There are very few published articles about how silage additives affect digestibility of whole crop silage. In this experiment, male lambs were given whole crop barley or wheat silage harvested at dough stage with a number of different acid-based and bacterial additives

Lingvall, P.

Muhonen, S.

Olsson, I.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XX International Grassland Congress Effect of Additives at Harvest on the Digestibility in Lambs of Whole Crop Barley or Wheat Silage S. Muhonen Swedish University of Agricultural Sciences, Sweden I. Olsson Swedish University of Agricultural Sciences, Sweden P. Lingvall Swedish University of Agricultural Sciences, Sweden Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, and the Weed Science Commons This document is available at https://uknowledge.uky.edu/igc/20/satellitesymposium2/60 The XX International Grassland Congress took place in Ireland and the UK in June-July 2005. The main congress took place in Dublin from 26 June to 1 July and was followed by post congress satellite workshops in Aberystwyth, Belfast, Cork, Glasgow and Oxford. The meeting was hosted by the Irish Grassland Association and the British Grassland Society. Proceedings Editor: D. A. McGilloway Publisher: Wageningen Academic Publishers, The Netherlands © Wageningen Academic Publishers, The Netherlands, 2005 The copyright holder has granted the permission for posting the proceedings here. This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. Silage production and utilisation 171Effect of additives at harvest on the digestibility in lambs of whole crop barley or wheat silage S. Muhonen, I. Olsson and P. Lingvall Swedish University of Agricultural Sciences, Department of Animal Nutrition and Management, Kungsängen Research Centre , SE-753 23 Uppsala, Sweden, Email: Sara.Muhonen@huv.slu.se  Keywords: bacterial additives, digestibility, formic acid, whole crop silage  Introduction  There are very few published articles about how silage additives affect digestibility of whole crop silage. In this experiment, male lambs were given whole crop barley or wheat silage harvested at dough stage with a number of different acid-based and bacterial additives.   Materials and methods  Spring varieties of barley (37% dry matter) (DM) or wheat (45% DM) were harvested as whole crop silage at the middle of dough stage (24-27 July 2003). At harvest either no additive (control), acid-based additives (Promyr, Promyx and Kofasil Ultra) or bacterial additives (Lactisil wholecrop and Lactisil NB200), were used. Fifteen male lambs (Swedish finewool) with an average live weight (LW) of 45 kg were used in three subsequent digestibility experiments. The digestibility of each silage was determined on three animals. Each of the three experiments comprised at least one of the control silages. Feed allowances were adjusted according to the LW to meet the requirements for 0.1 kg daily weight gain. Soybean meal was added to cover the protein requirements and constituted 10% of total diet DM. The statistical analyses were performed using the mixed procedure of SAS (SAS, 1999).  Results  The silages used for all treatments were well fermented with low contents of ammonia, butyric acid and ethanol. Control silages and silages treated with acid-based additives had higher pH and lower content of lactic acid than treatments with bacterial additives. All lambs ate the diets with good appetite, but in most cases the allowances were not completely consumed. There were no significant differences in DM, organic matter (OM) and gross energy (GE) digestibility between the two crops. Neutral detergent fibre digestibility was higher (P<0.001) for barley than wheat diets. Crude protein (CP) digestibility was significantly (P<0.05) higher for wheat than barley diets. There were no significant interactions between crops and additives. There were no differences in DM, OM, CP and GE digestibility (Table 1) as an effect of different additives.  Table 1  Dry matter (DM), organic matter (OM), crude protein (CP) and gross energy (GE) digestibility (%) of whole crop silage diets preserved with different additives (means over both crops). Least squares means (LSM), standard error of the mean (SEM) and significance level for pair-wise comparisons between additives using Bonferroni correction. NS – not significant (P>0.05)  Additives   Control Promyr Promyx Kofasil Ultra Lactisil wholecrop Lactisil NB200 Significance level DM LSM 60.9 62.8 62.5 62.6 60.8 63.7 NS  SEM 0.69 1.43 1.43 1.27 1.43 1.43  OM LSM 64.1 65.7 65.4 65.6 63.8 66.9 NS  SEM 0.65 1.36 1.36 1.21 1.36 1.36  CP LSM 70.7 68.8 70.3 68.4 70.0 70.6 NS  SEM 0.78 1.59 1.60 1.45 1.59 1.58  GE LSM 61.1 62.8 62.1 61.7 59.3 62.8 NS  SEM 0.75 1.55 1.55 1.38 1.55 1.55   There were no differences in digestible energy and metabolisable energy contents (MJ/kg DM) between the barley and wheat diets. DM intake (g/kg LW) was higher (P<0.001) for wheat than barley diets, but there were no differences between the different additives.   Conclusions  The present findings do not indicate that the additives used have an important effect on the digestibility of whole crop barley or wheat silage.  Reference SAS (1999). SAS/STAT User’s Guide, version 8. SAS Institute Inc.:Cary, NC, USA. 

Effect of Additives at Harvest on the Digestibility in Lambs of Whole Crop Barley or Wheat Silage

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Effect of Additives at Harvest on the Digestibility in Lambs of Whole Crop Barley or Wheat Silage

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