假苇拂子茅群落生物量初步研究

A PRELIMINARY STUDYS ON THE BIOMASS OF CALAMAGROSTIS PSEUDOPHRAGMITES COMMUNITY

本文研究了假苇子拂子茅群落的生物量，测定了地上和地下生物量及其季节和空间变化。研究结果表明，假苇拂子茅群落生物量季节动态较为明显，９月中旬地上生物量达峰值（１４２．５４ｇ／ｍ２）；地下生物量主要集中在０—１０ｃｍ，季节变化亦很明显，５月最低（１７０．３２ｇ／ｍ２），９月达峰值（４１０．２６ｇ／ｍ２），最低值和最高值出现都与春季营养体萌发有关。假苇拂子茅群落Ｆ／Ｃ值偏低，峰值期仅为０．３８８。

This paper studied seasonal and spatial changes of biomass above-ground and under parts in the Calamagrostis pseudophragmites community. The results showed obviously season al dynamics in biomass at the Caldmagrostis pseudophragmites community. Aboveground biomass achieved maximum value (142. 54 g/m2 ) in mid-September. Underground biomass was mainly concentrated on 0-10 cm of the soil layer, seasonal changes was significant too,and lowest value (170. 32 g/m2) appeared in May, the maximum appeared in September.There existed a close correlation between the maximum-minimum value and the vegetative ger mination of spring. The F/C ratio of Calamagrostis pseudophragmites community was as low as 0. 388 in the period of high peak.