64 Effect of grass silage chop length when fed alone, or with corn silage, on digestion and metabolism in dairy cows.

Tayyab, U.; Wilkinson, R.G.; Reynolds, Chris; Sinclair, L.A.

doi:10.1093/jas/sky404.864

Cited by 2 publications

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“…That grass is harvested by an SPFH on 63% of the farms surveyed (Figure 1B) implies that most of the grass cut for silage is precision-chopped. Recent research by Tayyab et al (2018Tayyab et al ( , 2019 reporting higher dry matter intake (DMI), higher DMD and higher milk yields in cows offered grass silages with very short chop length. While the use of SLFW can help improve labour and improve fuel use efficiency (Frost & Binnie, 2005), SLFWs were used by only 13% of the farmers.…”

Section: Key Silage-making Practicesmentioning

confidence: 99%

A short survey of key silage-making practices on Northern Ireland dairy farms, and farmer perceptions of factors influencing silage quality

Ferris

Laidlaw

Wylie

2022

Irish Journal of Agricultural and Food Research

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Northern Ireland dairy farmers (n = 174) were surveyed to identify key silage-making practices, and factors perceived to influence the quality of grass silage made on their farms. The majority of farmers (65%) harvested grass for silage three times/year: 62% normally used a contractor, while 47% routinely used a silage additive. Delays to mowing and delays to harvesting due to adverse weather or poor ground conditions were perceived to have a large or very large impact on silage quality (68% and 53% of farmers, respectively). Inadequate wilting, poor-quality swards on owned land, on rented land and “contamination” of first-cut grass with autumn or winter growth herbage were all perceived as having a large or very large impact on silage quality (32%, 27%, 40%, 30% of farmers, respectively). Over the previous decade, 11%, 41% and 37% of farmers claimed a small, moderate or large improvement in silage quality, mainly due to earlier cutting of grass and ensiling better quality swards.

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Section: Key Silage-making Practicesmentioning

confidence: 99%

A short survey of key silage-making practices on Northern Ireland dairy farms, and farmer perceptions of factors influencing silage quality

Ferris

Laidlaw

Wylie

2022

Irish Journal of Agricultural and Food Research

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“…Результаты многочисленных исследований доказывают, что качество корма, изготовленного с помощью кормоуборочного комбайна, зависит от качества измельчения растений [1][2][3][4], упрощенная методика оценки которого предполагает использование сепаратора частиц, содержащего три решета. Современные рекомендации к качеству измельчения трав на сенаж состоят в обеспечении следующих показателей массовой доли частиц: на верхнем решете с круглыми отверстиями диаметром 19 мм -10-20 %, на среднем решете с круглыми отверстиями диаметром 8 мм -45-75 %, на нижнем решете с квадратными отверстиями размером 1,3 мм -10-20 %, под нижним решетом на нижней панели сепарато-ра − менее 5 % 1 .…”

Section: Introductionunclassified

The Method of Calculating Cut Length for Flail and Double Chop Forage Harvesters

Belov

2019

Engineering Technologies and Systems

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Introduction. Many studies show that the chopped feed quality depends on the plants chopping quality. The quality of plant chopping, provided by a forage harvester, is defined by particle length distribution. It is important to find the theoretical basis of grass chopping regimes for making haylage and other kinds of feeds. The purpose of this study is to develop an algorithm and techniques to assess the quality of plant chopping based on mathematical models of chopping with the flail and double chop forage harvesters. Materials and Methods. Mathematical models of a flail type unit and double chop unit were presented and used to develop the algorithms and method of calculating the cut length distribution. Results. The algorithms and computation methods of cut length distribution were presented for a flail type unit and a double chop unit. The effect of the plant height, the height of cut, feed and the average length of cut on the mass fraction of particles within the specified ranges of lengths were investigated. Discussion and Conclusion. A flail forage harvester is not able to harvest the grass crops for making haylage with 45–75 % forage particles, the length of which is in the range from 8 mm to 19 mm. A double chop forage harvester allows harvesting the grass crops for making haylage only when auger angular velocity and/or flywheel or cylinder drum angular velocity is regulated. A double chop device can be used to chop plants for preparation of various forages if auger angular velocity and/or flywheel or cylinder drum’s angular velocity is regulated.

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64 Effect of grass silage chop length when fed alone, or with corn silage, on digestion and metabolism in dairy cows.

Cited by 2 publications

References 0 publications

A short survey of key silage-making practices on Northern Ireland dairy farms, and farmer perceptions of factors influencing silage quality

A short survey of key silage-making practices on Northern Ireland dairy farms, and farmer perceptions of factors influencing silage quality

The Method of Calculating Cut Length for Flail and Double Chop Forage Harvesters

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