花生副产物在畜牧生产中的综合利用

花生在生产过程中产生大量副产物,其营养价值较高,是重要的饲料加工原料。文章主要针对花生生产过程中副产物营养价值及在畜牧生产中的利用进行综述。     

日本农副产品加工产业分析及对于我国的启示姜丽 渭南师范学院 陕西渭南714099

本文以日本农副产品加工产品的发展历程为切入点,利用SWOT分析法对日本农副产品加工产业的优势与劣势、机遇与挑战进行了较为深入的分析,并最终根据分析结构提出了部分我国相关产业发展的启迪。      

向日葵副产物的营养特性及在反刍动物中的应用

饲料资源缺乏一直以来都是制约中国畜牧业发展的主要因素。从长远看，常规饲料已不能维持中国畜牧业的可持续发展，开发新的饲料资源是解决饲料不足的重要途径之一。向日葵副产物营养价值较高、来源广、价格低，是一种非常具有开发价值的新型饲料。向日葵副产物包括向日葵饼粕、向日葵盘、向日葵秸秆及葵花籽壳：向日葵饼粕蛋白质含量高、纤维含量低，是一种优质的植物蛋白来源，可以提高奶牛乳汁的营养价值、促进肉牛生长、提高羊的瘤胃发酵效果；向日葵盘粗脂肪含量高，含有大量的膳食纤维，可以提高奶牛的产奶量和乳脂率，促进肉牛增重，提高羊瘤胃挥发性脂肪酸浓度以及粗蛋白质、粗纤维、中性洗涤纤维的消化率；向日葵秸秆富含氮、磷、钾、钙、镁等矿物质元素以及少量的蛋白质，可以为肉牛提供一些常量元素和微量元素，提高羊的日增重，降低料重比；葵花籽壳的主要成分是纤维素和木质素，含有丰富的生物活性物质，可以提高奶牛日增重、肉牛饲料转化率。作者具体介绍了向日葵副产物饼粕、葵盘、秸秆、葵花籽壳的营养价值，以及目前它们在反刍动物饲料中的应用情况，以期为今后向日葵副产物的开发利用提供理论依据。     

Production,chemical composition,and fatty acid profile of milk from buffaloes fed with cupuaçu (Theobroma grandiflorum) cake and murumuru (Astrocaryum murumuru) cake in the Eastern Amazon

The objective was to evaluate the effect of concentrate supplementation using by-products of the Amazonian industry on milk production, milk composition, and milk fatty acid profile of dairy buffaloes. Twelve lactating buffaloes (544.5 ± 35.6 kg, 6.4 ± 2.2 years old, 59 ± 6 days in milk) were allotted in a pasture of Mombaça grass and managed under rotational grazing (4 days occupancy/28 days rest). A 3 × 3 Latin square was adopted, and each animal alternately received three supplementary treatments based on corn bran + soybean meal or cupuaçu cake or murumuru cake for 21 days per treatment. Murumuru cake increased the levels of lauric acid and myristic acid in the milk (p < 0.05). Murumuru cake reduced the unsaturated fatty acid contents in the milk compared with animals fed control diet or cupuaçu cake (24.27% vs. 25.24% vs. 25.08%). The n-6/n-3 ratio was 2.6, 1.97, and 2.0 in the control, cupuaçu, and murumuru groups, respectively. Based on this parameter, cakes made from cupuaçu as well as murumuru could be considered to be adequate for inclusion in dairy water buffalo feed. However, the murumuru cake addition requires some caution because its use induces the secretion of higher levels of lauric and myristic fatty acids that are related to human cardiovascular disease.     

Chemical composition and in sacco dry matter degradability of residue and by-products of palm fruit processing in the rumen of steers

The nutritive value of residue (palm calyx leaves (PCL)) and by-products (palm press fiber (PPF) and palm oil sludge (POS)) of palm fruit processing were studied through analysis of their chemical components and degradability of their dry matter (DM) in the rumen of steers. Chemical analysis showed that the materials have similar organic matter components (mean = 95.2%), while crude protein (CP, g/100 g) and metabolisable energy (ME, MJ/kg DM) were highest in POS (10.02 and 9.43), followed by PPF (7.02 and 8.61) and least in PCL (5.42 and 8.04). An opposite trend of CP and ME was noticed in NDF and ADF contents, being 61.53 and 49.11% in PCL, 44.84 and 32.08% in PPF and 25.35 and 20.29% in POS. Mineral contents showed that PPF and POS had the lowest and highest concentration, respectively, of Mg (0.07 vs. 0.11%), Cu (58.5 vs. 143.9 mg/kg) and Fe (1374.5 vs. 4086.0 mg/kg). Dry matter degradation characteristics and effective degradability varied significantly ( P  < 0.05) and were consistently highest in POS and least in PCL. Results have generally shown that the residue and by-products could be ranked for their potential feeding value as POS > PPF > PCL. It is concluded that POS and PPF can be harnessed directly as feed resources for ruminant animals, while PCL will require some treatments to enhance its nutritive value in ruminants.     

