【摘要】 采用田间试验方法,在高海拔的攀西地区研究了玉米健壮素和烯效唑对杂交玉米新品种正红311株高和产量的影响,结果表明:小喇叭口期叶面喷施玉米健壮素有显著的降高效应,株高和穗位高分别降低12.1%～24.5%和13.5%～16.0%,但产量也随之降低,降低幅度为6.7%～8.9%;株高和产量之间为二次凸函数关系,植株过高、过低均不利于高产。更多还原

【Abstract】 The effects of maize roborant and uniconazole on plant height and grain yield of hybrid maize Zhenghong311 were investigated through field experiment in high altitude region of Panxi. The results were as follows: Maize roborant applied at small bell-mouth stage had significant effects of reducing plant height of 12.1%~24.5%, and ear height of 13.5%~16.0% respectively. However, the grain yields were decreased along with 6.7%~8.9% at the same time. It was found that the relationship between plant height and grain yield was quadratic protruding function. As a result, the grain yield is the highest while plant height optimum.更多还原