北安地区大豆收获适时性损失规律研究

Experiments on the Regularities of Timeliness Loss Changing with Soybean Harvesting Date in Beian

大豆生产关键作业环节适时性损失规律是影响大豆产量及效益的重要因素,也是优化大豆生产机器系统的重要依据。以北安地区大豆收获作业为研究对象,采用去除边界效应、控制单一变量、随机区组等试验法设计试验方案,确定每日收获大豆小区分布;依据罗曼诺夫斯基准则剔除异常试验数据,运用SPSS统计分析软件对试验数据进行回归分析,得到北安地区大豆收获量及收获适时损失率随收获日期呈二次函数规律变化。试验条件下,北安地区大豆最佳收获日为10月6日。试验结果为合理确定该地区大豆收获日期提供理论依据,为农业机器系统优化提供参考。

One significant factor which effects soybean yield and economic benefit is timeliness loss regularities of key opera- tions. And the timeliness loss is also the vital basement for optimizing soybean production machinery system. Soybean harves- ting operation in Beian region, Heilongjiang province was taken as the research object, and the experiment was designed adop- ting methods of removing boundary effect, taking the harvesting date as the only variable, test plots distributing in random in order to obtain the real date. Abnormal testing data were eliminated by Romanowski criterion and SPSS statistics software was utilized for constructing the mathematic model for timeliness loss changing with the harvesting date, which is shown as a quad- ratic discipline in Beian region. The best soybean harvesting date in Beian was Oct 6th under the testing condition. The con- clusion of the paper supplies reasonable theoretical basis for determining harvesting date in the experiment region and provides reference for optimizing agricultural machinery system.