水稻、棉花是我省的主要作物。由于稻、棉面积不能缩减,而水田、旱地又各有限度,因而造成连作多、轮作少,水田、旱地分家,作物单产低,经济效益很差。为此,我们于1979—1982年协作进行了稻棉轮作综合效应的研究。旨在不减少稻、棉面积的前提下,采用水田与旱地轮种的办法,扩大稻、棉种植的范围,改善农田生态环境,以提高作物的产量和经济效益。 一、试验方法 选择全省有代表性的粮棉两兼平原、湖区作为定位试验基点,各点选地势平坦、田块相连、土质一致、能水能旱的耕地作试验 Rice, cotton are the main crops in our province. Because rice and cotton area can not be reduced, and paddy fields and drylands have their own limits, continuous cropping and crop rotation are few, paddy fields and drylands are separated, crop yields are low, and economic benefits are poor. To this end, we conducted a study on the combined effect of paddy and cotton rotation in 1979-1982. Under the premise of not reducing paddy and cotton area, paddy field and dryland rotation are adopted to expand the scope of rice and cotton planting and improve the ecological environment of farmland so as to increase crop yield and economic benefits. First, the test method Select a representative of the province grain and cotton and plains, the lake as a pilot base point, the selection of flat topography, plots connected to the same soil, water drought can be used for testing