合理密植是提高小麦单产的重要措施之一。但在我区,近年来小麦密度有逐年过度增大的趋势,中后期倒伏与高产的矛盾日益突出。为解决此问题,我们引进并于1990、1991年分别进行了多效唑对小麦的防倒增产室内及田间试验。一、处理与方法1.多效唑对小麦矮化作用钵裁试验试验于1990年5月进行,选用当地主栽的甘春11号小麦品种,采用营养钵育苗,每钵定留50株,小麦三叶期处理。设15％多效唑(上海联合化工厂)200克/亩、丰产灵(青岛浮山化工厂)200毫升/亩、50％矮壮素(兰大生物系)200毫升/亩和对照(CK)四个处理,三次重复。多效唑采用混 Reasonable and close planting is one of the important measures to improve wheat yield. However, in our district, the density of wheat has over-increased in recent years. The contradiction between lodging and high-yielding has become increasingly prominent in the mid-late period. To solve this problem, we introduced and in 1990, 1991 were paclobutrazol wheat on the anti-down and increase production indoor and field trials. First, the treatment and methods 1 paclobutrazol wheat dwarfing experiments Bowel cut test in May 1990, the selection of the local host Gan Chun 11 wheat varieties, the use of nutrition Bowl nursery, leaving 50 per pot, wheat three Leaf treatment. A total of 200 g / acre of PP334 (Shanghai United Chemical Plant), 200 ml / acre of Feng Shui Ling (Qingdao Fushan Chemical Plant), 200 ml / acre of 50% CK / L and a CK Processing, repeated three times. Paclobutrazol mixed use