在2011-2012年两年期间,在黑龙江八一农垦大学实习试验基地选用郑单958为供试材料,以传统栽培模式为对照(CK), 研究了超高产栽培(SHY)条件下春玉米的冠层结构。结果表明,超高产条件下春玉米产量及有效穗数均显著高于对照；玉米在SHY条件下,其群体叶面积指数(LAI)均高于传统栽培模式(CK),且LAI最大值的持续天数比对照要长；SHY玉米在棒三叶及棒三叶以上叶增加幅度明显,与CK均达到显著水平；SHY玉米叶倾角明显小于对照,叶向值增大,群体受光态势较好；SHY和CK的叶片光合速率(Pn)均随生育时期的推移而不断降低,在全生育期SHY均高于CK,并且在大喇叭口期差异达显著；此外,整个生育时期SHY的光合势均高于CK。超高产栽培LAI持续天数长,叶倾角小,叶向值大,进而改善玉米群体受光态势,提高叶片光合能力,具有高光效的冠层结构。#$NL 关键词：玉米；超高产栽培；冠层结构；光合能力
英文摘要:
During the 2012-2013 years, the experimental materials were selected as the experimental materials, and the canopy structure of spring maize under the condition of high yield cultivation (SHY) was studied with the traditional culture model as the control (CK), and the was used as the control . The results show that, under the condition of super high yield spring maize yield and effective panicle number was significantly higher than the control; maize under the condition of SHY, the leaf area index (LAI) were higher than that of traditional cultivation pattern (CK), and the maximum duration of LAI longer than the control; SHY increased significantly more than in corn stick and Clover stick leaf, and CK reached a significant level; SHY maize leaf angle was small and the control, leaf orientation value increases, population light distribution is better; leaf SHY and CK photosynthetic rate (Pn) were all decreased with the growth process, in the whole growth period of SHY was higher than that of CK, and in the large the bell was significant; in addition, the whole growth period of SHY photosynthetic potential was higher than that of CK. Super high yield cultivation Lai full duration long, leaf angle small leaves to value. In order to improve the maize population situation by light, improve leaf photosynthetic capacity, canopy structure with high efficiency.
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