Sinh khối và trữ lượng cacbon trên mặt đất đối với rừng trồng đước (Rhizophora apiculata Blume) tại khu vực ven biển Kiến Vàng, huyện Ngọc Hiển, tỉnh Cà Mau

Abstract

This paper presented the above-ground biomass and carbon stocks of Rhizophora apiculata Blume plantations in the Kien Vang coastal area of Ca Mau province. The traits of R. apiculata plantations aged 5-25 years were collected from 15 temporary standard plots with a size of 200 m². The average tree biomass was determined from 30 sample trees. The research results showed that the total above-ground biomass of R. apiculata plantations at the ages of 10, 20, and 30 years was 201.2 tons/ha, 306.7 tons/ha, and 340.2 tons/ha, respectively. The average stem biomass ratio at classes A = 10, 20, and 30 years was 79.3%, and the remaining 20.7% was branch, leaf, and root biomass. The biomass of R. apiculata plantations changed from the rapid accumulation stage to the slow accumulation stage at age class 5 years. The biomass growth rate of R. apiculata plantations decreased very rapidly from age class 5 years (20%) to age class 20 years (2.7%) and age class 30 years (0.9%). The amount of carbon stored in the above-ground biomass of R. apiculata plantations increased gradually from age class 5 years (50.4 tons/ha) to age class 20 years (144.1 tons/ha) and age class 30 years (164.1 tons/ha).