“精量播种”小麦的基本苗与各产量因子的相关分析

The Correlative Analysis of Yield Factors with Basic Seedling of 'Precision Drilling' Winter Wheat

在高肥条件下用两个品种五个播量进行的“精量播种”试验表明,基本苗、亩穗数、穗粒数、穗粒重之间存在着极显著的相关关系.基本苗过多过少对产量均有不利影响.大穗型品种的适宜基本苗范围比多穗型品种幅度大.在保持现有亩穗数的前提下,加强后期管理,充分挖掘粒数和粒重的增产潜力,是进一步增产的途径.

At the high fertilizer level,two cultivars were used for 'precision drilling' experiment with five kinds of sowing amount. The result showed that the correlative relationship was quite significant among basic seedling, ear numbers per mu , grain numbers per ear and weight of ear grain. The output of winter wheat was badly influenced if basic seedling was more or less. The range of suitable basic seedling for big ear cultivar was wider than that of the cultivar with more ears on the condition of keeping the available ear numbers permu ,the measures of further improving output were to strengthen the mangement of later growth stage 'and exploit the increasing output potentiality of grain numbers and grain weight.