王韵翔,吴裕如,王承,杨友才.播期对夏玉米生长发育及产量的影响[J].湖南农业大学学报:自然科学版,2019,45(5):.
播期对夏玉米生长发育及产量的影响
  
DOI:
中文关键词:  夏玉米  播期  生长发育  产量
英文关键词:summer maize  sowing date  growth  yield
基金项目:国家重点研发计划(2016YFD0300308)
作者单位
王韵翔,吴裕如,王承,杨友才 湖南农业大学生物科学技术学院湖南 长沙 410128 
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中文摘要:
      2018年在湖南省桃源县木塘垸乡,以临奥1号、湘农玉27号和郑单958为材料,设置5个播期处理,T1(5月8日)、T2(5月16日)、T3(5月24日)、T4(6月4日)、T5(6月14日),研究不同播期对夏玉米生长发育和产量形成的影响。结果表明:播期延后,玉米的生育期缩短,湘农玉27号、郑单958和临奥1号全生育期分别缩短5、5、4 d;从吐丝期至成熟期,早播处理(T1、T2)的干物质积累量大于晚播处理(T3、T4、T5)的,各品种均以T1处理的最大;至成熟期,湘农玉27号、临奥1号、郑单958的干物质积累量分别为24 576.2、25 087.7、26 367 kg/hm2;3个品种的叶面积指数在吐丝期最大,播期推迟,叶面积指数逐渐下降;3个品种T3、T4、T5处理的倒伏倒折率均高于T1、T2处理的,倒伏倒折率从高至低依次为湘农玉27号、临奥1号、郑单958;空秆率各处理间无显著差异,品种间差异也较小,空秆率从高至低依次为临奥1号、郑单958、湘农玉27号;3个品种的产量均以T1处理的最高,播期推迟,3个品种的产量均下降,且播种日期越晚,产量降低幅度越大;在本试验区域宜在5月上旬或中旬播种玉米。
英文摘要:
      To investigate the effects of different sowing dates on the growth and yield of three summer maize varieties, an assay consisting of five consecutive sowing dates(T1, T2, T3, T4, T5 treatments were on May 8th, May 16th, May 24th, June 4th, June 14th, respectively) was conducted in 2018. The results showed that 1) growth durations were shortened 5 d, 5 d and 4 d for varieties Xiangnongyu 27, Zhengdan 958 and Linao 1 respectively under delayed sowing dates; 2) dry matter accumulation was higher under earlier sowing date than that of later sowing date; 3) T1 treatment showed the maximum, with 24 576.2 kg/hm2, 25 087.7 kg/hm2 and 26 367 kg/hm2 for Xiangnongyu 27, Linao 1 and Zhengdan 958 respectively. Leaf area indexes were gradually degressive with sowing dates delayed. Lodging and folding rates of T3, T4 and T5 were higher than those of T1 and T2. The lodging and folding rates from high to low were Xiangnongyu 27, Linao 1, Zhengdan 958. There was no significant difference for empty pole rate among sowing dates or varieties. From the highest to the lowest, the empty pole rates were Linao 1, Zhengdan 958 and Xiangnongyu 27. Among the three varieties, the T1 treatment had the highest yields, and their yields decreased over the delayed days of the sowing date. In summary, in the studied area, our study indicated the corn should be planted in the middle and early May.
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