宽幅带播对大穗型冬小麦冠层特征及产量的影响

为了解宽幅带播在小麦种植上的应用效果,在大田条件下,以兰考矮早八为材料,研究了宽幅带播种植对大穗型冬小麦冠层特征及产量的影响.结果表明,与常规条播比较,宽幅带播的小麦群体叶面积指数、冠层光截获量和相对湿度较高,而冠层温度较低,穗数显著增加,产量提高0.47％～13.70％.宽幅带播下随着行距增大,叶面积指数、光截获量和湿度降低,而冠层温度升高,穗数和穗粒数减少,千粒重增加,最终产量降低.宽幅带播下15 cm行距可作为大穗型冬小麦品种的适宜行距配置.

Effects of Wide Belt Planting on Canopy Characteristics and Yield Winter Wheat with Large spike

Row spacing is a cultivation technique to gain high yield in winter wheat. The objective of this study was to investigate the effects of wide row belt spacing on canopy characteristics and yield of large spike winter wheat under planting patterns of wide belt planting with 8 cm strip width and conventional planting with 2cm strip width. The field experiment was conducted with large spike winter wheat cultivar 'Lankao Aizao 8' with three row spacing of 15, 20 and 25 cm for wide belt planting and 20 cm row spacing for conventional planting in the growing seasons of 2011-2012. Time course measurements were taken on canopy leaf area index, light interception and canopy temperature, relative humidity and yield during the experimental periods. The results showed that compared with conventional planting, leaf area index, light interception and relative humidity for wide belt planting is higher, while the canopy temperature is lower, subsequently the spikes numbers per unit area increased by 2.1%~8.2% and yield increased by 0.5%~13.7%. Leaf area index, light interception and relative humidity decreased, while canopy temperature increased with the increase of row spacing under wide belt planting. Spike number per unit area and grain number per spike decreased, grain weight increased with the increase of row spacing, finally leaded to yield decrease. It suggested that 15 cm row spacing under wide belt planting could be feasible and promising planting patterns for large spike winter wheat.