小麦实行条带配置,间套其他作物,在我国小麦生产中占有较大比重。据研究,小麦在带田情形下,只要带型选择恰当,一般可以做到产量不减。其原因之一是由于空带的存在而产生了边际效应。所谓边际效应,指的是靠近空带的若干行小麦由于光、二氧化碳、水、肥等因素相对优越而表现出生长发育较对照行好的现象。而把比对照行增加的产量称边际效应值。边际效应的存在已为绝大多数研究和生产实践所证实。但边际效应的计算方法,目前还存在一些问题,有必要进行推敲琢磨,使之更能说明问题。因为计算方法正确与否,涉及到人们对边际效应在生产中的作用和对带形种植的认识。 Stripe configuration of wheat, intercropping other crops, occupy a large proportion of wheat production in our country. According to the study, wheat in the field with the case, as long as the appropriate type of belt, the general can do not diminish output. One of the reasons is that there is a marginal effect due to the presence of empty space. The so-called marginal effect, refers to the number of rows of wheat near the empty zone due to light, carbon dioxide, water, fertilizer and other factors relatively superior to the performance of growth and development than the control line phenomenon. However, the increase in production over the control line is called the marginal effect value. The existence of marginal effects has been confirmed by most research and production practices. However, there are still some problems in the calculation of the marginal effect. Therefore, it is necessary to make careful consideration so that the problem can be explained more clearly. Because the calculation method is correct or not, it involves the people’s effect on the marginal effect in production and the understanding of the strip planting.