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自从2,4-D用于麦田除草以来,许多种除草剂已用来消除麦地的阔叶杂草.然而,在小麦的不同生长期使用这些除草剂对小麦的产量和品质的影响仍不十分清楚.1984和1985两年,笔者在怀俄明州多灵顿的Bayard细沙壤土上进行试验,分析在3个不同生长阶段使用10种不同的阔叶杂草除草剂处理对春小麦“Oslo”的影响.结果表明,在Zadoks 44期单独使用麦草畏,麦草畏+2,4-D,麦草畏+MCPA的处理分别使小麦减产28%、21%、24%;每穗实粒数分别降低22%、37%、21%;而小麦籽粒中的蛋白质含量分别增加8%、10%、13%.使用其他几种生长素类除草剂使小麦籽粒的蛋白质含量增加,特别是在Zadoks 44期使用时此效更加明显.在不同阶段使用除草剂都没有对小麦籽粒的脯氨酸和赖氨酸的含量带来影响.无论哪个阶段使用溴苯腈、绿黄隆、MCPA等几种除草剂,春小麦都有很高的耐性.
Many herbicides have been used to eliminate broadleaf weeds in cornfields since 2,4-D was used to weed herbicides However, the use of these herbicides at different growing stages of wheat has not affected the yield and quality of wheat It is clear that in 1984 and 1985, the authors conducted experiments on Bayard fine sandy loam in Dolington, Wyoming, using 10 different broadleaf weed herbicides to treat spring wheat “Oslo” at three different growth stages The results showed that the wheat yield was reduced by 28%, 21% and 24% respectively when treated with dicamba, dicamba and 2,4-D, dicamba and MCPA separately in Zadoks stage 44, 22%, 37% and 21%, respectively, whereas the protein content in wheat grains increased by 8%, 10% and 13%, respectively.While several other auxin herbicides increased the protein content of wheat grains, This effect is more obvious when used.Using herbicides in different stages did not affect the content of proline and lysine in wheat grain.Whether using bromoxynil, Spring wheat has high tolerance.