摘要
小麦三叶期和抽穗期使用2.4-D试验表明,三叶期喷施2.4-D(0.09mL/m2),对麦田杂草有较好的除草效果,同时对小麦的产量和品质有一定的不利影响。两年的平均结果,千粒重下降6.36%,产量降低1.37%。品质性状中,容重下降2.41%,蛋白质和湿面筋含量与对照相比变化不大,但沉降值变化明显。磷酸二氢钾与其混合喷施,可改善2.4-D单施时对产量和品质性状的不利影响,产量、蛋白质和湿面筋含量,分别提高1.17%、1.2%和1.7%,沉降值也比单施2.4-D有所提高。因此,在小麦三叶期喷施2.4-D时配合磷酸二氢钾对小麦产量和品质性状具有一定的改善作用。抽穗期叶面喷洒低浓度的2.4-D,小麦的千粒重、产量都有提高,蛋白质、湿面筋含量有一定增加,其幅度分别为0.6%、1.7%,而沉降值下降1.7%。甲醇作为一种助剂单独喷施时对小麦的产量性状和品质性状影响不明显,当与2.4-D结合进行叶面喷施时,产量可增加1.36%,最高为1.9%。在品质性状中,蛋白质、湿面筋以及沉降值都有不同程度的增加。
Spraying 2.4-D (0.09mL/m2) at 3-leaf stage of wheat has the effect of weed control in wheat field, while it affects yield and quality adversely, the 1000-kernel weight and yield dropped by 6.36% and 1.37%, respectively, on the average of two years' data. Among the quality characters, test weight lecveased by 2.41% and sedimentation value dropped by 6.2mL while protein and wet gluten content had no obvious change, compared with check. Spraying the mixture of 2.4-D and potassium di-hydrogen phosphate can improve the adverse effect of 2.4-D on wheat yield and quality. Yield, protein and wet gluten content can be raised by 1.17%, 1.2% and 1.7%, respectively, while sedimentation value is also improved. Therefore spraying 2.4-D combined with potassium di-hydrogen phosphate at 3-leaf stage of wheat take the effect of improving the yield and quality. Spraying 2.4-D at heading stage increased 1000-kernel weight and yield, protein and wet gluten content raised by 0.6% and 1.7%, while sedimentation value dropped by 1.7%. As a co-agent, methyl alcohol can not affect wheat yield and quality obviously when it is sprayed singly. However, it can increase yield by 1.36%～1.9% when it is used with 2.4-D together for foliage spraying, while quality characters including protein, wet gluten content and sedimentation value were improved within various extent. Therefore, we support that methyl alcohol could be mixed with 2.4-D for foliage spraying at heading stage.
出处
《黑龙江农业科学》
2003年第3期7-10,共4页
Heilongjiang Agricultural Sciences
