干旱胁迫及温度对玉米生长发育和产量影响的试验研究
发布时间:2018-08-31 12:18
【摘要】:基于2012~2014年辽宁省庄河市和锦州市进行的玉米分期播种试验资料,对辽宁地区玉米生长及产量受温度和水分影响情况进行分析。结果表明:在日照和水分条件都适宜的情况下,玉米在各生长发育期所持续的时间与相应期间的温度存在着负相关关系,播种~出苗阶段持续时间在日最低气温15℃以下随着温度升高而逐渐缩短,15℃以上则缩短趋势放缓。随着播期的延后吐丝~成熟阶段所持续的时间越来越长。在出苗~吐丝阶段,由于经历的温度条件相差不大,因此播期间的差别并不十分显著。吐丝~成熟期≥10℃的活动积温和气温日较差分别在1500℃·d左右和8~8.5℃的范围内对产量的形成更加有利。将水分作为环境的单一控制因素与对照组(CK)相比,三叶~拔节期受干旱胁迫后,该阶段所需的时间较CK组延迟了3天,且对后续的发育期的长短及单株叶面积仍有影响。在拔节~吐丝期,玉米的株高增长量受干旱胁迫的抑制作用最大,2011~2013年分别下降33.6%、41.1%及24.3%;同时,对茎粗、穗粒重及百粒重都有着显著的影响。在吐丝~乳熟期干旱胁迫对株高的影响不显著,但严重影响玉米产量,2011~2013年下降幅度分别为47.5%、54.6%和42.5%。
[Abstract]:Based on the experimental data of maize seeding by stages in Zhuanghe City and Jinzhou City Liaoning Province from 2012 to 2014 the effects of temperature and moisture on maize growth and yield in Liaoning Province were analyzed. The results showed that there was a negative correlation between the duration of maize growth and development period and the temperature of the corresponding period under the suitable conditions of sunshine and water. The duration of seeding to seedling stage decreased gradually above 15 鈩,
本文编号:2214965
[Abstract]:Based on the experimental data of maize seeding by stages in Zhuanghe City and Jinzhou City Liaoning Province from 2012 to 2014 the effects of temperature and moisture on maize growth and yield in Liaoning Province were analyzed. The results showed that there was a negative correlation between the duration of maize growth and development period and the temperature of the corresponding period under the suitable conditions of sunshine and water. The duration of seeding to seedling stage decreased gradually above 15 鈩,
本文编号:2214965
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