| The Quantitative Evaluation of Output Efficiency in Different Cropping Pattems |
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| 作者姓名： | LIU Yu-hua ZHANG Li-feng |
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| 作者单位： | College of Agronomy, Agricultural University of Hebei, Baoding 071001, P.R.China |
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| 基金项目： | This work was supported by the programs of Coupling Mechanism of Productivity and Composites of the Agri- Pasture and Forest System （G2000018606） and A Model for Preventing Desertification in the Transitional Zone Between Farm and Pasture （FS2000-003）. |
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| 摘 要： |
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| 关 键 词： | 定量评价 间作 农作物 土壤 营养物质 |
The Quantitative Evaluation of Output Efficiency in Different Cropping Patterns |
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| LIU Yu-hua ZHANG Li-feng.The Quantitative Evaluation of Output Efficiency in Different Cropping Pattems[J].Agricultural Sciences in China,2006,5(2):98-102. |
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| Authors: | Yu-hua LIU Ph D Professor Li-feng ZHANG |
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| Institution: | College of Agronomy, Agricultural University of Hebei, Baoding 071001, P.R. China |
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| Abstract: | Quantitative indexes such as land equivalent ratio, yield equivalent and value of output equivalent were used to evaluate output efficiencies of different cropping patterns, i.e., sequential cropping, intercrops and crop rotation. Compared to single cropping, land use efficiencies under sequential cropping, intercrops and crop rotation were raised by 62, 38 and 21%, respectively. The unit area yield under sequential cropping, intercrops and crop rotation were raised by 63, 29 and 16%, respectively. The unit area value was also enhanced under sequential cropping and intercrops, 76 and 35% higher than that under single cropping. The paper provides a useful tool for comparing farm output efficiency and build up a theoretical basis for further research on output efficiency of various cropping patterns in the future. |
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| Keywords: | sequential cropping intercrops rotation cropping patterns quantitative evaluation |
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