| 甘蔗/大豆间作减量施氮对甘蔗产量、品质及经济效益的影响 |
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| 作者姓名： | Li ZX Wang JW Yang WT Shu YH Du Q Liu LL Shu L |
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| 作者单位： | 华南农业大学热带亚热带生态研究所,广州,510642;华南农业大学农业部生态农业重点开放实验室,广州,510642;华南农业大学广东省高等学校农业生态与农村环境重点实验室,广州,510642 |
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| 基金项目： | 国家重点基础研究发展计划项目,国家科技支撑计划项目,广东省科技计划项目 |
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| 摘 要： | 在大田栽培条件下,研究了减量施氮对广州地区不同甘蔗/大豆间作模式下甘蔗产量、品质、生物量动态变化及甘蔗群体经济效益的影响.结果表明:氮肥和种植模式对甘蔗产量、品质均无显著影响,各处理甘蔗产量、品质均无显著差异.不同施氮水平的甘蔗/大豆间作系统较单作甘蔗提高了土地利用率,其土地当量比(LER)为1.36～2.12.各处理甘蔗总生物量的动态积累随生育期的推进均符合"S"型生长曲线,低氮水平下问作甘蔗的生物量动态积累特征参数最协调,高氮水平下,甘蔗生长高峰期提前,快速生长最大持续期缩短,甘蔗产量下降,因此,可以通过调整氮素的投入量来改善生物量的增长参数,从而获得高产.低氮处理甘蔗/大豆间作系统经济效益比高氮处理高3.2%～26.3%,说明减量施氮可有效提高群体经济效益.甘蔗/大豆1∶2间作模式的经济效益最好.
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| 关 键 词： | 甘蔗/大豆间作 减量施氮 产量 品质 经济效益 广州 |
Effects of reduced nitrogen application on the yield, quality, and economic benefit of sugarcane intercropped with soybean |
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| Li ZX,Wang JW,Yang WT,Shu YH,Du Q,Liu LL,Shu L.Effects of reduced nitrogen application on the yield, quality, and economic benefit of sugarcane intercropped with soybean[J].Chinese Journal of Applied Ecology,2011,22(3):713-719. |
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| Authors: | Li Zhi-xian Wang Jian-wu Yang Wen-ting Shu Ying-hua Du Qing Liu Li-ling Shu Lei |
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| Institution: | LI Zhi-xian1,2,3,WANG Jian-wu1,YANG Wen-ting1,SHU Ying-hua1,DU Qing1,LIU Li-ling1,SHU Lei1,3(1Institute of Tropical and Subtropical Ecology,South China Agricultural University,Guangzhou 510642,China,2Ministry of Agriculture Key Laboratory of Ecological Agriculture,3Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions,China) |
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| Abstract: | A two-factor field experiment of randomized block design was conducted in Guangzhou to investigate the effects of reduced nitrogen application on the yield,quality,and total biomass dynamic of sugarcane as well as the economic benefit of the sugarcane population under different sugarcane/soybean intercropping patterns.Neither N application nor intercropping pattern had significant effects on the yield and quality of sugarcane,and no significant differences were observed in the yield and quality of sugarcane... |
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| Keywords: | sugarcane/soybean intercropping reduced nitrogen application yield quality economic benefit Guangzhou |
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