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Dragging a manure hose over corn at early growth stages does not reduce yield
Agronomy Journal ( IF 2.0 ) Pub Date : 2021-07-04 , DOI: 10.1002/agj2.20797
Melissa L. Wilson 1 , Christopher J. Pfarr 1 , Fabián G. Fernández 1 , Jeffrey A. Coulter 2
Affiliation  

Sidedressing corn (Zea mays L.) with liquid manure slurry via a manure hose application system was recently shown to be a viable practice to apply manure to a growing crop. However, little is known about what growth stage different corn hybrids can be dragged with a manure hose before plant population and grain yield is affected. A small-plot field study was conducted in 2019 and 2020 at both Saint Paul and Waseca in Minnesota to evaluate the effect of dragging a manure hose over corn on plant population, grain yield, and grain moisture of two hybrids with different mid-season brittle stalk ratings (Pioneer P0339R and P0306AM). Plots were dragged in both directions along the row with a manure hose from the first through sixth leaf collar growth stages (vegetative [V] growth stage V1 through V6) and compared to a non-dragged control. Plant population, grain yield, and grain moisture were generally not significantly affected by dragging corn between the V1 and V3 (third leaf collar) growth stages. Dragging at V4 reduced plant population and yield by 41% in 1 of 4 site-years, while dragging after V5 significantly reduced yield by 21–79% and in most cases, increased grain moisture. Yield did not differ between hybrids in any site-year except in Waseca 2019 when a July windstorm disproportionately affected hybrid P0306AM more than P0339R. These results suggest that when using a manure drag hose application system to sidedress corn, sidedressing should be completed before V4 to avoid damaging the crop, regardless of hybrid.

中文翻译:

在早期生长阶段将粪便软管拖过玉米并不会降低产量

侧敷玉米(Zea maysL.) 通过粪便软管施用系统使用液体粪便浆液最近被证明是一种可行的做法,可将粪便施用于生长中的作物。然而,在植物种群和谷物产量受到影响之前,人们对不同的玉米杂交品种可以用粪管拖到哪个生长阶段知之甚少。2019 年和 2020 年在明尼苏达州的圣保罗和瓦塞卡进行了一项小块田间研究,以评估在玉米上拖粪管对两种具有不同中期脆性的杂交种的植物种群、谷物产量和谷物水分的影响。茎等级(先锋 P0339R 和 P0306AM)。从第一个叶领生长阶段到第六个叶领生长阶段(营养 [V] 生长阶段 V1 到 V6),沿着行向两个方向拖动地块,并与未拖动的对照进行比较。植物种群、粮食产量、在 V1 和 V3(第三叶领)生长阶段之间拖动玉米一般不会显着影响谷物水分。在 4 个地点年中的 1 年中,在 V4 处拖地使植物种群和产量减少了 41%,而在 V5 之后拖地则显着降低了 21-79% 的产量,并且在大多数情况下,增加了谷物水分。除了 Waseca 2019 年 7 月风暴对混合动力 P0306AM 的影响大于 P0339R 外,任何地点年份的混合动力之间的产量都没有差异。这些结果表明,当使用粪便拖管施用系统对玉米进行侧施时,无论是哪种杂交种,都应在 V4 之前完成侧施以避免损坏作物。在 4 个地点年中的 1 年中,在 V4 处拖地使植物种群和产量减少了 41%,而在 V5 之后拖地则显着降低了 21-79% 的产量,并且在大多数情况下,增加了谷物水分。除了 Waseca 2019 年 7 月风暴对混合动力 P0306AM 的影响大于 P0339R 外,任何地点年份的混合动力之间的产量都没有差异。这些结果表明,当使用粪便拖管施用系统对玉米进行侧施时,无论是哪种杂交种,都应在 V4 之前完成侧施以避免损坏作物。在 4 个地点年中的 1 年中,在 V4 处拖地使植物种群和产量减少了 41%,而在 V5 之后拖地则显着降低了 21-79% 的产量,并且在大多数情况下,增加了谷物水分。除了 Waseca 2019 年 7 月风暴对混合动力 P0306AM 的影响大于 P0339R 外,任何地点年份的混合动力之间的产量都没有差异。这些结果表明,当使用粪便拖管施用系统对玉米进行侧施时,无论是哪种杂交种,都应在 V4 之前完成侧施以避免损坏作物。
更新日期:2021-07-04
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