高秆稀植大穗型玉米的密植潜力研究  

Study on Densities Potential of High-stalk and Rare-planting Maize

作　　者：史振声[1] 张飞[1] 

机构地区：[1]沈阳农业大学特种玉米研究所,沈阳110161

出　　处：《玉米科学》2009年第2期116-119,共4页Journal of Maize Sciences

基　　金："十一五"科技支撑计划项目"东北平原南部(辽宁)春玉米丰产高效技术集成研究与示范"(2006BAD02A12)

摘　　要：以11个高秆稀植大穗型辽宁省主栽玉米品种为试材,通过6个密度进行增密增产潜力试验。结果表明:适当增加密度可提高生物产量和叶面积指数并使光合速率、叶绿素含量和透光率保持较高水平;在42000株/hm2基础上,增加密度可显著提高产量。有10个品种可增加密度12.5%以上,其中有5个品种增产10%以上。个别品种增密和增产幅度超过20%。Eleven high-stalk, rare-planting type maize cuhivars were tested in six planting densities in order to study the yield potential. The results showed that with a moderate elevation of the density, biological yield and leaf area index could gain a concomitant increasing, and photosynthetic rate, chlorophyll content and transmittance were maintained a high level. On the basis of 42 000 plants/ha, the yield could increase with the elevation of the density. If the density increased by 12.5%, ten cuhivars could obtain more than 5% increase production, while if the density in- creased by 20%, most of the eultivars could obtain more than 10% increase production. Some individual varieties had larger scopes of increase density and increase production.

关 键 词：玉米 品种 产量 密度 

分 类 号：S513.04[农业科学—作物学]