| Titles |
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English :
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Evaluation of different kinds of silage supplemented with limestone
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Arabic :
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تقييم الأنواع المختلفة من السيلاج المدعم بمسحوق الحجر الجيرى
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| Abstract |
Four fresh cereal crops included, whole plant corn, corn stover, fodder corn (Darawa) and fodder sorghum were used to evaluate the effect of limestone supplementation during silage making on chemical composition, fermentation characteristics and in situ disappearance of dry matter, crude protein and crude fiber. Forage crops were chopped using harvester chopper machine to 1.5-2 cm length. Ground limestone was added to the different crops at the levels of 0.0, 0.5, 1.0, 1.5 and 2.0% of wet weight and then ensiled in plastic bucket with about 2 kg of weight capacity. After two months, the silos were opened, color and odor were examined and representative samples were taken for chemical analysis as well as to determine the silage quality. The rate of ruminal degradation of DM, CP and CF for the different kinds of silage was determined by using Friesian cows fitted with rumen cannulate. Results indicated that fresh corn stover had the highest (P<0.05) DM and CF contents, while it had the lowest contents of CP and EE. While, fresh fodder corn had significantly (P<0.05) the highest contents of OM and CP and the lowest ash content. Fresh whole corn plant recorded significantly (P<0.05) the highest contents of EE and NFE. While, fresh sorghum forage showed significantly (P<0.05) the highest ash content, the lowest DM and OM contents. The DM, EE, CF and ash contents of different silages significantly (P<0.05) increased with increasing the limestone level, while OM and NFE contents significantly (P<0.05) decreased. The concentration of lactic acid decreased with increasing DM content of silage (r = -0.76). Moreover, it significantly (P<0.05) increased with increasing the limestone level up to 1% and decreased afterwards. There was a negative correlation exist between DM content and VFA's concentration of silage (r = -0.75). On the other hand, the concentration of NH3-N decreased with increasing DM content (r = -0.81), but it increased with increasing CP content (r = 0.75). DM disappearance for different silages significantly (P<0.05) increased with increasing limestone level up to 1% and decreased afterwards. The results also showed a positive correlation (r = 0.71) between DM disappearance and NFE content, while there was a high negative correlation (r = -0.81) between DM disappearance and CF content. The CP disappearance for different silages significantly (P<0.05) decreased with increasing limestone level. While, the undegradable fraction (u) increased and effective degradability decreased, this consequently significantly increases the amount of protein escaping ruminal degradation. The CF disappearance of the different silages increased with increasing CF content, a high positive correlation was recorded between CF content and disappearance (r = -0.97). However, it decreased with increasing NFE content, which there was a high negative correlation (r = -0.87). The results also, indicated that the addition of limestone at the level of 1% of wet weight as silage making improved silage quality, decreased ensiling losses and enhanced DM, CP and CF disappearance.
Keywords: corn silage, limestone, ensiling losses, silage quality, in situ disappearance.
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| Publication year |
2007
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| Pages |
16-37
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| City |
كفر الشيخ
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| serial title |
Journal Agricultural Research Kafr El-Sheikh University
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| Author(s) from ARC |
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| External authors (outside ARC) |
نبيل محمد عويضة
جامعة كفر الشيخ
محمد سعيد صالح
جامعة كفر الشيخ
السيد عبد الرؤف
جامعة كفر الشيخ
وجدى حجاج
جامعة كفر الشيخ
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Chemical composition.
Fermentation.
Limestone.
Silage.
Silage making.
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| Proposed Agrovoc |
silage quality;in situ disappearance;
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| Publication Type |
Journal
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