Effects of drip irrigation modes on growth and physiological characteristics of Arabica coffee under different N Levels
郝琨, 刘小刚, 韩志慧, 吴贺林, 余宁, 刘艳伟, 杨启良,
1.Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500,China; 2.College of Hydraulic ＆ Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China)
HAO Kun, LIU Xiao-Gang, HAN Zhi-Hui, WU He-Lin, YU Ning, LIU Yan-Wei, YANG Qi-Liang,
摘要 The objective of this study was to obtain the water-saving and efficient production mode of Arabica coffee. The effects of three drip irrigation modes, conventional drip irrigation (CDI), alternate drip irrigation (ADI) and fixed drip irrigation (FDI) on growth, photosynthetic characteristics, biomass accumulation and irrigation water use efficiency of Arabica coffee were investigated under three nitrogen levels, high nitrogen (NH), middle nitrogen (NM) and low nitrogen (NL).The results showed that there was a significant Logistic curve between the plant height, the stem diameter of Arabica coffee and growth days. Compared with CDI, ADI had no significant effects on leaf net photosynthetic rate, stomatal conductance, instantaneous water use efficiency and biomass accumulation above ground of Arabica coffee, while FDI decreased significantly, ADI and FDI increased irrigation water use efficiency by 5059％ and 3285％, respectively. Compared with NH, with the reduction of N application rate, net photosynthetic rate, stomatal conductance, biomass accumulation above ground and irrigation water use efficiency decreased by 681％-1230％, 1370％-2269％, 961％-1667％ and 978％-1564％. Compared with CDINH, ADINHdecreased net photosynthesis rate and the stomatal conductance out significantly, [JP2]other treatments decreased by 916％-1922％, 1449％-3291％, [JP]and decreased biomass accumulation above ground by 826％-2734％ except ADINH, and increased irrigation water use efficiency by 1646％-6095％ except CDINMand CDINL. Therefore, alternate drip irrigation under high N level (ADINH) is the best water and nitrogen coupling mode of young Arabica coffee tree for water efficiency.
Abstract：The objective of this study was to obtain the water-saving and efficient production mode of Arabica coffee. The effects of three drip irrigation modes, conventional drip irrigation (CDI), alternate drip irrigation (ADI) and fixed drip irrigation (FDI) on growth, photosynthetic characteristics, biomass accumulation and irrigation water use efficiency of Arabica coffee were investigated under three nitrogen levels, high nitrogen (NH), middle nitrogen (NM) and low nitrogen (NL).The results showed that there was a significant Logistic curve between the plant height, the stem diameter of Arabica coffee and growth days. Compared with CDI, ADI had no significant effects on leaf net photosynthetic rate, stomatal conductance, instantaneous water use efficiency and biomass accumulation above ground of Arabica coffee, while FDI decreased significantly, ADI and FDI increased irrigation water use efficiency by 5059％ and 3285％, respectively. Compared with NH, with the reduction of N application rate, net photosynthetic rate, stomatal conductance, biomass accumulation above ground and irrigation water use efficiency decreased by 681％-1230％, 1370％-2269％, 961％-1667％ and 978％-1564％. Compared with CDINH, ADINHdecreased net photosynthesis rate and the stomatal conductance out significantly, [JP2]other treatments decreased by 916％-1922％, 1449％-3291％, [JP]and decreased biomass accumulation above ground by 826％-2734％ except ADINH, and increased irrigation water use efficiency by 1646％-6095％ except CDINMand CDINL. Therefore, alternate drip irrigation under high N level (ADINH) is the best water and nitrogen coupling mode of young Arabica coffee tree for water efficiency.
收稿日期: 2017-03-21
通讯作者:
HAO Kun(1992—), male, M.S. (haokgz@126.com), researching in high efficient utilization of water resources.
作者简介: LIU Xiaogang(1977—), male, Professor (Corresponding author: liuxiaogangjy@126.com), researching in high efficient utilization of water resources.
引用本文:
HAO Kun, LIU Xiao-Gang, HAN Zhi-Hui, WU He-Lin, YU Ning, LIU Yan-Wei, YANG. Effects of drip irrigation modes on growth and physiological characteristics of Arabica coffee under different N Levels[J]. 排灌机械工程学报, 2017, 35(10): 912-920.
HAO Kun, LIU Xiao-Gang, HAN Zhi-Hui, WU He-Lin, YU Ning, LIU Yan-Wei, YANG Qi-Liang, . . Journal of Drainage and Irrigation Machinery Engin, 2017, 35(10): 912-920.
