The effect of wheat straw substitution by different levels of date palm leaves on performance and health of Baluchi ewe lamb

پژوهشهای علوم دامی ایران

Article 2, Volume 7, Issue 4 - Serial Number 24, December 2015, Pages 406-412   

Document Type: Ruminant Nutrition

DOI: 10.22067/ijasr.v7i4.51515

Authors

Reza Valizadeh^{* 1}; Amin Salahi²; mahdi mahmoodi abyane³; Mahmood Salemi⁴

¹Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

²Ferdwosi University of Mashhad

³Department of Animal Science, Boali Sina University, Hamedan, Hamedan, Iran

⁴Ferdowsi University of Mashhad

Abstract

Introduction A major constraint of animal production in south of Iran is the lack of cheap source of roughages. Date palm leaves (DPL) is one of the most abundant agricultural by-products in south of Iran. Almost all pruned leaves are discarded in the fields, mainly for nutrients recycling and soil conservation (M. Wan Zahari, et al1999). The yearly maintenance of date palm tree produces a (around 20 kg per each tree) considerable quantities of green leaves (Bahman et al (1997); Pascual et al (2000)). Ruminant can utilize crop residues, with poor nutritional value. These residues are traditionally fed to animal as the main part of diet in many developing countries. However; dry matter intake of these by-products are not adequate to fulfill the nutrient requirements of livestock even at maintenance level (Dixon and Egan, 2002). DPL has a great potential for use as a roughage or bulk source in total mixed ration (TMR) for ruminants in dry areas. Detailed studies on fermentation characteristics and palatability of DPL silage, as well as on animal performance, have been reported by many workers (e.g. Abu Hassan and Ishida, 1991; Ishida and Abu Hassan, 1997; Oshio et al., 1999). Some researchers such as El-din and Tag-El-Din, 1996; and Bahman et al., 1997 have reported that DPL cannot be fed to animals because of low crude protein (6-7%) and high level of fibrous cell wall content low palatability and digestibility. Therefore we design one experiment that investigates possibility of using DPL without any enrichment. The objective of this trial was to study the effect of replacement DPL with wheat straw and voluntary intake, average body gain and health of Baluchi ewe lambs.
Materials and Methods Twenty-four Iranian Baluchi female lambs with initial body weight (BW) of 20.48±0.5 kg and age of 130±10 days were assigned to 4 dietary treatments in a completely randomized design. Groups were balanced for weight and experimental trail lasted for 76 days. All lambs were given a TMR composed of 39% forage (alfalfa and wheat straw or DPL) and 61% concentrate. The concentrate portion (61%) was the same for all treatments, therefore the dietary treatments differed only in forage part of diet(39%) and they were 1) wheat straw (24%), 2) wheat straw (16%), DPL (8%), 3) wheat straw (8%), DPL (16%), 4) DPL (24%). The diets were fed in form of ad libitum and total mixed ration (TMR). DPL were collected in fall season (time of pruning), dried under the sun light and stored and a dry clean shed up to starting the feeding trial. DPL were chopped in particle size of 3-5cm before mixing. Approximately all diets were isocaloric and isonitrogenos. Diets were offered to the lambs twice daily in almost equal meals at 8 am and 4 pm to meet their feed requirement and fresh water was also available for sheep at all times during the trail.
Results and Discussion Feeding of DPL to Baluchi sheep did not affect their health. Such results have been reported elsewhere by other workers (Osman Mahgoub, et al., 2005). Lambs fed by diet 4 had higher fibrinogen content in their blood samples than other animals in other treatments. The highest feed intake (1033 g/day) was observed in diet 4 containing 24% of DPL. In contrast the animal fed by diet 1 (24% wheat straw) had the lowest feed intake (856 g/day) among all treatments. Average body weight gain of lambs fed by diet 1 was significantly (P

Keywords

Baluchi lambs; Date palm leaves; Growth performance; Wheat straw

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