安徽宿县专区的棉区大多是盐碱土,土壤比较瘠薄,肥力低,同时由于棉花面积比较集中,加以肥源不多,在播种季节往往出现缺肥和粮棉争肥的矛盾。致使长期以来棉花产量不易很快提高。为了解决棉田肥料不足,粮、棉争肥的矛盾,我们从1963年秋天开始至1964年,在碭山、萧县等棉区进行了棉田套种苕子的示范工作,取得了一定的成效。 一 棉田套种苕子的增产效果 棉田套种苕子的实验是在碭山、萧县的5个社队和碭山县农科所进行的。它代表了棉区沙土、青沙土和盐碱土的土壤类型以及高、中、低等三个不同的土壤肥力情况。示范点于1963年9月上中旬 The cotton area in Suxian County, Anhui Province is mostly saline-alkali soil with relatively infertile soil and low fertility. At the same time, due to the relatively concentrated area of ​​cotton, few fertilizers are available, and the contradiction between lack of fertilizers and grain and cotton for fertilization often appears during the sowing season. Resulting in long-term cotton yield is not easy to improve quickly. In order to solve the contradiction between lack of fertilizers and competition for grain and cotton in cotton fields, from the fall of 1963 to 1964, we carried out the demonstrations of intercropping prickly heat seeds in cotton fields in Dangshan and Xiaoxian and achieved some success. One cotton field intercropping prickly heat production effect Cotton intercropping prickly heat experiment is in the mountain, Xiaoxian five communes and Dangshan County Agricultural Sciences carried out. It represents the soil types of sandy soil, sandy soil and saline-alkali soil in cotton area, and three different soil fertility conditions of high, medium and low. Demonstration point in mid-1963 September