特早熟夏玉米不同时期追肥处理干物质积累与分配  

The Dry Matter Accumulation and Distrbution of Especial-early Summer Corn at Different

作　　者：刘秀红 郝建平[2] 杨锦忠[2] 杜天庆[2] 崔福柱[2] 

机构地区：[1]山西省长治农校,山西长治046000 [2]山西农业大学农学院,山西太谷030801

出　　处：《山西农业大学学报》2001年第2期113-115,共3页

基　　金：山西省科委重点科技攻关项目 (96 10 0 7-1) ;山西省高校青年学科带头人专项

摘　　要：本文研究了晋中盆地麦收后直播特早熟夏玉米单交种冀承单 3号 ,在不同时期追施氮肥处理的干物质积累与分配动态。结果表明 :不同时期追肥处理不影响特早熟夏玉米茎、叶、叶鞘、雌穗及地上部干物质积累的动态趋势 ,但对特早熟夏玉米干物质积累与分配的效应则表现出一定差异 ,到成熟期 ,大喇叭口期追肥处理地上部及雌穗干物质积累较拔节期追肥处理高 4 12g/株及 0 97g/株 ,且前者经济系数为 0 42 ,后者则为 0 4。The paper studied the dry matter accumulation and distribution of different N top dressing times treatments on especial-early summer corn,Jichengdan 3,which is sowed after harvesting wheat in Jinzhong basin .The results showed that the trends of accumulating dry matter were the same as ones in stems,leaves, leaf sheaths and above-ground plants,ears under two kinds of top dressing times,but the amount of Accumulation and distribution of dry matter were different .during the mature period ,above-ground plants and ears of top dressing treatment at the 9th spreading-leaf were 4 12 g/plant,0 97 g/ear weightier than the ones of the 5th spreading -leaf ,and economic coefficient at the 9th spreading-leaf was 0 42,while the one of the 5th spreading -leaf was 0 4. So top dressing at the 9th spreading-leaf not only increased the amount of dry matter accumulation but also improved the amount of dry matter transferring to grain in final time.

关 键 词：特早熟夏玉米 干物质积累 追肥时期 氮肥 干物质分配 

分 类 号：S513.062[农业科学—作物学]