摘要
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。
Studies on the growth and development of hybrid wheat with chemical hy
bridizing agents from 1991 to 1994 indicated that CHA hybrid wheat had obvious advantage over
common wheat, including parents , in many aspects, such as the earlier emergence of tillers and its
vigorous development,the well developed root system (more root number,greater root dry weight
as well as the higher proportion of roots in deep soil layer) , the greater grain weight heterosis and
faster grain filling speed. All related above were affected or regulated possibly by such agronomic-
factors as planting date, plant density,irrigation and fertilizer, A new way for high yield cultiva
tion in CHA hybrid wheat was presented and its management strategy as well practical protocol
were developed.
出处
《作物学报》
CAS
CSCD
北大核心
1998年第6期990-996,共7页
Acta Agronomica Sinica
基金
农业部重大攻关项目
河北省自然科学基金资助
关键词
杂种小麦
生长发育
农艺措施
Hybrid wheat
Growth and development
Agronomic factors
