陕西关中灌区高产夏玉米品种光合物质生产特性  

Photosynthesis and Dry Matter Production of Summer Corn under High Yield Condition in Guanzhong of Shaanxi Province

作　　者：王荣成 胡富亮[2] 张仁和[2] 路海东[2] 郝引川[2] 薛吉全[2] 

机构地区：[1]陕西省农业技术推广总站,西安710003 [2]西北农林科技大学农学院,陕西杨凌712100

出　　处：《西北农业学报》2012年第9期59-62,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：陕西省科技统筹创新工程计划项目(2011KTZB02-01-02)

摘　　要：在多年高产试验基础上,对郑单958号、先玉335和陕单8806三个玉米品种叶面积、光合物质积累与转运、籽粒灌浆等特性进行分析。结果表明,3个品种灌浆后期在保持较高光合速率的同时可维持叶面积指数下降缓慢,灌浆期间可较快达到最大灌浆速率并维持较快灌浆速率和较长生长活跃期,促进花后干物质利用。这可能是其获得高产的重要生理原因。Based on the result of high-yielding maize hybrids,three summer maize hybrids（Xianyu 335,Zhengdan 958 and Shaandan 8806） were conducted to dry matter partitioning and photosynthetic characteristics of leaves in order to evaluate yield formation of three high-yielding maize hybrids during grain filling period.The results showed that yields of three summer maize hybrids were over 8 000 kg/hm2.Characteristic of grain filling analyzed by Richards equation showed three summer maize hybrids had the higher grain-filling rate,the longer active growing period,and it reached the maximum grain-filling rate,which indicated grain-filling traits was favorable to high yield in the experiment.Three summer maize hybrids had high net photosynthetic rate after anthesis,and the leaf area index（LAI） and decreased slowly from 20 d and 30 d after flowering,respectively.To obtain 8 000 kg/hm2 its need to maintain the leaves photosynthetic physiology quantity to maintain high grain-filling rate and long active growing period after anthesis,enhance the contribution after anthesis assimilates to grains.which may be one of the important roles in getting high-yield.

关 键 词：夏玉米 高产 灌浆特性 光合速率 干物质 

分 类 号：S513[农业科学—作物学]