华北农学报2011，Vol.26Issue(5)：174-180,7.
不同种植密度对超高产稻田春玉米产量性状及光合生理特性的影响
Effects of Different Plant Densities on the Photosynthetic-Physiological Characters and Yield Traits in Spring Maize Grown on Super-High Yielding Paddy Field
摘要
Abstract
This study was conducted for the purpose in detecting the effects of different plant densities on pho-tosynthetic-physiological characters and yield traits of the "compact-type" maize variety Chaoshi No. 1 grown in spring season on a super-high yielding paddy field. The results showed that in the range of plant densities from 67 500 - 97 500 plants/ha, with increasing of plant density, population leaf area index ( LAI) , leaf area duration (LAD) ,and capture efficiency of photo-synthetically active radiation ( PAR) of canopy increased correspondingly; the relative chlorophyll content ( SPAD ) and spicel leaf weight ( SLW ) decreased on the contrary; and the photochemical quenching( qP) and non-photo-chemical quenching( qN) of ear-nod leaf at grain filling stage increased, too. Under high plant density ( D3 ) condition, the effective quantum yield (EQY) of ear-nod leaf and the electron transport rate ( ETR ) showed low, indicating slow-down of the sunlight energy transformation efficiency; the speed of dry matter accumulation ( DMC) of a single plant decreased, but the population DMC and grain yield increased; the grain No. Per ear and 1000-grain weight decreased.关键词
种植密度/春玉米/产量性状/光合生理特性Key words
Plant density/ Spring maize/ Yield characters/ Photo-physiological character分类
农业科技引用本文复制引用
李小勇,唐启源,李迪秦,李维科,李海林,蔡庆红..不同种植密度对超高产稻田春玉米产量性状及光合生理特性的影响[J].华北农学报,2011,26(5):174-180,7.基金项目
国家"十一五"科技支撑计划(2006 BAD02A13-4) （2006 BAD02A13-4）
