不同玉米品种灌浆期穗位叶光合特性日变化及青贮产量差异研究  

Diurnal Variation of Photosynthetic Characteristics of Panicle Position Leaf during Filling Period and Difference of Silage Yield of Different Maize Varieties

作　　者：白岚方 路战远 张向前 贾凯 王玉芬[1,2] 孙鸿举 BAI Lanfang;LU Zhanyuan;ZHANG Xiangqian;JIA Kai;WANG Yufen;SUN Hongju(College of Life Science,Inner Mongolia University,Hohhot 010070,China;Key Laboratory of Herbage and Endemic Crop Biotechnology,Ministry of Education,Hohhot 010070,China;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China)

机构地区：[1]内蒙古大学生命科学学院,内蒙古呼和浩特010070 [2]牧草与特色作物生物技术教育部重点实验室,内蒙古呼和浩特010070 [3]内蒙古自治区农牧业科学院,内蒙古呼和浩特010031

出　　处：《河南农业科学》2020年第4期29-37,共9页Journal of Henan Agricultural Sciences

基　　金：国家重点研发计划项目(2016YFD0300309-1);内蒙古自治区自然科学基金项目(2018MSO3073);内蒙古自治区科技创新引导项目(KCBJ2018056)。

摘　　要：分析先玉335、利禾1号、东裕120、京科青贮301、金创998、种星青饲1号共6个玉米品种灌浆期穗位叶的光合特性日变化、光响应曲线以及青贮饲草产量、品质的差异,旨为呼和浩特地区青贮玉米高产高效栽培以及品种选择提供依据。结果表明,除利禾1号灌浆期穗位叶的净光合速率日变化呈单峰曲线变化趋势外,其他5个玉米品种均呈双峰曲线变化趋势;各品种气孔导度日变化均呈双峰曲线变化趋势,胞间CO2浓度日变化呈广口“V”字形变化趋势;不同玉米品种间的光响应曲线拟合较好(P<0.05),且种星青饲1号模拟的最大净光合速率[34.97μmol/(m^2·s)]较其他品种高3.70%~31.11%。种星青饲1号的青贮饲草鲜质量最高,为60601.53 kg/hm^2,其次是利禾1号。各品种青贮品质优良。通过综合分析得出,种星青饲1号和利禾1号适合在呼和浩特地区青贮种植。Analysis of diurnal changes in photosynthetic characteristics,light response curves of panicle position leaf and silage forage yield,quality of Xianyu 335,Lihe 1,Dongyu 120,Jingke silage 301,Jinchuang 998 and Zhongxing silage 1,will provide a basis for high-yield and efficient cultivation of silage corn and selection of varieties in Hohhot.The results showed that except the daily photosynthetic rate of Lihe 1 being single-peak curve,the diurnal variation of photosynthetic rate of the other five maize varieties showed a bimodal curve.The diurnal variations of stomatal conductance of all varieties appeared a bimodal peak.Diurnal variation of intercellular CO2 concentration presented the variation tendency of“V”type.The light response curves of different maize varieties were well fitted(P<0.05).The maximum net photosynthesis rate[34.97μmol/(m^2·s)]of Zhongxing silage 1 was 3.70%—31.11%higher than other varieties by calculation.The forage silage yield of Zhongxing silage 1 was the highest,with the value of 60601.53 kg/ha,followed by Lihe 1.All kinds of silage had good silage quality.Through comprehensive analysis,it can be seen that Zhongxing silage 1 and Lihe 1 are suitable for cultivation in Hohhot.

关 键 词：玉米 品种 穗位叶 光合日变化 光响应 青贮 产量 品质 

分 类 号：S513[农业科学—作物学]