栽培模式和花后去叶对小麦产量及其构成的影响

在黄土高原南部半湿润易旱区以土垫旱耕人为土为供试土壤，进行大田试验，研究了不同栽培模式下花后去叶对产量及其构成的影响。结果表明，不同栽培模式对穗粒数、千粒重和籽粒产量的影响差异显著（P〈0．05），集雨面栽培下穗粒数最多；全程覆膜、覆膜150d和集雨面栽培模式千粒重显著高于常规栽培和三密一稀栽培；全程覆膜栽培下籽粒产量最高。去叶处理对稳粒数、千粒重和籽粒产量影响差异显著（P〈O．05），各去叶处理穗粒数均大于对照。不同去叶处理千粒重均小于不去叶对照。不同去叶处理籽粒产量大小顺序为去全旗叶〉对照〉只保留旗叶〉去1／2旗叶〉去旗叶、倒二叶。去叶处理对穗粒数、千粒重和籽粒产量的影响因栽培模式不同而有差异。

Effect of Removing Leaf after Anthesis and Different Planting Modes on Yield and Its Composition of Winter Wheat

Filed experiments were carried out on the Eum-OrthicAnthrosols in the south semi-humid area of the Loess Plateau.Different treatments of removing leaf were used to study the effect of the different parts of wheat leaf on grain yield after anthesis in different planting models.The results showed that,there were significant differences in the number of qrains,the thousand-grain weight and the grain yield between different planting models(P<0.05),the number of qrains in the harvesting rainfall cultivation was the most;the 1000-grain weight in mulching cultiration of whole growing period and intensive rainfall cultivation and mulching cultivation of 150 days were significantly higher than which in conventional cultivation and the cultivation of planting with different line distances;the grain yield in mulching cultivation of whole growing period was the most.On the other hand,there were significant differences in the number of grains,the 1000-grain weight and grain yield between different treatments of removing leaf(P<0.05),the number of spikes in the treatments of removing leaf were more than which in the treatment of no removing leaf;the weight per thousand spikes in the treatments of removal leaf were less than which in the treatment of no removing leaf.The effect of treatments of removing leaf on grain yield was in the following order: the treatment of removing flag leaf>the CK>the treatment of removing other leaves except flag leaf>the treatment of removing 1/2 flag leaves>the treatment of removing flag leaf and backward second leaf.The effects of removing leaves on the number of spikes,the 1000-grain weight and grain yield were different among different planting modes.