[1]杨耿斌,纪春学,刘兴焱,等.不同密度对玉米新品种克玉19产量及构成因素的影响[J].黑龙江农业科学,2020,(05):4-7.[doi:10.11942/j.issn1002-2767.2020.05.0004]
　YANG Geng-bin,JI Chun-xue,LIU Xing-yan,et al.Effects of Different Planting Densities on Yield and Its Composition Factors of New Maize Variety Keyu 19[J].HEILONGJIANG AGRICULTURAL SCIENCES,2020,(05):4-7.[doi:10.11942/j.issn1002-2767.2020.05.0004]
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不同密度对玉米新品种克玉19产量及构成因素的影响

《黑龙江农业科学》[ISSN:1002-2767/CN:23-1204/S] 卷: 期数: 2020年05期 页码: 4-7 栏目: 出版日期: 2020-05-10
Title:
Effects of Different Planting Densities on Yield and Its Composition Factors of New Maize Variety Keyu 19
作者:
杨耿斌; 纪春学; 刘兴焱; 何长安; 王辉; 张恒; 周恪驰; 于倩倩
黑龙江省农业科学院 克山分院，黑龙江 齐齐哈尔 161000
Author(s):
YANG Geng-bin; JI Chun-xue; LIU Xing-yan; HE Chang-an; WANG Hui; ZHANG Heng; ZHOU Ke-chi; YU Qian-qian
Keshan Branch,Heilongjiang Academy of Agricultural Sciences,Qiqihar 161000,China
关键词:
玉米; 种植密度; 克玉19; 产量
Keywords:
maize; planting density;  Keyu 19;  yield
DOI:
10.11942/j.issn1002-2767.2020.05.0004
文献标志码:
A
摘要:
为指导玉米新品种克玉19合理密植，在种植密度6.00万~9.75万株?hm-2，按照梯度0.75万株?hm-2设6个密度处理，研究不同种植密度对玉米产量及其构成因素的影响，探讨克玉19的最佳栽培密度。结果表明：随着密度增加，产量先增后减，空秆率、秃尖增加，穗长、穗粗、行粒数、穗粒重、百粒重减少，株高、穗位升高，穗行数影响较小；克玉19在中等肥力水平下，适宜种植密度为8.25万株?hm-2左右。
Abstract:
In order to guide the rational close planting of the new maize variety Keyu 19，six planting densities were set according to the gradient of 7 500 plants?hm-2 at the range of 60 000 to 97 500 plant?hm-2，and study the effects of different planting densities on the yield and its composition factors,and discuss the optimum planting density of Keyu 19.The results showed that with the density increasing,the yield first increased and then decreased,the ratio of empty stalk and bald tip all increased,while the ear length,ear diameter,grain number per row,ear grain weight and 100-grain weight decreased,the plant height and ear height increased,and the grain number per row was relatively stable.The optimum planting density of Keyu 19 was 82 500 plants?hm-2 under middle fertility level.

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备注/Memo

收稿日期：2020-02-23

基金项目：黑龙江省科技厅重点研发项目（GA18B101）；现代农业产业技术体系专项资金 (CARS-02)；国家重点研发计划（2018YFD0300107-1）。
第一作者：杨耿斌（1980-），男，硕士，助理研究员，从事玉米遗传育种研究。E-mail：kshmaize@163.com。

更新日期/Last Update: 2020-08-20