通辽地区玉米分期播种试验及适时播种期探讨

文章探究了播种期对气候资源利用及玉米产量的影响,分析了气候变暖对玉米适宜播种期的影响。通过分期播种试验确定通辽地区玉米适宜播种期。早播玉米与迟播玉米虽然在播种—出苗,出苗—七叶,七叶—拔节期及乳熟期—成熟期间的间隔天数及≥10℃积温差异较大,但全生育期天数及总积温差异较小;早播玉米部分生育期间隔时间增长,迟播玉米播种—出苗期间隔时间缩短。为充分利用气候资源提供科学依据。

Discuss on Experiment of Sowing by Stages and Timely Sowing Time of Maize in tongliao

This article explored the influences of sowing time on the utilization of climate resources and maize yield, and the influences of climate warming on maize suitable sowing time.The suitable sowing time of maize was confirmed through sowing by stages test. There were obvious differences in interval days from sowing time to e- mergence time, emergence time to seven leaves time, seven leaves time to jointing stage, milk-ripe stage to ma- ture stage and ≥10℃ accumulated temperature between early sowing and delayed sowing maize, but the differ- ences of whole growth periods and total accumulated temperature were unconspicuous. The interval time of part growth period of early sowing maize was increased and the interval time from sowing time to emergence time of delayed sowing maize was curtate. It provided scientific basis for taking full advantage of climatic resources.