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1991～1994年度对杂种小麦叶蘖生长、根系生育、分蘖成穗、幼穗分化、籽粒灌浆、干物质积累分配等的系统深入研究结果表明,CHA杂种有诸多方面的优势;分蘖发生相对较早,且根多蘖壮,与主茎差距小,成穗相对较整齐;初生根生长快,扎得深,次生根条数多且根系粗壮,根干重及深层根比率高,生理活性强;籽粒灌浆快,增期早,强度大,持续时间长,粒重优势突出;播期、密度、供水等农艺措施对根、茎、叶、蘖的生长、干物质积累及灌浆等有明显或一定的调控作用,杂种对肥水条件及其运筹的要求较高,对栽培技术的要求相对较严格。根据研究结果提出了杂种小麦“小密度、中株型、高穗重”的高产栽培新途径及“足底、控前、促中后”的水肥运筹原则,在实践中收到良好效果。
The systematic research on the growth of tiller, root growth, tillering, spike differentiation, grain filling and dry matter accumulation and distribution in hybrid wheat from 1991 to 1994 showed that CHA hybrids had many advantages; the tillering occurred relatively earlier The root growth was more and more deeply rooted, the number of secondary roots was larger and the root system was thick, the root dry weight and deep root ratio were higher, and the physiological activity was stronger. The agronomic measures such as sowing date, planting density, water supply had significant or certain effects on the growth, dry matter accumulation and grain filling of roots, stems, leaves and tillers, etc. The regulatory effect of hybrids on fertilizer and water conditions and the higher requirements of the cultivation of the technical requirements are relatively stringent. According to the results of the study, a new high-yielding cultivation method of “low density, middle plant type and high spike weight” of hybrid wheat and the principle of water and fertilizer for “plantation, pre-control and post-production” were put forward, which received good results in practice.