论文部分内容阅读
武威平川灌区是全国春小麦高产地区之一。栽培技术上存在着播量过大的问题,影响着持续稳定的增产。探讨本区各春小麦品种的适宜密度,对当前春小麦生产具有重要意义。一、材料和方法供试春小麦品种七个,在八个地点进行试验。密度分每亩15、20、25、30、35、40、45、50、55和60万株共十个处理,在每一处理中随机选面积为1×10m~2的三个点共30个点,观察基本苗数,最大分蘖数,有效穗数,产量。每点随机取50～100株进行室内考种。用方程式y=x/(a+bx+cx~2)……公式1描述基本苗和产量变化曲线,求出最适密度和适宜的密度范围;用方程式y=x/(a+bx)……公式2描述基本苗和有效穗数变化曲线,求出成穗率(有效穗数/基本苗数)为1时的基本苗数,用方程式y=1/(a+bx)……公式3描
Wuwei Pingchuan Irrigation District is one of the spring wheat high yield areas. Cultivation technology there is a problem of excessive sowing, affecting sustained and steady increase in yield. It is of great significance to discuss the appropriate density of spring wheat varieties in this area for the current spring wheat production. I. Materials and Methods Seven spring wheat varieties were tested and tested in eight locations. Density of 15,20,25,30,35,40,45,50,55 and 600,000 per acre of a total of ten treatment, in each treatment were randomly selected area of 1 × 10m ~ 2 three points total 30 A point to observe the basic seedling number, the maximum tillering number, the effective panicle number, yield. Take 50-100 plants randomly for indoor test. Using the formula y = x / (a + bx + cx ~ 2) ...... formula 1 describes the basic seedling and yield curve, find the optimal density and suitable density range; with the formula y = x / (a + bx) ... ... Formula 2 describes the basic seedling and effective panicle curve, find the panicle rate (effective panicle / basic seedlings) is the number of basic seedlings 1, with the formula y = 1 / (a + bx) ... Formula 3 Sketch