摘要
为了解不同叶龄时期追肥对玉米生长发育、产量性状等综合因素的影响,掌握当地玉米最佳追肥时期,从而为当地玉米种植提供技术指导。本试验主要在玉米3展叶、5展叶、7展叶、9展叶不同叶龄时期进行追肥,对玉米生育时期、形态指标、产量因素等综合性状进行调查及分析。结果表明,玉米最佳追肥时期为9展叶,较对照增产1287 kg/hm2,且玉米生育后期长势较好。在玉米9展叶追肥产量最高达11607 kg/hm2。玉米穗位高在80~90 cm之间,抗倒伏能力强,综合性状表现较好,因此玉米9展叶是追肥的最佳时期。玉米3展叶追肥处理,在玉米前期生长较快,第2、3、4节较长,导致穗位高度增加,株高较高,容易发生倒伏,且出现早衰现象。玉米5展叶、6展叶、7展叶追肥,植株性状表现良好,但产量较对照没有显著增加。
The study aims to investigate the effects of topdressing in ：different leaf ages on growing development and yield, etc., master the best topdressing period of the local maize varieties, and provide technical guidance for local maize planting. In this study, we conducted topdressing in 3 leaf age, 5 leaf age, 7 leaf age and 9 leaf age of maize. Based on the investigation and analysis of growth period, morphological indicators and yield factors, the results showed that, the best topdressing period was in 9 leaf age, the yield increased by 1287 kg/hm2 compared with that of CK, and the late growth stage of maize was well. For topdressing in 9 leaf age, the yield was 11607 kg/hm2, the ear height of maize was 80-90 cm, lodging resistance was strong, and the comprehensive character was better. Therefore, the 9 leaf age was the best time for topdressing. For topdressing in 3 leaf age, maize growth was rapid in the early stage, the 2nd, 3rd and 4th internode was longer, leading to ear height increase and higher plant height, and being prone to lodging and the phenomenon of premature. For topdressing in 5 leaf age, 6 leaf age and 7 leaf age, plant characters showed good performance, but the yield was not significantly increased compared with the control.
出处
《农学学报》
2015年第9期41-45,共5页
Journal of Agriculture
基金
黑龙江省农垦科学院与庆丰分公司合作项目"玉米稳产增收创新技术研究与集成示范"(KY14-01)
关键词
玉米
叶龄
追肥相关性
Maize
Leaf Age
Correlation of Topdressing
作者简介
王乐宝，男，1974年出生，吉林人，中级农艺师，研究生，学士，研究方向：农业技术推广。通信地址：158421黑龙江省虎林市庆丰农场黑龙江省虎林市庆丰农场农业科，E-maihsuper2587@126．com。
