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Effects of break crops, and of wheat volunteers growing in break crops or in set-aside or conservation covers, all following crops of winter wheat, on the development of take-all (Gaeumannomyces graminisvar.tritici) in succeeding crops of winter wheat
Annals of Applied Biology ( IF 2.2 ) Pub Date : 2014-06-11 , DOI: 10.1111/aab.12139
Jf Jenkyn 1 , Rj Gutteridge 1 , Rp White 1
Affiliation  

Experiments on the Rothamsted and Woburn Experimental Farms studied the effects on take-all of different break crops and of set-aside/conservation covers that interrupted sequences of winter wheat. There was no evidence for different effects on take-all of the break crops per se but the presence of volunteers, in crops of oilseed rape, increased the amounts of take-all in the following wheat. Severity of take-all was closely related to the numbers of volunteers in the preceding break crops and covers, and was affected by the date of their destruction. Early destruction of set-aside/conservation covers was usually effective in preventing damaging take-all in the following wheat except, sometimes, when populations of volunteers were very large. The experiments were not designed to test the effects of sowing dates but different amounts of take-all in the first wheats after breaks or covers apparently affected the severity of take-all in the following (second) wheats only where the latter were relatively late sown. In earlier-sown second wheats, take-all was consistently severe and unrelated to the severity of the disease in the preceding (first) wheats. Results from two very simple experiments suggested that substituting set-aside/conservation covers for winter wheat, for 1 year only, did not seriously interfere with the development of take-all disease or with the development or maintenance of take-all decline (TAD). With further research, it might be possible for growers wishing to exploit TAD to incorporate set-aside/conservation covers into their cropping strategies, and especially to avoid the worst effects of the disease on grain yield during the early stages of epidemics.

中文翻译:

间断作物,以及生长在间断作物或保留地或保护覆盖物中的小麦自愿者,所有后续的冬小麦作物,对后续冬小麦作物的通吃(Gaeumannomyces graminisvar.tritici)发育的影响

Rothamsted 和 Woburn 实验农场的实验研究了不同中断作物和中断冬小麦序列的预留/保护覆盖物对全收的影响。没有证据表明对断裂作物本身的吸收有不同的影响,但在油菜作物中自愿存在会增加后续小麦中的吸收量。全收的严重程度与前次破坏作物和覆盖物的志愿者数量密切相关,并受其破坏日期的影响。早期破坏预留/保护覆盖物通常可以有效防止后续小麦的破坏性全收,除非有时志愿者人数非常多。试验的目的不是为了测试播种日期的影响,但在断头或覆盖后第一批小麦中不同数量的全收显然影响了后面(第二)小麦的全收严重程度,只有后者播种相对较晚. 在早播的第二个小麦中,通吃一直很严重,并且与前面(第一个)小麦中疾病的严重程度无关。两个非常简单的实验结果表明,仅用 1 年的时间代替冬小麦的预留/保护覆盖物不会严重干扰通吃病的发展或通吃衰退 (TAD) 的发展或维持. 通过进一步的研究,希望利用 TAD 的种植者有可能将预留/保护覆盖物纳入他们的种植策略,
更新日期:2014-06-11
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