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探究大豆产量与播种日期的变化的关系可以为确定最佳播种期、合理安排大豆播种作业提供科学依据。本文设计大豆播种适时性损失试验流程,采取随机区组试验方法确定每日播种小区分布位置;按设计日期在相应小区播种大豆、采取相同的田间管理方法,所有试验小区大豆同日收获。在收集到每个小区大豆产量的数据后,采用格拉布斯准则剔除数据,并采用SPSS 22.0回归分析得出大豆适时损失率随播种日期呈抛物线规律变化,试验地区大豆最佳播种日期为5月16日。
Studying the relationship between the soybean yield and the sowing dates can provide a scientific basis for determining the optimal sowing date and arranging the sowing operations reasonably. In this paper, we designed the soybean sowing timely loss testing process, and adopted randomized block test method to determine the location of daily sowing plot. According to the design date, sowing soybean in corresponding plot and adopting the same field management method, all the experimental plot soybean was harvested on the same day. After collecting the data of soybean production in each plot, the data were eliminated using the Grubbs criterion. The SPSS 22.0 regression analysis showed that the timely loss rate of soybean showed a parabolic curve with the sowing dates. The optimum sowing date for soybean in the experimental area was May 16th