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用三个红皮软粒冬小麦(Triticum aestivum L)品种研究了去穗对干物质分配的影响。田间小区按随机区组裂区试验设计(品种为主区,穗处理为副区)。穗处理为两种,一是不去穗(对照),二是在开花后4天去25％的穗(SR)。从去穗之日起刮生理成熟,每隔七天测一次分蘖各器官(穗、穗梗,茎和蘖)的干物重和非结构性炭水化合物总量(TNC)。同对照相比,SR的籽粒产量下降25％,但处理间粒重无显著差异。在SR处理后的一周或二周后,SR副区中蘖,穗梗和茎杆样本的干重和TNC均比对照高。就几个品种平均而言,在整个灌浆期间,对照样本中的净干重增加了1.5g。相比之下,SR副区中的无穗蘖在开花至成熟期间,干物质损失了1.89g。这些发现说明,由无穗蘖生产的干物质并未向同株去穗蘖大量运送以致影响产量。
The effects of spike heading on dry matter distribution were studied using three varieties of Triticum aestivum L. Field plot split zone experimental design by random block (variety as the main area, spike treatment as a sub-area). Spike treatments were two types, one without spike (control) and the other with 25% spike (SR) 4 days after flowering. Physiologically mature from the date of heading, the dry weight and non-structural total carbohydrate (TNC) of each tillering organ (ear, ear stem, stem and tiller) were measured every seven days. Compared with the control, SR reduced the grain yield by 25%, but there was no significant difference in grain weight between treatments. One week or two weeks after SR treatment, the dry weight and TNC of tillers, ear stems and stem samples in the SR subzone were higher than those of the control. On average for several varieties, the net dry weight in the control sample increased by 1.5 g during the entire filling period. In contrast, spike-free tillers in SR sub-zones lost 1.89 g of dry matter during flowering to maturity. These findings indicate that dry matter produced from panicle-free tillers does not have large amounts of transplanted tillers to affect yield.