In this paper, based on the data on the poplar model stems at various times from Nangeng Yangtze River marshlands in Haikou Township, Daguan District, Anqing City, Anhui Province, the biomass and growth increments of poplar plantations on the river marshlands were studied systematically, and the volume growth equation and biomass equation were established. The results showed that the poplar forest stands on the Yangtze River marshlands had relatively high growth increments and high forest productivity and could sustain high-speed growth for an extended period, which helped maintain the stability of the river marshland forest ecosystem and had a continuously effective function as the ＂oncomelania-control and schistosomasis-prevention forest＂, while bringing relatively high economic benefits. The quantitative maturity of the Yangtze River marshland poplar plantations was at the age of about 22, later than the common poplar stands. The biomass allocation proportion of the river marshland poplar trunks was more than 60 %, and those of the branches, leaves and roots were about 17%, 3% and 13-19% respectively. The biomass allocation proportion of the trunks increased with age, that of the branches decreased slightly and that of the roots decreased more.%本文利用在安徽省安庆市大观区海口镇南埂长江滩地不同时期所做的杨树解析木资料，较为系统地研究了滩地杨树人工林的生物量及生长量，并建立了其材积生长方程和生物量方程。结果表明：长江滩地杨树林分具有较高的生长量和森林生产力，并且能够维持较长时间的快生长，这有利于长期维持滩地森林生态系统的稳定性，持续有效地发挥“抑螺防病林”的功能，同时也具有较高的经济效益；长江滩地杨树的数量成熟迟于一般杨树林分，约在22年左右；长江滩地杨树树干生物量的分配比例在60％以上，树枝17％左右，树叶3％左右，树根大致在13％-19％之间，树干生物量分配比例随年龄增加而增加，枝叶则略有下降，而树根下降较多。
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