多效唑和“小胖墩”对镇麦12农艺性状及产量的影响

Effects of Spraying Paclobutrazol and‘Xiaopangdun'on Agronomic Traits and Yield of Zhenmai 12

采用小区试验比较法,在小麦2叶至6叶期之间,比较不同剂量多效唑和小胖墩处理下的对比试验。多效唑试验结果表明,不同时期喷施不同浓度的多效唑,都能不同程度的抑制叶龄生长;随着浓度的增加,株高抑制越明显,特别是基部第一节间的长度抑制;适宜浓度(600 g/hm^2)下促进成穗率并提高千粒重。小胖墩试验结果表明,不同时期喷施不同浓度的小胖墩对叶龄、株高等影响不大,主要促进成穗率及千粒重提高并增加产量。

A field experiment was conducted to study the effects of spraying different concentration paclobutrazol and Xiaopangdun on wheat between 2 leaf and 6 leaf stage of wheat.The results showed that spraying different concentrations paclobutrazol at different times could inhibit the growth of leaf age;with the increase on concentration,the inhibition on plant height was more obvious,especially the length of basal internode;the proper concentration of 600g/hm2could promote the increase of percentage of earbearing tiller and 1000-grain weight.However,there was no obvious effect of spraying different concentrations Xiaopangdun at different times on leaf age or plant height,its mainly function was to promote the increase of ear rate,1000-grain weight and yield.