Moisture relationships among conventional and brown-midrib corn hybrids for silage

IF 0.8 Q3 AGRONOMY

Crop, Forage and Turfgrass Management Pub Date : 2024-03-19 DOI:10.1002/cft2.20271

J. H. Cherney, D. J. R. Cherney, M. F. Digman

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Abstract

Much of the corn acreage in New York state is harvested as corn silage and moisture assessment in the field is necessary for predicting harvest timing, but moisture estimation visually is very problematic, particularly for brown-midrib (BMR) hybrids. Our goal was to assess plant moisture relationships between BMR and conventional (CONV) corn hybrids, and to identify metadata that may assist in the prediction of whole plant moisture based on ear moisture estimations. In 2023, 202 corn fields were sampled in central New York from August 18 to September 27. A total of 41 different corn hybrids were sampled, with relative maturity (RM) ranging from 84 to 112 days, and 29% of the fields sampled were planted to BMR hybrids. Five representative plants per field were evaluated for plant height, ear length and width, and ear, stover, and whole plant moisture. Estimation of dry ear:stover ratio would be helpful in estimating whole plant moisture based on ear moisture. Ear length was not related to ear:stover ratio, while plant height and ear width were weakly but significantly correlated with ear:stover ratio. Ear moisture was highly correlated with ear:stover ratio (BMR, r = −0.95; CONV, r = −0.90), and highly correlated with whole plant moisture (BMR, r = 0.97; CONV, r = 0.98). Ear moisture averaged 1 to 2% units lower throughout the sampling season for BMR compared to CONV hybrids, while stover moisture averaged 1 to 2% units higher for BMR compared to CONV hybrids prior to optimum harvest moisture. Whole plant moisture declined about 0.6%units/day and was relatively similar across RM groups.

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用于青贮的常规玉米杂交种和棕色中肋玉米杂交种之间的水分关系

纽约州的大部分玉米耕地都是作为玉米青贮收获的，田间水分评估对于预测收获时机非常必要，但水分目测估算很成问题，尤其是对于褐中肋杂交种（BMR）。我们的目标是评估 BMR 和常规（CONV）玉米杂交种之间的植株水分关系，并确定有助于根据果穗水分估计预测整株水分的元数据。2023 年 8 月 18 日至 9 月 27 日，在纽约中部对 202 块玉米田进行了采样。共采样了 41 种不同的玉米杂交种，相对成熟度 (RM) 从 84 天到 112 天不等，其中 29% 的采样田种植的是 BMR 杂交种。对每块田的五株代表性植株的株高、穗长和穗宽以及穗、秸秆和全株水分进行了评估。根据果穗水分估算干果穗与秸秆的比率有助于估算全株水分。穗长与穗秸比无关，而株高和穗宽与穗秸比有微弱但显著的相关性。果穗水分与果穗秸秆比高度相关（BMR，r = -0.95；CONV，r = -0.90），与全株水分高度相关（BMR，r = 0.97；CONV，r = 0.98）。与 CONV 杂交品种相比，BMR 品种在整个采样季节的穗部水分平均低 1-2% 个单位，而在最佳收割水分之前，BMR 品种的秸秆水分平均比 CONV 杂交品种高 1-2% 个单位。全株水分每天下降约 0.6%单位，各 RM 组之间相对相似。

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来源期刊

Crop, Forage and Turfgrass Management Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

1.30

自引率

16.70%

发文量

期刊介绍： Crop, Forage & Turfgrass Management is a peer-reviewed, international, electronic journal covering all aspects of applied crop, forage and grazinglands, and turfgrass management. The journal serves the professions related to the management of crops, forages and grazinglands, and turfgrass by publishing research, briefs, reviews, perspectives, and diagnostic and management guides that are beneficial to researchers, practitioners, educators, and industry representatives.