Growth performance of lambs fed mixed diets containing halophyte ingredients
Growth performance of lambs fed mixed diets containing halophyte ingredients
复制标题
DOI：
10.1016/s0377-8401(96)01018-8
复制
发表时间：
1996-12-01
影响因子：
3.2
通讯作者：
Squires, V
中科院分区：
文献类型：
--
作者：
Swingle, RS;Glenn, EP;Squires, V
从断奶到屠宰体重，对饲喂含盐藻成分饲粮的羔羊的生长速度进行了两个试验，每个试验持续84天。以三种盐生植物为饲料，分别为刺蒺藜（Atriplex barclayana）、藜草（Suaeda esteroa）和水杨草（Salicornia bigelovii）秸秆与30%饲粮比例的短爪草（Cynodon dactylon）干草进行比较。盐生植物饲料的矿物质含量远高于草干草（24-34% vs. 5%），试验还比较了10%添加量的盐角草籽粕和棉籽粕。所有饲粮均高精料含量（70%），蛋白质含量为12.5-15%。盐生植物饲粮的干物质采食量高于草控饲粮。由于采食量的增加，盐藻喂养的羔羊的增重速度与对照羔羊相同，但正如预期的那样，饲料效率较低，采水量较高。所有羔羊的胴体品质都很好，不受盐生植物饲料的影响。在一个试验中，在草干草中添加NaCl，试图分离过量盐对采食量和生长的影响。然而，与对照或天然盐生植物饲料相比，模拟盐生植物饲料（Cynodon + NaCl）的增重和摄取率较低，这表明盐生植物饲料中盐的存在形式对动物的可接受性很重要。综上所述，盐生植物在适当的添加水平下可以成为重要的饲料资源，只要这些植物在农艺上是合理的。
The growth rates of lambs fed on diets containing halophyte components were assessed in two trials of 84 days duration each, from weaning to slaughter weight. Three halophyte forages, Atriplex barclayana, Suaeda esteroa and Salicornia bigelovii straw, were compared with Cynodon dactylon hay at 30% of the diet. Halophyte forages were much higher in mineral content than Cynodon hay (24-34% vs. 5%), The trials also compared Salicornia seed meal with cottonseed meal at 10% inclusion. All diets were high in concentrate (70%) and contained 12.5-15% protein. Dry matter intake was higher for lambs fed diets containing halophyte forages than for lambs fed on the grass control diet. Because of the increased intake, halophyte-fed lambs were able to gain at the same rate as the control lambs, but, as expected, feed efficiency was lower and water intake was higher. Carcass merit of all lambs was excellent and was not affected by the inclusion of halophyte forages in the diet. In one trial an additional control treatment was included in which Cynodon hay was supplemented with NaCl to attempt to isolate the effect of excess salt on feed intake and growth. However, the simulated halophyte diet (Cynodon + NaCl) supported lower weight gains and intake rates than the control or natural halophyte diets, showing that the form in which salts are present in halophyte forages is important to their acceptability to animals. It is concluded that halophytes could become important feed resources at moderate inclusion levels wherever production of these plants can be justified agronomically.