施氮对滴灌复播青贮玉米光合特性的影响  

Effects of spacing pattern and nitrogen levels on photosynthetic characteristics of multiple silage maize under drip irrigation

作　　者：王振华[1,2,3] 王久龙[1,2] 李文昊[1,2] 冯晓栋 裴磊[1,2] 扁青永 朱延凯 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]石河子大学现代节水灌溉兵团重点实验室,新疆石河子832000 [3]宾夕法尼亚州立大学生态系统科学与管理系,美国宾夕法尼亚16802

出　　处：《排灌机械工程学报》2017年第6期526-534,共9页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家科技支撑计划项目(2015BAD20B03)

摘　　要：通过田间试验研究了相同灌溉定额(288 mm)条件下,行距(KZ,JY)和施氮水平(CK:14.04 kg/hm^2,F_1:97.56 kg/hm^2,F_2:167.16 kg/hm^2,F_3:236.76 kg/hm^2,F_4:306.36 kg/hm^2,F_5:375.96 kg/hm^2)对复播青贮玉米光合特性的影响.结果表明:施氮量为167.16~236.76 kg/hm^2,KZ的产量比JY增加5.41%~8.71%;光合有效辐射为1 500~2 000μmol/(m^2·s^(-1))时,青贮玉米净光合速率和蒸腾速率较大,水分利用效率随光合有效辐射增加呈递减趋势;施氮量为167.16~236.76 kg/hm^2时,拔节期KZ高于JY;抽雄吐丝期KZ低于JY,KZ叶片水平水分利用效率显著高于JY;施氮量为167.16~236.36 kg/hm^2时,拔节期和抽雄吐丝期KZ光合势显著高于JY.就作物高产、高效而言,滴灌复播青贮玉米适宜的光合有效辐射为1 500~2 000μmol/(m^2·s^(-1)),施氮量为236.76 kg/hm^2时,行距为KZ.To characteristics spaced modes hm^2, F3：236. study the effect of row spacing and nitrogen levels on multiple silage maize photosynthetic , under the same irrigation quota （288 mm）, field experiments were conducted with two （ KZ ,JY） and 5 nitrogen levels （ CK ： 14. 04 kg/hm^2, F1：97.56 kg/hm^2, F2 ： 167. 16 kg/ 76 kg/hm^2, F4：306. 36 kg/hm^2, F5：375.96 kg/hm^2）. It is shown that silage corn production of KZ at F2 - F3 levels 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/（m^2·s^-1） were higher. Water use efficiency decreased with the increase of photosynthetic active radiation. At the jointing stage KZ at F2 - F3 levels 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 - F3 levels was significantly higher than that of JY. For the production of drip irrigation silage maize at photosynthetic active radiation of 1 500 - 2 000μmol/（m^2·s^-1） and F3 levels, the production of KZ was higher than that of JY.

关 键 词：青贮玉米 行距 施氮量 滴灌 光合特性 复播 

分 类 号：S277.9[农业科学—农业水土工程]