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我省向日葵种植面积发展很快,1981年达277万亩。随着栽培面积的扩大和种植年限的增加,轮作倒茬问题越来越突出。为了弄清向日葵在轮作中的地位、前后茬的关系,以便确定合理的轮作方式,这几年我们结合生产实践,做了些试验和调查。向日葵的茬口地位,次于大豆、棉花、玉米、高粱茬;好于白菜茬;相当或接近谷子茬。据试验,向日葵适宜的前作次序是玉米、高粱、大豆,即前茬玉米的向日葵折亩产
Sunflower planting area in our province developed rapidly in 1981 reached 2.77 million mu. With the expansion of cultivated area and the increase of planting years, the problem of crop rotation is more and more prominent. In order to understand the status of sunflowers in the rotation, before and after the relationship between crop rotation in order to determine a reasonable manner, in recent years, we combine production practices, do some experiments and investigations. Sunflower stubble position, second to soybeans, cotton, corn, sorghum stubble; better than cabbage stubble; quite or near millet stubble. According to the experiment, sunflower suitable for the order before the corn, sorghum, soybeans, that is, the former crop of sunflower yield per acre