We have determined the chemical properties of Gmelina arborea and Sarcocephalus latifolius trunk wood (TW) and ramial chipped wood (RCW), in order to examine the applicability of RCWs in soil amendments. The results of the study of S. latifolius represent the first report on this species. Characterizations of TW and RCW samples included determination of extractives, Klason and acid soluble lignin, major monosaccharides, ash, and mineral constituents. Higher contents of total lignins and monosaccharides were found in RCW than in TW for S. latifolius, while opposite results were obtained for G. arborea. The organosolv lignins isolated from the studied samples were analyzed by HPLC, FTIR, GPC, ³¹P NMR and HSQC methods. The studied lignins belong to guaiacyl-syringyl (G–S) type, with a predominance of G units in S. latifolius and S units in G. arborea lignins. Based on obtained results, RCW samples from S. latifolius could be anticipated performing well in soil amendment trials, as indicated by their lower C/N ratios and higher mineral and lignin contents.

为了确定RCW在土壤改良剂中的适用性，我们已经确定了Gmelina arborea和Sarcocephalus latifolius树干木材（TW）和拉米碎木（RCW）的化学性质。S. latifolius的研究结果是该物种的首次报道。TW和RCW样品的表征包括提取物，Klason和酸溶性木质素，主要单糖，灰分和矿物成分的测定。在RCW中发现的总木质素和单糖含量比TW中的S. latifolius高，而G. arborea则得到相反的结果。从所研究样品中分离出的有机溶剂木质素通过HPLC，FTIR，GPC，^31分析P NMR和HSQC方法。所研究的木质素属于愈创木基-丁香基（GS）类型，主要有S. latifolius中的G单位和G. arborea木质素中的S单位。基于获得的结果，从RCW样品S.箬竹可以预期在土壤改良剂试验表现良好，可以通过降低C / N比和较高的矿物和木质素含量所指示的。