摘要
基于2012—2014年在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能受温度影响情况进行分析。试验分为5个播期,播期间隔10~15 d不等,种植密度约为4.2株·m^(-2),每个播期分为4个重复小区,分别观测玉米生长指标。结果表明:在日照和水分条件适宜的情况下,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℃以上则逐渐增加。吐丝~成熟阶段持续时间则随着播期的延后而延长。玉米在出苗~吐丝阶段,各播期温度条件相当,差别并不显著。吐丝~成熟期≥10℃的活动积温和气温日较差分别在1 500℃·d左右和8℃~8.5℃的范围内对产量的形成更加有利。
The effect of temperature on maize growth and yield capacity in Liaoning Province were analyzed based on experimental data of different sowing dates in test plots of Zhuanghe and Jinzhou city from 2012 to 2014. With an interval of 10 to 15 days and （stand） planting density of 4.2 plant＇m-2, the test was undertaken in 5 different sowing dates, each of which was divided into 4 subsections so as to observe maize growth indices. The results showed that there was a negative correlation relationship between the duration of the maize growth at each development period and the correspond-ing temperature while the sunlight and soil moisture conditions were appropriate in the two places. The duration period of sowing to seedling emergence was short when the daily minimum temperature was below 15°C , while i t gradually in-creased when the temperature was over 15°C . The duration of tasseling to maturation period prolonged as the sowing date was delayed. There was no significant difference in the period of seedling emergence to tasseling while different sowing dates were in the same temperature condition. More beneficial to maize yield was that the 10℃ active accumulated temperature was about 1 500 ℃ and the daily range of temperature was about 8.0℃ -8 .5℃ from tasseling to matura-tion period.
出处
《干旱地区农业研究》
CSCD
北大核心
2017年第5期14-20,共7页
Agricultural Research in the Arid Areas
基金
辽宁省公益性行业(气象)科研专项"东北地区春玉米农业气象指标体系研究"(GYHY201206018)
辽宁省农业领域青年科技创新人才培养计划项目"基于作物模型的干旱胁迫对玉米生长和产量影响机制及评估研究"(2015060)
辽宁省气象局博士启动项目"基于气候适宜度模型的辽宁玉米生长状况评价及灾害诊断"(D201504)
关键词
分期播种
玉米
生长发育
产量
different sowing dates
maize
growth
yield
