Energy budgeting and carbon footprint of pearl millet - mustard cropping system under conventional and conservation agriculture in rainfed semi-arid agro-ecosystem
Energy budgeting and carbon footprint of pearl millet - mustard cropping system under conventional and conservation agriculture in rainfed semi-arid agro-ecosystem
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DOI：
10.1016/j.energy.2017.09.136
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发表时间：
2017-12-15
期刊：
影响因子：
9
通讯作者：
Verma, R. K.
中科院分区：
文献类型：
--
作者：
Choudhary, Mukesh;Rana, K. S.;Verma, R. K.
现代农业系统是能源和碳密集型的。减少碳足迹和提高能源利用效率是现代农业可持续发展的两个重要问题。意识到能源和碳使用的影响，本研究对珍珠谷子芥菜生产系统在常规和保护性农业实践中的作用进行了比较。结果表明，免耕秸秆还田4t ha(-1)与常规免耕相比，珍珠谷子和芥菜的产量分别提高22.3%和24.5%，最终保持较高的净收益(1270美元ha-1)。覆盖作物残渣消耗了相当大的能量和碳。占总能耗的72.3-87.1%。厚覆盖(4 t ha(-1))显著提高了常规耕作和免耕的能量输出和能量集约度，而无覆盖的能量利用效率(11.5)、净能量回报(201,977 MJ ha(-1))和能量生产率(0.32 kg MJ ha(-1))最高。碳足迹值随覆盖强度的增加而增加，无覆盖处理下最小。因此，在牲畜饲料需求主要依赖作物秸秆的干旱半干旱地区，应合理利用农作物秸秆。(C)2017爱思唯尔有限公司。保留所有权利。
Modern agricultural systems are energy and carbon intensive. Reducing the carbon footprint and increasing energy use efficiency are two important sustainability issues of the modern agriculture. Realizing the implications of energy and carbon use, the present study was conducted to compare pearl millet mustard production system in conventional and conservation agriculture practices. The results showed that zero tillage with 4 t ha(-1) crop residue increased grain yield of pearl millet and mustard by 22.3 and 24.5% respectively in comparison to conventional tillage without residue which ultimately helped to maintain higher net returns (1270 US$ ha(-1)). Mulching of crop residue consumed considerable energy and carbon. It comprised 72.3-87.1% of the total energy consumption. Thick residue cover (4 t ha(-1)) noticed significantly higher energy output and energy intensiveness in both conventional and zero tillage whereas energy-use efficiency (11.5), net energy return (201,977 MJ ha(-1)) and energy productivity (0.32 kg MJ(-1)) was highest under no-residue cover. Carbon foot print value was increased with intensity of residue cover and found least under no-residue treatment. Therefore, crop residue should be judiciously used in arid and semi-arid region where livestock mainly depends on it for their fodder requirement. (C) 2017 Elsevier Ltd. All rights reserved.