蚕豆是云南省重要的小春作物,长期以来由于单产偏低,严重影响着农民的经济收益。低产的原因,固然是多方面的,但不少地区却是因为土壤缺少可供吸收钼引起的。钼是高等植物生长发育不可缺少的一种微量元素,据有关研究证明,钼肥不仅能提高氮肥的利用率,加速农作物体内氮磷的转化,而且能提高根瘤菌的活动能力。据田间观察,昆明郊区部分蚕豆在生产期出现缺钼的征兆。为了验证蚕豆的施钼效果,以及钼肥的有效施用条件,我们进行了下述数组试验。一、试材与方法供试的钼肥为仲钼酸铵,供试的蚕豆为 Broad bean is an important small spring crop in Yunnan Province. For a long time, the yield of peasants has been seriously affected by the low yield. The reason for low yield is, of course, multifaceted, but many areas are caused by the lack of available soil for absorption of molybdenum. Molybdenum is an essential trace element for the growth of higher plants. According to relevant research, molybdenum fertilizer can not only improve the utilization of nitrogen fertilizer, accelerate the transformation of nitrogen and phosphorus in crops, but also improve the activity of rhizobia. According to field observations, part of the broad beans in the suburbs of Kunming appear molybdenum in the production of signs. In order to verify the effect of applying molybdenum on beans and the effective application of molybdenum fertilizer, we conducted the following array experiments. First, the test materials and methods for the trial of molybdenum ammonium paramolybdate, for the test of beans