不同播种期对玉米生长发育和产量的影响研究

为了应对气候变化，避免春旱对玉米生长发育的影响，通过采用分期播种试验方法，研究玉米生长发育和产量的变化，结果表明：早播能使玉米生育期延长，生长发育好，叶绿素含量高，干物质积累多，产量高；而晚播玉米易受春旱影响，生长发育差，产量偏低，因此，在西峰塬区将传统的玉米播种期4月下旬提前到4月上、中旬，可以避免春旱的危害，有利于玉米生长发育，达到增产增收的目地。但春播日期的提前要根据年景变化，因地制宜，在春旱严重年份或较轻年份，春播日期提前对玉米生长发育和增产效果明显，而在雨水充沛、无春旱年份按照常规时间开展春播，对玉米生长有利。

Impacts of the Different Seeding Time on Growing Development and Production of Corn

Abstract: in order to cope with climate change, avoid the influence of drought on maize growth and development, through the use of test methods for sowing, change, research on maize growth and yield. The results showed that: early sowing corn can be prolonged growth period, growth, chlorophyll content, dry matter accumulation, yield is high; and the late sowing corn affected by drought, poor growth and development, yield is low, therefore, in the Xifeng loess plateau region will be the traditional sowing in late April to mid April, early on, can avoid the harm of drought, is conducive to the growth and development of maize, yield.