Apparent digestibility coefficients of nutrients in brewer's and rendered animal by-products for rainbow trout (Oncorhynchus mykiss (Walbaum))

Two experiments were conducted to measure the apparent digestibility coefficients (ADCs) of nutrients, dry matter, and energy in by‐products of the brewing industry and in selected animal protein ingredients for rainbow trout. In experiment 1, 500 rainbow trout (average body weight 170.8±5.5 g) were stocked in ten 140‐L digestibility tanks with 50 fish per tank and two tanks per diet. Yttrium oxide was used as an inert marker in the diets. The high fibre content of brewer's dried grains (BDG) affected the ADCs of dry matter but not of protein or amino acids. Brewer's dried yeast had a higher protein content than BDG, but ADC values for protein and amino acids were significantly lower. The ADCs of phosphorus were similar among brewer's dried products. The BDG high‐protein, fraction had marginally higher ADC values for dry matter, protein and amino acids than regular BDG. Conditions in experiment 2 were similar to those in experiment 1. ADC values for spray‐dried porcine plasma were over 98% for dry matter, crude protein, crude fat, and gross energy. ADC values for spent hen meal were higher than those of poultry by‐product meal or feather meal, with the exception of gross energy. However, spent hen meal was unpalatable. The ADCs in these ingredients were variable, and this variability must be taken into account when these ingredients are formulated into feeds for fish.     

Influence of the proportion of poultry slaughter by-products and of untreated or hydrothermically treated legume seeds in diets for rainbow trout, Oncorhynchus mykiss (Walbaum), on apparent digestibilities of their energy and organic compounds

Apparent digestibilities (D) of energy and proximate nutrients were determined in rainbow trout, Oncorhynchus mykiss (Walbaum), by stripping faeces and using Cr₂O₃ as a marker. When wheat gluten + L-lysine-HCl (WG-lys) as sole source of dietary N were increased stepwise from 324 to 941 g·kg^?1, replacing 210 g·Kg^?1 fish oil (FO) and 407 g·kg^?1 gelatinized corn starch (GCS), D of crude protein rose from 96 to 99% and that of FO was always above 96%. D of GCS was 70% at inclusions up to 210 g·kg^?1, but only 41 at 407 g·kg^?1. Three by-products of poultry slaughtering and three legume seeds replaced WG at levels of 250 and 500 g·kg^?1 in a basal diet of WG-lys, minerals and vitamins. Soy beans had been pressure cooked at one of two intensities, and field beans and fields peas were either untreated or had been autoclaved. D of energy and crude protein was hardly affected by dietary proportion in poultry blood mean (84 and 85%), poultry offal meal (80 and 81%) and incompletely pressure cooked soy beans (82 and 90%); increasing dietary proportions from 250 to 500 g·kg^?1 reduced the respective values of feather meal (88–81 and 86–83%), raw (43–32 and 76–70%) and autoclaved field beans (67–57 and 89–86%), as well as raw (47–39 and 86–83%) and autoclaved field peas (65–40 and 91–86%). At the higher proportion, D of energy of completely pressure cooked soy beans was reduced from 91 to 86%, but that of crude protein was constant at 94%.     

Evaluation of fisheries by-catch and by-product meals in diets for red drum Sciaenops ocellatus L.

This study evaluated various by‐catch and by‐product meals of marine origin with red drum (Sciaenops ocellatus L.). Four different kinds of by‐catch or by‐product meals [shrimp by‐catch meal from shrimp trawling, Pacific white shrimp (Litopenaeus vannamei (Boone)) processing waste meal, red salmon (Oncorhynchus nerka (Walbaum)) head meal, and Pacific whiting (Merluccius productus (Ayres)) meal] were substituted for Special Select? menhaden fish meal at 33% or 67% of crude protein in diets formulated to contain 40% crude protein, 12% lipid, and 14.6 kJ digestible energy g^?1. Each of these diets and three additional diets consisting of shrimp processing waste meal formulated on a digestible‐protein basis and two Pacific whiting diets containing reduced levels of ash were also evaluated in two 6‐week feeding trials with juvenile red drum (initial weight of 4–5 and 1–2 g fish^?1 in trials 1 and 2). Red drum fed by‐catch meal at either level of substitution performed as well as fish fed the control diet; whereas, fish fed shrimp processing waste meal diets had significantly (P≤0.05) reduced weight gain and feed efficiency ratio values compared with the controls, even when fed on a digestible‐protein basis. The diets containing Pacific whiting at either levels of substitution and regardless of ash level supported similar performance of red drum as those fed the control diet. Fish fed the red salmon head meal diet fared poorly, probably owing to an excessive amount of lipid in the diet that became rancid. Overall, by‐catch meal associated with shrimp trawling and Pacific whiting appear to be suitable protein feedstuffs for red drum.     

Apparent digestibility coefficient of protein and amino acids of acid, biological and enzymatic silage for Nile tilapia (Oreochromis niloticus)

Using the fish silage to partially replace proteic feedstuff in aquafeeds is an alternative to mitigate sanitary and environmental problems caused by the lack of adequate destination for fisheries residues. It would also lower feed costs, consequently improving fish culture profitability. However, using fish silages in aquafeeds depends on determination of its apparent digestibility coefficients (ADC). This work aimed to determining the ADC of crude protein and amino acids of acid silage (AS), biological silage (BS) and enzymatic silage (ES) for juvenile Nile tilapia (94.5 ± 12.7 g). The ADC_CP was: 92.0%, 89.1% and 93.7% for AS, BS and SE respectively. The average ADC of amino acids was: 91.8%, 90.8% and 94.6% for AS, BS and ES respectively. Results encourage the use of AS, BS and ES to partially replace protein sources in balanced diets for neotropical fish.     

新疆籽瓜副产物加工利用研究现状及前景

籽瓜是西瓜的分支品种,丰富的籽瓜资源是制作炒瓜子的主要原料。取籽后的籽瓜瓜皮和瓜瓤中含有大量的氨基酸、维生素和矿物质等营养成分,充分利用籽瓜废弃物有利于提高籽瓜产品的附加值。本文介绍籽瓜的营养成分,综述籽瓜副产物加工利用的研究现状,展望籽瓜及其加工产业的发展前景。