带田是在间作套种的基础上发展起来的一种新的种植方式,是耕作改制的一项重要内容。带状种植能充分地发挥土地的增产潜力,发挥边际效应,加大种植密度,提高光能利用率,是当前大幅度提高粮食产量的一个途径。我所1976年种植的78.11亩小麦、玉米带田混合亩产1,345.6斤,比实行带田以前粮食平均亩产高出399.6斤;其中14.81亩冬麦、玉米带田,平均亩收小麦648.5斤,玉米914.7斤,合计亩产达到1,563.2斤。几年来的生产实践证明,带田的增产效果显著,潜力很大。但必须注意以下几个问题:(一)带宽与种植规格两种作物各占带宽的比例,不仅影响到它们的面积和单位产量,还影响着粗、细粮在混合单产中的比例。带宽的设计原则应该是有利于发挥边际效应和便于用现有农机具进行操作。据测定,小麦的边际效应可达6行,与里行相比,千粒 Tada is a new planting method developed on the basis of intercropping and is an important part of farming system. Strip planting can give full play to the yield potential of the land, exert the marginal effect, increase the planting density and improve the utilization of light energy, which is a way to greatly increase grain yield. I plant in 1976, 78.11 acres of wheat, corn belt mixed with a yield of 1,345.6 pounds, higher than the average grain yield per mu before the implementation of belt 399.6 kg; of which 14.81 acres of winter wheat, corn fields, the average harvest of wheat 648.5 pounds, 914.7 kg of corn, a total of 1,563.2 pounds per mu. Over the past few years of production practice has proved that the field with a significant yield increase, great potential. However, we must pay attention to the following questions: (1) Bandwidth and planting specifications The proportions of the two crops in their respective bandwidths affect not only their area and unit output, but also the proportion of coarse and fine grains in mixed yields. The design principle of bandwidth should be conducive to play a marginal effect and easy to operate with existing agricultural machinery. It is determined that the marginal effect of wheat up to 6 lines, compared with the line, 1000 grain