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一、轮作倒茬1.适宜前茬对高粱的增产作用:据调查,如以各种作物重茬为对照,大豆茬种高粱、玉米、谷子,分别增产90％、21％、20％;棉花茬种高粱、玉米、谷子,分别增产46 ％、9％、11％。与谷子、玉米相比,高粱在大豆、棉花茬上的增产幅度较大。玉米、大豆间作也是高粱的良好前茬,在这种茬口上,高粱比重茬增产20～30 ％。此外,烟草、花生、甘薯、马铃薯等也都是高粱的适宜前茬。在风砂干旱地区和瘠薄山区的粮草轮作中,以绿肥或牧草作前茬,高粱产量常常优于玉米、谷子等粮谷作物。
First, crop rotation 1. Appropriate pre-harvest on sorghum yield: According to the survey, such as a variety of crop as a control, soybean crop sorghum, corn, millet, respectively, an increase of 90%, 21%, 20%; cotton stubble Sorghum, corn, millet, respectively, an increase of 46%, 9%, 11%. Compared with millet, corn, sorghum in soybeans, cotton crop yield greater. Intercropping of corn and soybean is also a good pre-harvest of sorghum. On this stubble, the proportion of sorghum increased by 20-30%. In addition, tobacco, peanut, sweet potato, potato, etc. are also suitable for the previous crop of sorghum. In the rotation of forage grass in the arid and impoverished mountainous areas with green manure or pasture, the yield of sorghum often outperforms the grain crops such as corn and millet.