components. But the biomass maximum of rhizome underground appeared in September.The caloric value content of the inflorescence has a maximum and that of the adventitious root has a minimum.The reproductive allocation maximum of the nutrient elements of these reproductive components is of rhizome and the ratio range of nutrient elements of these reproductive components is from 6.1:1 of the element N and 120:1 of the Ca.