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Agricultural systems from the Loess Plateau transition to energy , the economy and carbon balance characteristics

Author: GaoXiaoYe
Tutor: HouFuJiang；WangShuMao
School: Lanzhou University
Course: Rural and Regional Development
Keywords: Energy Economy Carbon emissions
CLC: S181
Type: Master's thesis
Year: 2011
Downloads: 55
Quote: 0
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Abstract


Select tongwei - Weiyuan - Xiahe transect as the research object, through the household survey, statistical data collection, field sampling, etc., of the agricultural system from the Loess Plateau transition to crop production systems, livestock production systems, crop - livestock integrated production system architecture, energy balance, economic efficiency and carbon emissions. The main results obtained are as follows: 1. Energy input, from east to west, the average energy input cropping systems gradually reduced livestock systems and integrated into the system energy transition in the middle of Weiyuan most Xiahe least tongwei and Weiyuan crops production inputs to livestock production systems, energy accounted for livestock production systems total input energy rates were 99.3% and 66.2%, livestock production systems, crop production inputs to the energy crop production accounted for the proportion of total input energy were 12.2 percent and 39.7 percent. Energy output, from east to west crop production systems to reduce energy output per household, livestock production systems, household energy output increases, the average energy output of integrated systems were 94923.6MJ/farm, 48635.8 MJ / farm and 86125.0 MJ / farm. Energy efficiency, the average energy efficiency of crop production systems from east to west were 3.1 and 2.4, livestock production systems, increasing energy efficiency, the average energy efficiency of the integrated system were 8.3,1.2 and 10.9 2. Economic inputs, crop production systems in tongwei and Weiyuan household crop production systems to reduce the economic inputs, livestock production systems and integrated system inputs Weiyuan most Xiahe least tongwei and crop production systems Weiyuan Livestock Production Systems economic investment accounted for a total investment of livestock rates were 100% and 33.4% respectively. Economic output, tongwei Weiyuan household crop production systems and economic output were 23012.3 ￥ / farm and 16839.2 (?) / Farm; household livestock production systems in order to increase economic output; integrated production systems in turn outputs per household to 25966.4 Y / farm, 20805.7 Y / farm and 35363.4 (?) / farm. Investment rate of return, tongwei and Weiyuan household investment rate of return for crop production systems were 8.5 and 9.1; livestock systems were 0.9, 1.5 and 33.7; integrated systems were 7.6,3.5 and 33.7 3. Carbon emissions, tongwei Weiyuan crop production systems and household emissions were 559.0 kg / farm and 312 kg / farm, from east to west livestock production systems, carbon emissions per household increased gradually integrated system were 628.9 kg / farm, 397.1 kg / farm and 1638.0 kg / farm, livestock in crop production systems carbon emissions were 2.6 kg / farm and 1.8 kg / farm. Carbon emissions per unit of energy, tongwei higher than the average crop systems Weiyuan, the average livestock production systems and integrated systems units Xiahe highest and lowest Weiyuan. From east to west the average crop production systems and integrated systems carbon emissions per unit of energy output gradually increased livestock production systems Xiahe highest Weiyuan minimum. Carbon emissions per unit of economic, tongwei household crop production systems than carbon emissions per unit of economic investment in Weiyuan, livestock production systems and integrated production systems are carbon emissions per household economic input Xiahe highest Weiyuan minimum; tongwei units per household crop production systems Weiyuan carbon emissions than economic output, livestock production systems and integrated production systems of economic output per household carbon emissions are highest in Xiahe, Weiyuan minimum.

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Agriculture and Biology > Agroecology
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