施氮水平对啤酒大麦叶片光合S、PAD和叶绿素荧光特性的影响  

Effects of Different Nitrogen Levels on Photosynthetic Characteristics and Chlorophyll Fluorescence of Leaves in Malting Barley

作　　者：蔡剑[1] 邹薇[1] 陈和 沈会权 戴廷波[1] 荆奇[1] 曹卫星[1] 姜东[1] 

机构地区：[1]南京农业大学农业部作物生长调控重点开放实验室,江苏南京210095 [2]江苏省盐城农科所,江苏盐城224002

出　　处：《麦类作物学报》2007年第1期97-101,171,共6页Journal of Triticeae Crops

基　　金：国家自然科学基金项目(30571093);江苏省创新人才基金项目(BK2005419);高等学校博士学科点专项科研基金项目(20050307006)

摘　　要：为给啤酒大麦高产栽培提供依据,选用苏啤3和单2两个大麦品种为试验材料,在江苏南京和盐城,研究了不同施氮水平对大麦光合、叶绿素含量和叶绿素荧光特性及产量的影响。结果表明,在0-225kg.ha-1施氮量范围内,两个大麦品种叶片叶绿素相对含量(SPAD)、净光合速率(Pn)、最大光化学效率(Fv/Fm)、实际光化学效率(ΦPSII)均随着施氮量的提高而提高,施氮量再提高,上述参数又呈下降趋势。大麦籽粒产量亦呈现相同的趋势,最终以225 kg.ha-1施氮量处理的大麦籽粒产量最高。分析表明,光系统II(PSII)较高的ΦPSII是适宜施氮量下提高大麦叶片Pn的重要生理基础,而适宜施氮量下较高的叶片Pn是本试验中啤酒大麦高产的生理基础。Two barley varieties, Supi3 and Dan2 were planted in both Nanjing and Yancheng, Jiangsu Province to study the response of photosynthesis and chlorophyll fluorescence parameters to nitrogen levels in malting barley. In the nitrogen level ranges of 0 to 225 kg/ha, chlorophyll relative content （SPAD）, photosynthetic rate （Pn）, the maximum photochemistry efficiency （Fv/Fm） and quanta yield （ΦPSII） of the photosynthetic system II （PSII） increased with raising of nitrogen levels. However, these parameters decreased with further nitrogen enhancement. Grain yield of barley showed the same tendency in response to varying nitrogen level, and was highest at N rate of 225 kg/ha. Consequently, barley yield was highest at N amount of 225 kg/ha for both varieties. It indicated that higher Fv/Fm and ΦPSIIwere the physiological basis of higher leaf Pn, while higher leaf Pn was physiological basis of higher grain yield at N amount of 225 kg/ha, as comparison to those at the other N levels.

关 键 词：啤酒大麦 施氮水平 叶绿素含量 叶绿素荧光 

分 类 号：S512.3[农业科学—作物学] S311