化控对不同种植密度下东北春玉米光合特性及产量的影响  

Effects of Chemical Regulation on Photosynthetic Characteristics and Yield of Spring Maize under Different Plant Densities in Northeast China

作　　者：杨振芳[1,2] 顾万荣[1,2] 魏湜[1,2] 李丽杰[1] 张倩[1,2] 李晶[1,2] 陈喜昌[3] 杨德光[1,2] 

机构地区：[1]东北农业大学农学院,哈尔滨150030 [2]农业部东北地区作物栽培科学观测实验站,哈尔滨150030 [3]黑龙江省农业科学院玉米研究所,哈尔滨150086

出　　处：《玉米科学》2015年第5期66-74,共9页Journal of Maize Sciences

基　　金："十二五"农村领域国家科技支撑计划课题"东北平原北部(黑龙江)春玉米水稻持续丰产高效技术集成创新与示范"(2011BAD16B11);黑龙江省科技攻关项目"第三;四及温带玉米新品种选育及高产技术示范"(GA12B101-02)

摘　　要：选用东农253为试验材料,设5万、6万、7万、8万株/hm2共4个种植密度,于拔节期叶面喷施"玉黄金",研究化控对不同种植密度下东北春玉米叶片光合特性及产量的影响。结果表明,与清水处理相比,"玉黄金"的施用改善了叶片的光合性能,增加了叶片的叶绿素SPAD值和净光合速率Pn,提高最大光化学效率Fv/Fm、实际量子产量Y(Ⅱ)、光化学淬灭系数q P,降低非调节性能量消耗的量子产量Y(NO)、非光化学淬灭系数q N。在7万株/hm2种植密度下,"玉黄金"处理获得最高产量,达11 428.18 kg/hm2。Dongnong253 was used as the material in this experiment and was planted under the densities of50 000, 6 0000, 70 000, 80 000 plants/ha, and sprayed the chemical regulator of‘Yuhuangjin＇with DA-6 and Eth-ephon as the main material at the jointing stage to analyze the effects of chemical regulation on photosynthetic char-acteristics and yield of spring maize under different densities in Northeast China. The results showed that, com-pared with the water treatment, the treatment of‘Yuhuangjin＇could improve the photosynthetic performance ofleaves, increase chlorophyll SPAD value and net photosynthetic rate Pn, increase the maximum photochemical effi-ciency Fv/Fm, actual quantum yield Y（Ⅱ） and photochemical quenching q P, and reduce quantum yield Y（NO） ofnon- regulatory energy consumption and non- photochemical quenching coefficient q N. The highest yield was11428.18 kg/ha after the treatment of‘Yuhuangjin＇with the planting density of 70 000 plants/ha.

关 键 词：玉米 化控剂 净光合速率 叶绿素荧光特性 

分 类 号：S513.01[农业科学—作物学]