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<p>In order to assess nutritive potential of date and palm tree residues as feed resources for ruminants in Tunisian oasis, sampled biomasses from Deglet Nour and Allig varieties were evaluated for chemical composition, in vitro fermentation and metabolizable energy contents. Results for chemical composition of fruit wastes showed that these substrates are a potential source of sugar (an average of 84.3 g/100 g DM for Deglet Nour dates and 73.4 g/100 g DM for Allig ones), low in fiber (an average of crude cellulose of 3.20% DM for Deglet Nour dates and 2.60% DM for Allig ones) and provided with phenolic compounds (an average of 0.93 g/100 g DM for Deglet Nour dates and 1.01 g/100 g DM for those of Allig). Date fruit wastes presented a relatively high-energy content as evaluated in vitro (ME ~ 2300 kcal/Kg DM). The other tree wastes were low in CP and sugar but high in lignified cell wall, with low ME contents. It was concluded that date and palm tree residues and wastes are not used to enhance the roughage quality. Such alternative is to valorize available resources in difficult conditions when forages are rare and expensive. Except for retired fruits which could enhance rumen fermentation by a rapid supply of energy (sugar) especially when synchronized with supply of rapidly available Nitrogen. However, palms and pedicels are nutritionally poor and may be classified as roughages, close to straws or poor quality hays.</p>

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Evaluation of date palm tree (Phoenix dactylifera L.) residues and wastage as alternative to some conventional feed resources for ruminant in the Southern Tunisia

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Nizar Moujahed,
  • Jihène Hammou,
  • Hajer Guesmi,
  • Khaoula Attia,
  • Hanen Ben Ismail

摘要

In order to assess nutritive potential of date and palm tree residues as feed resources for ruminants in Tunisian oasis, sampled biomasses from Deglet Nour and Allig varieties were evaluated for chemical composition, in vitro fermentation and metabolizable energy contents. Results for chemical composition of fruit wastes showed that these substrates are a potential source of sugar (an average of 84.3 g/100 g DM for Deglet Nour dates and 73.4 g/100 g DM for Allig ones), low in fiber (an average of crude cellulose of 3.20% DM for Deglet Nour dates and 2.60% DM for Allig ones) and provided with phenolic compounds (an average of 0.93 g/100 g DM for Deglet Nour dates and 1.01 g/100 g DM for those of Allig). Date fruit wastes presented a relatively high-energy content as evaluated in vitro (ME ~ 2300 kcal/Kg DM). The other tree wastes were low in CP and sugar but high in lignified cell wall, with low ME contents. It was concluded that date and palm tree residues and wastes are not used to enhance the roughage quality. Such alternative is to valorize available resources in difficult conditions when forages are rare and expensive. Except for retired fruits which could enhance rumen fermentation by a rapid supply of energy (sugar) especially when synchronized with supply of rapidly available Nitrogen. However, palms and pedicels are nutritionally poor and may be classified as roughages, close to straws or poor quality hays.