摘要
目的研究冀西北玉米的库、源关系。方法相同环境和栽培条件下种植2个紧凑型品种——先玉335、郑单958和2个平展型品种——长城799、张玉117,在产量形成过程中对4种玉米的源、库协调关系进行比较研究。结果群体条件下超高产品种先玉335和郑单958的叶面积指数和光合势均高于普通品种,开花后群体叶面积指数和光合势增大,而且花后光合势与产量之间存在极显著的正相关(r=0.988**)。结论提高玉米产量的关键是提高开花后群体光合势,即在较高的叶面积指数的基础上,进一步延长叶片的功能期,有利于库容的扩大和充实,从而获得高产。
Objective To study corn source-sink relationship in northwest Hebei.Methods 2 com-pact varieties of corns,Xianyu 335 and Zhengdan 958,and 2 plate varieties of corns,Changcheng 799 and Zhangyu 117 were planted in the same environment and cultivating condition.Comparative study was con-ducted on source-sink relationship of 4 varieties of corns.Results The results indicated that under popu-lation condition the LAI and LAD of super high-yielding Xianyu 335 and Zhengdan 958 were all higher than that of the common varieties.The population LAI and LAD increased after anthesis.LAI after anthesis was significantly associated with grain yield (r=0.988**).Conclusion The key to increas yield is that based on improving population LAD after anthesis,i.e.,to further extend the functional period of the leaves based on the higher leaf area index helps expand and enrich the capacity to obtain high yield.
出处
《河北北方学院学报（自然科学版）》
2013年第6期45-50,共6页
Journal of Hebei North University:Natural Science Edition
基金
张家口市科学技术研究与发展计划项目(0801066C)
关键词
冀西北
玉米
源库关系
比较研究
northwest Hebei
corn
source-sink relationship
comparison study
