摘要
1982—1987年剪芒、剪叶试验结果表明,大麦诸光合器官对产量的作用表现为:芒>旗叶>倒2叶>倒3叶。芒的作用因品种类型和灌浆期的气候生态条件不同而异,六棱大麦芒的作用大于二棱大麦。在温度较高,光照充足和雨量较少的年份,芒对粒重的贡献较大;反之,在温度较低,光照不足和雨量较多的年份则较小。灌浆期芒上喷尿素加 KH_2PO_4液体肥料能显著提高芒的光合强度,增加千粒重1.3—3.4克。芒对产量贡献卓越的主要原因在于其光合细胞结构复杂,光合面积大和叶绿素含量多。
Awn-cutting and defoliation experiments in barley made from 1982 to 1987 showed that the effect of different photosynthetic organs on grian yield followed the fol- lowing order:awn>flag leaf blade>second leaf blade from the top>third leaf blade from the top.The effect of awn varied with barley types and ecoclimatic conditions during kernel filling stage.It was greater in six-rowed barley than in two-rowed bar- ley.The contribution of awn to grain weight in the years with higher temperature, abundant sunlight and less rainfall is greater than that in the years with lower tempera- ture.insufficient sunlight and more rainfall.At the kernel filling stage.spraying liquid fertilizer of urea mixed with KH_2PO_4 onto awns could improve photosynthetic capacity considerably.with an increase of 1.3-3.4g per 1000 grains.The principal machanism of the excellent contribution of awn to grain yield lies in their complex structure of assimilation cells.larger photosynthetic area and higher content of chlorophyll.
出处
《作物学报》
CAS
CSCD
北大核心
1991年第4期241-247,共7页
Acta Agronomica Sinica