论文部分内容阅读
选用同一配方饲料 ,粉碎至三种对数几何平均粒度 (177,189,2 2 9μm) ,并经调质制成颗粒饲料 ,对鲤鱼鱼种进行饲喂试验。结果表明 ,三种粉碎粒度的颗粒饲料的水中散失率分别为 13 .5 4% ,15 .12 % ,16 .74% ;在相同环境条件下 ,饲喂三种粒度饲料的鱼体增重率分别为 2 4.7% (177μm) ,14.9% (189μm) ,8.9% (2 2 9μm)。粒度为 177μm的饲料的粗蛋白消化率较 189μm的饲料提高 4.2 6 % (P <0 .0 5 ) ,较 2 2 9μm的提高 14.6 8% (P <0 .0 1) ;同时 ,粒度为177μm的饲料的干物质消化率较粒度为 189μm的饲料提高 3 .6 3 % (P <0 .0 5 ) ,较 2 2 9μm的饲料提高 10 .86 % (P <0 .0 1) ;粒度为 177μm的饲料的消化能较粒度为 189μm的饲料提高 12 .78% (P <0 .0 5 ) ,较 2 2 9μm的饲料提高2 6 .5 8% (P <0 .0 1) ;综合实验结果 ,粒度 177μm为三种试验鲤鱼鱼种饲料的最佳粉碎粒度
The same formula feed was chosen and pulverized to three geometric mean particle sizes (177, 189, 22 9 μm). The carp fingerlings were fed with the conditioned diet to produce pelleted feed. The results showed that the water loss rates of the three kinds of granular feed were 13.54%, 15.12% and 16.74% respectively. Under the same environmental conditions, the weight gain of the three kinds of feed They were 4.7% (177μm), 14.9% (189μm) and 8.9% (22 9μm), respectively. Crude protein digestibility of feed with grain size of 177μm was 4.2 6% (P <0.05) higher than that of 189μm, increased 14.68% (P <0.01) than that of 2 9μm with grain size of 177μm (P <0.05), which was 10.86% (P <0.01) higher than that of 2 2 9μm feed (P <0.01). Compared with the control, the dry matter digestibility of feed with grain size of 189μm increased by 3.63% The digestibility of 177μm diet was 12.78% (P <0.05) higher than that of 189μm particle size diet, but was 26.58% (P <0.01) higher than that of 2 29μm diet. The comprehensive experiment As a result, a particle size of 177 μm was the optimum particle size for the feed of three carp fingerlings