玉米适宜播种期分期播种试验

Interval Sowing Trial of Suitable Sowing Stages for Maize

适宜播种期是影响玉米生育和产量的主要因素之一。通过对玉米生育期光、热、水要素的分析研究，表明影响成县地区玉米生育的气候要素发生了较为明显的变化，温度上升，热量增多，降水量和光照时数减少，气候影响效应利弊参半。受气候变化影响，玉米各发育期普遍提前，生育前期发育期间隔变化不明显，后期有所缩短。受气候变化影响，春季10cm地温和气温稳定通过10℃日期提前，春玉米可以在3月末至4月初开始播种，比过去常规开始播种期提前1周，以4月上旬为适宜播种期，与分期播种试验结果一致。试验表明，早播和适播的玉米秋季成熟期仅提前了2～3d。对躲避秋季连阴雨和秋播整地效益并不明显。

Suitable for sowing is one of the main factors affecting the growth and yield of maize.Through analysis of light,heat and water corn growth factors,indicating that the impact of a county regional maize and climatic factors occurred more obvious changes,temperature rise,heat increase,and light and precipitation while reducing,the number of climate effects mixed blessing.Affected by climate change,the development of common corn each advance ,each change was not obvious during the early growth stage of development,the latter was shortened.Affected by climate change, mild temperatures in spring 10 cm stability through 10℃date was in advance, you could start planting spring corn in late March to early April, the conventional start sowing earlier than in the past week, with favorable early April sowing, planting and staging consistent test results.Tests showed that early sowing and suitable sowing corn fall maturity only 2～3 days in advance ,to avoid even the rain fall and autumn soil preparation benefits were not obvious.