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马桑是甘肃成县丘陵区的重要薪炭树种,生长在不同立地条件的马桑林生物量差异甚大。在试验区内划分三个不同的立地质量级进行生物量及热能的估算。高、中、低三个立地质量级生物量的最适模型分别为B_(H)=66.8199(D~2H)~(0.9778),B_(M)=65.4861(D~2H)~(0.9531)和B_(L)=108.8330(D~2H)~(0.8375);生物量分别为8581.61公斤/公顷,7119.12公斤/公顷和2062.34公斤/公顷。一个占有2亩马桑林面积的5口之家每年可樵采马桑薪炭林干重789.47公斤,占总需要量的38.45％。
Masson is an important fuelwood species in the hilly region of Chengxian County, Gansu Province. There is great difference in the biomass of Pinus massoniana growing in different site conditions. In the experimental area, three different site quality levels were used to estimate biomass and heat. The optimum models for the biomass of three sites with high, medium and low biomass were B_ (H) = 66.8199 (D ~ 2H) ~ (0.9778) and B_ (M) = 65.4861 ~ B_ (L) = 108.8330 (D ~ 2H) ~ (0.8375). The biomass was 8581.61 kg / ha, 7119.12 kg / ha and 2062.34 kg / ha, respectively. A possession of 2 acres of Ma Sulin area of five families a year can firewood Mussafran dry forest weight 789.47 kilograms, accounting for 38.45% of the total demand.