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首页> 外文期刊>Weed technology >Johnsongrass (Sorghum halepense) Control as Influenced by Timing of Asulam and Fertilizer/Cultivation Applications
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Johnsongrass (Sorghum halepense) Control as Influenced by Timing of Asulam and Fertilizer/Cultivation Applications

机译：受到草皮草时间和肥料/耕作应用的影响，强生草（高粱halepense）的控制

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Field studies were conducted over 3 yr to evaluate rhizome Johnsongrass control with asulam applied POST at 3.7 kg ai/ha 3 d before fertilization (DBF) or 0,3,7,10, or 14 d after fertilization (DAF). Liquid fertilizer (18-6-12) was applied with injector knives at 0, 112, or 224 kg N/ha 5 cm on each side of a 60-cm line of rhizome Johnsongrass present on 1.8-m-wide conventional sugarcane beds. Johnson-grass response to timing of asulam application after fertilization varied among years but was not affected by fertilizer rate. Johnsongrass control with asulam applied 3 DBF was greater than applications made 0,3, or 7 DAF. With one exception, differences in Johnsongrass control following fertilization and asulam application times were also reflected in the biomass of treated Johnsongrass and its regrowth harvested 6 and 10 wk after asulam application, respectively. Reduced Johnsongrass control associated with asulam application following fertilization was related to stress from root/rhizome injury during fertilizer placement rather than the quantity of fertilizer applied.
机译：在3年中进行了田间研究，以评估在施肥前（DBF）3天或施肥后0、3、7、10或14 d（DAF）3.7公斤ai / ha施用经草木m的POST进行的根茎约翰逊草防治效果。将液体肥料（18-6-12）用喷刀以0、112或224 kg N / ha 5 cm的速度施用到位于1.8米宽的常规甘蔗床上的60厘米根茎庄稼的每侧5厘米处。 Johnson-grass对施肥后的天竺葵施肥时间的响应随年份变化，但不受肥料用量的影响。施加了3 DBF的杜松子草的强生草控制效果大于进行了0.3或7 DAF的施肥。除了一个例外，施肥后的庄稼的生物量和施用杜鹃花的时间不同，这也分别反映在处理过的庄臣草的生物量中，以及在施加杜鹃花后6周和10周收获的再生长。施肥后与施用草皮相关的约翰逊草控制降低与施肥期间根/根茎损伤引起的胁迫有关，而不是施肥量。

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