Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks
Allometric Equation for Pinang (Areca catechu) Biomass and C Stocks
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DOI：
10.17503/agrivita.v40i3.1124
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发表时间：
2018-10-01
期刊：
影响因子：
0.8
通讯作者：
Hairiah, Kurniatun
中科院分区：
文献类型：
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作者：
Prayogo, Cahyo;Sari, Rika Ratna;Hairiah, Kurniatun
槟榔(槟榔)是巴布亚主要的农林复合作物，具有很高的经济价值。在农林复合系统中，本研究通过破坏性取样，建立了基于树干直径和树高的异速生长方程来估算皮南生物量。地上生物量被测量并与不同高度(离地面0.13和130 cm)的植株茎粗和植株高度相关。将所得到的方程用于不同类型的槟榔树农林复合系统的生物量估算，共18块样地划分在下坡、中坡和上坡位置。对棕榈树而言，株高是生物量的较好预测因子(Y=0.816·05H-1·42；R2=0·89)，对13 cm和130 cm高度的直径预测结果相同(Y=0.0689·D-2·59；R2=0·74)。直径与株高的回归方程为：Y=0.03883*H*D-1.2，R-2=0.96。上坡农林复合系统的碳储量最高(38.8 mg ha-1)，中坡和下坡分别为25.9和22.5 mg ha(-1)。研究区皮南林地上碳储量为0.96~20.9 kg C树(-1)，平均为10.1 kg C树(-1)。
Pinang nut (Areca catechu L.) is a major agroforestry crops in Papua with high economic value. This study developed allometric equations for estimating Pinang biomass on the basis of stem diameter and height by destructive sampling inagroforestry systems. Aboveground biomass was measured and linked to plant stem diameter at various heights (0.13 and 130 cm above the ground) and plant height. The resultant equation was used for biomass estimates in various agroforestry systems with Pinang trees, with total of 18 plots differentiated in bottom, middle and upper slope positions. As expected for palm trees, plant height is a better predictor (Y = 0.816 H-1.42; R-2 = 0.89) of biomass than stem diameter, with equal results for diameter measurements at 13 or 130 cm height (Y = 0.0689 D-2.59; R-2 = 0.74). Best results were for an equation combining diameter and plant height: Y = 0.03883*H*D-1.2; R-2 = 0.96. Agroforestry systems on the upper slopes had the highest carbon stocks (38.8 Mg ha(-1)) than the middle and lower slopes (25.9 and 22.5 Mg ha(-1), respectively). Aboveground carbon stocks of Pinang in study area ranged from 0.96 to 20.9 kg C tree(-1) with an average of 10.1 kg C tree(-1).