摘要
An in vitro dry matter disappearance (IVDMD) study and two 138-day feeding trials were conducted to evaluate wet potato and corn chipping by-products as feeds for beef cattle. In Trial 1, IVDMD was measured for simulated diets containing either potato filter cake (PFC) or corn centrifuge solids (CCS). The basal diet consisted of corn silage and urea (13% total dietary crude protein). Potato and corn by-products separately replaced corn silage in 10 percentage unit increments of dietary dry matter (DM). When CCS replaced corn silage, IVDMD increased 2·07 percentage units for each increment in the dietary by-product level. The corresponding value for PFC was 0·47 percentage units. In Trial 2, yearling heifers (255 kg) fed barley silage based diets containing 7, 15 and 30% mixed potato and corn by-products (DM basis) had similar rates of gain (1·21 to 1·25 kg day−1; P > 0·05). Daily DM intakes (kg) and DM: gain ratios were 8·39, 6·93; 8·52, 7·04; 8·04, 6·43, respectively, for the three diets. In Trial 3, barley silage based diets containing 0, 9 and 18% mixed potato and corn by-products were fed to yearling heifers (246 kg). Average daily gains ranged from 1·13 to 1·18 kg (P > 0·05). Daily DM intakes (kg) and DM: gain ratios were 8·81, 7·78, 9·16; 8·31, 7·35, respectively, for the three diets. The results of these experiments suggest that wet potato and corn chipping by-products may replace up to 30% of dietary DM in beef cattle finishing diets without decreasing animal performance.
摘要译文
进行了体外干物质消失（IVDMD）研究和两次138天喂养试验，以评估湿马铃薯和玉米碎片副产品作为肉牛的饲料。在试验1中，测量含有马铃薯滤饼（PFC）或玉米离心固体（CCS）的模拟饮食的IVDMD。基础日粮由玉米青贮饲料和尿素（13％总膳食粗蛋白）组成。马铃薯和玉米副产品分别以10％单位增量的膳食干物质（DM）替代玉米青贮饲料。当CCS取代玉米青贮饲料时，IVDMD在膳食副产品水平的每个增量中增加了2·07个百分比单位。 PFC的相应值为0.47个百分比单位。在试验2中，一年生小母牛（255公斤）饲喂含有7％，15％和30％混合马铃薯和玉米副产品（基于DM）的大麦青贮饲料具有相似的增重率（1·21至1.55 kg日sup -1 / sup; P 0·05）。每日DM摄入量（kg）和DM：增益比为8·39,6,93; 8·52,7·04;分别为8·04,6·43，用于三种饮食。在试验3中，含有0的大麦青贮饲料，将9％和18％的混合马铃薯和玉米副产品喂给一岁的小母牛（246千克）。平均日增重范围为1.13至1.81千克（P 0.05）。每日DM摄入量（kg）和DM：增益比为8·81，7·78,9·16;分别为8·31,7·35，用于三种饮食。这些实验的结果表明，在不降低动物性能的情况下，湿马铃薯和玉米碎片副产品可以替代肉牛精加工日粮中高达30％的膳食DM。
R.G. Crickenberger. Wet potato and corn chipping by-products as feedstuffs in finishing diets for beef cattle[J]. Agricultural Wastes, 1983,6(4): 221-234