拔节期补灌对豫中冬小麦籽粒灌浆和产量的影响

Effects of Supplementary Irrigation at Jointing Stage on Gain Filling and Yield of Winter Wheat in Central Henan Province

为研究豫中补灌区冬小麦产量形成的补灌效应,以洛旱6号和豫农202为材料,在大田条件下研究了拔节期灌水对冬小麦籽粒灌浆及产量的影响。结果表明:随灌水量的增加,2个冬小麦品种的叶绿素含量下降速度变慢,叶片衰老延缓。拔节期补灌可延长冬小麦灌浆时间,洛旱6号在少量补灌下有较长的灌浆时间,豫农202在常量补灌下有较长的灌浆时间。补灌处理对2个冬小麦品种的产量和产量性状影响不同。洛旱6号在少量补灌下产量最高(10 450.7 kg/hm2),较对照增产14.98%,其主要是通过穗粒数的增加而实现的;豫农202在常量补灌下产量较高(10 473.2 kg/hm2),较对照增产25.18%,其主要依赖于穗数和穗粒数的增加。两品种相比,豫农202的补灌效应更大。

In order to understand the effects of supplementary irrigation on the winter wheat yield formation in central Henan province,field experiments were carried out using Yunong 202 and Luohan 6 as materials.The results indicated：The chlorophyll relative content and the speed of leaf senescence decreased with the increase of irrigation quantity;Filling stage could be prolonged by supplementary irrigation at jointing stage.Luohan 6 could get longer filling time by small amount of supplementary irrigation,while Yunong 202 could get the same results by normal supplementary irrigation.Supplementary irrigation had different effects on yield and yield characters of winter wheat.Luohan 6 had higher yield at the less cost-effective irrigation,because of the more grains per spike.The production was increased by 14.98%.Yunong 202 in the regular irrigation had higher output,because of the more spike numbers and grains per spike.The production was increased by 25.18%.Compared with Luohan 6,Yunong 202 had the higher yield potential under supplementary irrigation condition.