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Evaluation of Potential Productivity of Woody energy crops on Marginal Land in China

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Chinese Geographical Science 2017年第6期27卷 963-973页

作者： WANG Jinzhu GAO Ming HE Xinhua ZHANG Qian Natamba LEO XU Chang College of Resources and Environment Southwest University Chongqing 400715 China School of Surveying and Urban Spatial Information Henan University of Urban Construction Pingdingshan 467036 China Chongqing Municipal Tobacco Company Chongqing 400715 China

energy crops are a basic material in the bioenergy industry, and they can also mitigate carbon emissions and have environ- mental 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 104.78 × 106 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 land in the southeast and bare land, bare rock land, and saline alkali land in the northeast. 2） The total area of the marginal land suitable for planting energy crops was determined to be 55.82 × 106 ha, with Xanthoceras sorbifolia and Cerasus humilis mainly grown in the northern China, Jatropha curcas and Comus 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 32.63 × 106 t/yr. Without considering the overlapping areas, the potential productivity was 6.81× 106 t/yr from X. sorbifolia, 8.86× 106t/yr from C. humilis, 7.18 ×106t/yr from J. curcas, 9.55 × 106t/yr from P. chinensis, and 7.78 ×106 t/yr from C. wilsoniana.

关键词： energy crop marginal land potential productivity mechanistic model China

Genetic Variation and Yield Performance of Jerusalem Artichoke Germplasm Collected in China

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Agricultural Sciences in China 2011年第5期10卷 668-678页

作者： LIU Zu-xin BAN Li-pu Yosef Steinberger XIE Guang-hui College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R. China giomass Engineering Center China Agricultural University Beijing 100193 P.R China Mina and Everard Goodman Faculty of Life Sciences Bar-Ilan University 52900 Ramat-Gan Israel

Jerusalem artichoke （Helianthus tuberosus L.） is a perennial tuberous plant rich in inulin and is a potential energy *** study was conducted in a semiarid region of the Loess Plateau to investigate variations in morphological and agronomic characteristics and yield performance of 59 Jerusalem artichoke clones collected from 24 provinces in *** germplasm we collected exhibited variations either in qualitative or in quantitative *** genetic variations （genotype coefficient of variation 〉20%） in the main stem diameter,main stem number per plant,branch number per main stem,tuber number per plant,tuber size,tuber yield,and top yield （i.e.,aboveground biomass） were found as *** clones had a tuber yield ranging between 9.1-10.6 t ha-1,7 clones had a top yield ranging between 18.1-31.3 t ha-1,and 15 clones had a total biomass yield （i.e.,tuber and top weight） between 25.0-35.0 t ha-1 on an oven-dried weight basis under the drought soil and climatic condition in the semiarid *** 59 Jerusalem artichoke clones were clustered into 8 groups based on 17 quantitative traits,and indicated that the most prevalent clones planted by farmers exhibited relatively low *** analysis was conducted on the morphology and agronomy of the *** investigation suggests possible genetic improvement of Jerusalem artichoke for a higher tuber yield or a top biomass yield,and as a promising application for inulin or bioenergy in semiarid regions.

关键词： energy crop biomass semiarid region cluster analysis principal components

The Effect of Mechanical Conditioning on Physical Conditions of Miscanthus Plants

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American Journal of Plant Sciences 2023年第1期14卷 77-88页

作者： Sebastian Redcay Jude Liu Department of Agricultural and Biological Engineering The Pennsylvania State University Pennsylvania United States

Miscanthus is an emerging dedicated energy crop, which can provide excellent yield on marginal lands. However, this crop is more difficult to harvest than many conventional energy crops such as corn stover and switchgrass due to its tall and rigid stalks. crop samples for laboratory studies were collected from the field and the effects of roll spacing, roll speed, and crop input of a mechanical conditioning device on the physical conditions of miscanthus were studied in a lab setting. Test results showed that mechanical conditioning is effective to change the physical conditions of miscanthus to make baling possible or easier. Results also showed that the roll spacing had the most significant impact on the physical conditions of miscanthus, shown by a 115% increase in conditioning over a 0.95 cm (75%) reduction in roll spacing. Increased roll spacing and speed were shown to decrease the amount of torque required to condition the miscanthus.

关键词： energy crop Baling Strength Preprocessing

The Suitability of Maize as a Bio-ethanol crop in South Africa

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Journal of Environmental Science and Engineering 2011年第6期5卷 742-752页

作者： M. Smith N. Kotze Department of Geography Environmental Management and Energy Studies University of Johannesburg Johannesburg 2006 South Africa

Biofuels could contribute, on a worldwide basis, to the attainment of international energy-policy objectives in three ways： by reducing dependence on imported oil; by increasing the availability of renewable energy sources; and by addressing environmental issues. It is an absolute necessity in South Africa to utilise sustainable and renewable energy sources, such as biofuels, but the production of bio-ethanol will ultimately place pressure on the limited and fragile agricultural resources of the country. Because of the proposed bio-ethanol plant at Bothaville this paper will firstly develop a methodology suitable for South African conditions in order to establish whether agricultural crops could be used for the production of biofuels. Secondly, it probes the suitability of maize as a biofuel crop in this country by investigating four possible bio-ethanol potential scenarios which are qualitatively formulated to provide a comprehensive overview of this study. Only in the best-case scenario could maize produce the required volumes as set out by the South African government for 2013.

关键词： Biofuels energy crop maize food security South Africa.

Estimation on the Total Quantity of Biomass energy and Its Environmental Benefit Analysis in Shandong Province

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Meteorological and Environmental Research 2011年第7期2卷 80-82页

作者： ZHENG Yan-lin1,2,LI Fu-li3,LIU Fang4 1.College of Science,Shandong University of Science and Technology,Qingdao 266510,China 2.College of Environmental Science and Engineering,Ocean University of China,Qingdao 266101,China 3.Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China 4.Animal Husbandry and Veterinary Bureau of Wenshang County,Jining 272500,China

[Objective] The aim was to estimate the total quantity of biomass energy and analyze its environmental benefit in Shandong Province.[Method] Based on the data from the statistics yearbook of Shandong Province in 2010,the total quantity of biomass resources and biomass energy in Shandong Province in 2009 was estimated,and its environmental benefit was analyzed.[Result] Biomass resources in Shandong Province mainly refer to crop residues,forest residues,grassland changed from degraded *** degraded land became grassland,the total quantity of biomass resources and biomass energy in Shandong Province in 2009 was 182.808 8 million tons and 2.68×1015 kJ ***,the reduction of total emission of CO2,SO2 and nitrogen oxides was up to 241.265 million tons,and the reduced emission of SO2 accounted for 48.9% of annual SO2 emission in Shandong in *** energy crops plays important roles in the development of new energy sources,reduction of greenhouse gas emission and environmental protection.[Conclusion] The study could provide theoretical foundations for the establishment of energy policy and study on development strategy of biomass energy in Shandong Province.

关键词： Biomass energy energy crop Environmental benefit Shandong Province China