摘要
以4个玉米品种为试验材料,比较研究了超高产玉米干物质积累和分配的特点。结果表明:高的生物产量是获得高产的物质基础;高产和超高产品种的物质生产优势表现在生育中期和后期,玉米植株个体干物质积累呈S形曲线变化;玉米干物质在各器官的分配随生长中心的转移而发生变化,小喇叭口以前干物质主要分配在叶片,之后转为茎、叶;散粉后,各器官干物质开始向子粒转移,高产品种子粒产量主要来源于生育后期叶片制造的光合产物即成为光合产物的分配中心,并与抽雄后具有较高的叶面积指数且持续时间较长密切相关。
The properties of dry matter product of four different varieties were studied. The results indicated that more total dry matter accumulation was the basis of higher yield. The production superiority of high-yield and super high-yield maize was exhibited during the middle and the late growth stage. The CGR of high-yield and super high-yield varieties was obviously higher than that of low-yield variety during the middle and the late growth stage. The photosynthetic products made by leaves during the late growth stage was main sources of grain yield of high-yield varieties. This result was closely connected with higher LAI and longer duration after the full-heading stage.
出处
《玉米科学》
CAS
CSCD
北大核心
2007年第3期95-98,共4页
Journal of Maize Sciences
基金
国家粮食丰产工程(2004BA520A09)
关键词
玉米
干物质积累与分配
产量
Maize
Dry matter accumulation and distribution
Yield
