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应用箱栽法以普通型、极蘖空心型及一次分蘖高峰型3种不同分蘖类型的品种为材料,观察了冬小麦根系生长规律。在全生育期内根系生长有冬前和拨节前后两次生长高峰,冬前每昼夜生长1.5～2.5cm,起身至挑旗期每昼夜生长1.4～2.2cm。根系的日生长速度主要受气温的影响。根系的入土深度随小麦的生长进程而逐渐加深。根系干重随植株的生长而增长,抽穗期达最大值。此后,根系开始衰亡,下层根的衰亡速度较慢,上层根的衰亡速度较快。不同分蘖类型品种的穗根比(穗/根)有较大差异,分蘖成穗率低的大穗型品种,其穗根比较小,故其秸秆粗壮,穗大粒多。
The growth pattern of root system of winter wheat was observed by using box planting method with three types of tillers, ie common type, polar tiller hollow type and primary tillering peak type. In the whole growth period root growth before and after the dial before and after the growth of two peaks before the winter every day and night growth of 1.5 ~ 2.5cm, rose to pick the flag period every day and night to grow 1.4 ~ 2.2cm. The root daily growth rate is mainly affected by the temperature. Root penetration depth with wheat growing progressively deepened. Root dry weight increased with the growth of plants, the maximum heading date. Since then, the root system began to decline, the lower root decline more slowly, the upper root decline faster. Different types of tillers had a larger ratio of spike / root (panicle / root). Large panicles with low panicle tillers had smaller spikes and had thick stalks and large spikes.