玉米不同叶位叶片SPAD值的变化及其与生物量的相关性  

CORRELATION BETWEEN VARIATIONS OF SPAD VALUE OF LEAF AT DIFFERENT POSITION AND BIOMASS OF MAIZE

作　　者：童淑媛[1,2] 宋凤斌[1] 徐洪文[1,2] 

机构地区：[1]中国科学院东北地理与农业生态研究所,吉林长春130012 [2]中国科学院研究生院,北京100049

出　　处：《核农学报》2008年第6期869-874,共6页Journal of Nuclear Agricultural Sciences

基　　金：国家863计划项目(2006AA10Z227)

摘　　要：用大田试验研究了平展型玉米农大364和紧凑型玉米郑单958不同叶位叶片SPAD值的变化规律及不同生育时期功能叶片的SPAD值与生物量的相关关系。结果表明:(1)同一品种玉米叶片的SPAD值随叶位的升高而增加,至植株中间部位叶达到最大值,之后降低。品种间无差异;(2)2个品种相同叶位叶片的SPAD值随生育进程的变化趋势一致,均随叶片生长增加,中期稳定一段时间后又随叶片的衰老而下降。紧凑型玉米下部叶片生育中后期SPAD值显著低于平展型玉米;而平展型玉米顶部叶片在生育中后期及中部叶片在生育后期的SPAD值显著低于紧凑型玉米;(3)苗期至吐丝期,玉米功能叶片的SPAD值与单株生物量呈显著正相关,但吐丝期以后无明显关系。SPAD value of leaf at different position of maize of loosely type and compact type Zhengdan 958, and the correlation of SPAD value of functional leaf in different growing stage to biomass were studied in field experiment. The results are as follow： （1）SPAD value increased with the rising of leaf position in the same maize variety, and reached the maximum in the leaf at middle of plant,then declined. There was no difference between two varieties; （2）The variation trend of the SPAD value in the same leaf position of two varieties was alike with the growth. SPAD value firstly increased with the growth of leaf, then kept during a stable middle age and followed by a decline with the aging of leaf. The SPAD value of lower leaf in compact type maize was significantly lower than loosely type in the middle-later period of growth, however, the SPAD value of top and middle leaf in loosely type maize were significantly lower than compact type maize in middle-later and later period of growth. （3） From seedling stage to silking stage, SPAD value of functional leaf had a positive relation with the single plant biomass, but there was no significant relationship between them after silking stage.

关 键 词：玉米 不同叶位 SPAD值 生物量 

分 类 号：S513[农业科学—作物学]