Effects of spacing pattern and nitrogen levels on photosynthetic characteristics of multiple silage maize under drip irrigation
WANG Zhenhua1,2,3, WANG Jiulong1,2, LI Wenhao1,2, FENG Xiaodong1,2,PEI Lei1,2,BIAN Qingyong1,2, ZHU Yankai1,2
1.College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China; 2.Corps Key Laboratory of Modern Water-saving Irrigation, Shihezi, Xinjiang 832000, China; 3.Dept. of Ecosystem Science and Management, Pennsylvania State University, PA 16802, USA
Abstract:To study the effect of row spacing and nitrogen levels on multiple silage maize photosynthetic characteristics,under the same irrigation quota(288 mm),field experiments were conducted with two spaced modes(KZ,JY)and 5 nitrogen levels(CK:14.04 kg/hm2,F1:97.56 kg/hm2,F2:167.16 kg/hm2, F3:236.76 kg/hm2, F4:306.36 kg/hm2, F5:375.96 kg/hm2).It is shown that silage corn production of KZ at F2-F3levels increased by 5.41%-8.71% compared with that of JY;net photosynthetic rate and transpiration rate of silage maize at photosynthetic active radiation of 1 500-2 000 μmol/(m2·s-1)were higher.Water use efficiency decreased with the increase of photosynthetic active radiation. At the jointing stage KZ at F2-F3levels was higher than JY; at the spinning tasseling stage KZ was lower than JY. Leaf water use efficiency of KZ was higher than that of JY. At the jointing stage and the silking stage, photosynthetic potential of KZ at F2-F3levels was significantly higher than that of JY. For the production of drip irrigation silage maize at photosynthetic active radiation of 1 500-2 000 μmol/(m2·s-1)and F3 levels, the production of KZ was higher than that of JY.
王振华,,, 王久龙,,李文昊,, 冯晓栋,, 裴磊,, 扁青永,, 朱延凯,. 施氮对滴灌复播青贮玉米光合特性的影响[J]. 排灌机械工程学报, 2017, 35(6): 526-534.
WANG Zhenhua,,, WANG Jiulong,, LI Wenhao,, FENG Xiaodong,,PEI Lei,,BIAN Qingyong,, ZHU Yankai,. Effects of spacing pattern and nitrogen levels on photosynthetic characteristics of multiple silage maize under drip irrigation. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(6): 526-534.
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