科研成果详情

Evaluation of Potential Productivity of Woody Energy Crops on Marginal Land in China

作者:王金柱

Abstract: Energy crops are a basic material in the bioenergy industry, and they can also mitigate carbon emissions and have environmental benefits when planted on marginal lands. The aim of this study was to evaluate the potential productivity of energy crops on marginal lands in China. A mechanistic model, combined with energy crop and land use characteristics, and meteorological and soil parameters, was used to simulate the potential productivity of energy crops. There were three main results. 1) The total marginal land in China was determined to be 1.0478 × 108 ha. The 400-mm precipitation boundary line, which is the dividing line between the semi-humid and semi-arid zones in China, also divided the marginal land into shrub land and sparse forest landin the southeast andbare land, bare rock land, and saline alkali landin the northeast. 2) The total areaof the marginal landsuitable for planting energy crops was determined to be 5.582 × 107 ha, with Xanthoceras sorbifolia and Cerasus humilis mainly grown in the northern China, Jatropha curcas and Cornus wilsoniana mainly grown in the southwest and southeast, and Pistacia chinensis mainly grown in the central area, while also having a northeast-southwest zonal distribution. 3) Taking the highest yield in overlapping areas, the potential productivity of target energy crops was determined to be 3.263 × 107 t/yr. Without considering the overlapping areas, the potential productivity was 6.81 × 106 t/yr from X. sorbifolia, 8.86 × 106 t/yr from C. humilis, 7.18 × 106 t/yr from J. curcas, 9.55 × 106 t/yr from P. chinensis, and 7.78 × 106 t/yr from C. wilsoniana. 

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