垄作小麦群体的光分布特征及其对不同叶位叶片光合速率的影响  

Light distribution in wheat population and its effect on leaf photosynthetic rate under raised-bed planting method

作　　者：李升东[1] 王法宏[1] 司纪升[1] 孔令安[1] 冯波[1] 张宾[1] 刘建军[1] 秦晓胜 

机构地区：[1]山东省农业科学院,济南250100 [2]山东省潍北农场,潍坊261109

出　　处：《中国生态农业学报》2009年第3期465-468,共4页Chinese Journal of Eco-Agriculture

基　　金：国际合作挑战计划项目(CPWFYRB200501);国家科技支撑计划项目(2006BAD01A02);国家高技术研究发展计划重点项目(2006AA100102);公益性行业(农业)科研专项经费项目(NYHYZX07-002);农业科技成果转化资金项目(05EFN213700156)资助

摘　　要：利用4个不同基因型小麦(TriticumaestivumL.)品种(大穗型品种"烟辐188"和"淄麦12"、多穗型品种"济麦22"和"济麦20")对比研究了垄作和传统平作两种栽培方式对小麦群体内部光分布特征及其对不同叶位叶片光合速率的影响。结果表明:垄作栽培方式显著改善了小麦冠层内光的垂直分布状况,使冠层内不同垂直高度的光照强度显著高于传统平作,并显著提高了小麦冠层内不同叶位叶片的光合速率;垄作栽培能够显著降低多穗型小麦品种冠层温度,而对大穗型小麦品种作用不明显;垄作栽培方式能够显著提高多穗型小麦品种归一化植被指数(NDVI),明显改善小麦生长状况;垄作栽培方式可显著提高小麦的千粒重,增加穗粒数,使小麦的行优势得到充分发挥。垄作栽培方式更适合分蘖成穗率较高、群体相对较大的多穗型品种。A comparative study was conducted on the distribution of light in wheat population and leaf photosynthetic rate in four wheat genotypes （the large-spike cultivars of ＂Yanfu188＂ and ＂Zimail2＂, and the multi-spike cultivars of ＂Jimai22＂ and ＂Jimai20＂） under raised-bed and conventional flat planting methods. The results show a significant improvement in canopy light vertical reception, leaf photosynthetic rate, 1000-kernel weight and per-spike grain number under raised-bed planting method （RBP）, in comparison to conventional flat planting （CFP）. RBP can significantly decrease the canopy temperature of the multi-spike cultivars, while it is not significant for the large-spike cultivars. The normalized difference vegetation index （NDVI） of the multi-spike cultivars is higher under RBP than CFP, showing significantly promoting effect of RBP on plant growth. Wheat cultivars that develop more till- ers and spikes are more suitable to RBP conditions.

关 键 词：小麦群体 垄作 光分布 光合速率 冠层温度 归一化植被指数 

分 类 号：S512.1[农业科学—作物学]