Effect of different protein sources on growth and carcass traits in growing-finishing pigs     

Shelton JL  Hemann MD  Strode RM  Brashear GL  Ellis M  McKeith FK  Bidner TD  Southern LL 《Journal of animal science》2001,79(9):2428-2435

Crossbred gilts (n = 180) and barrows (n = 180) from the Louisiana State University (LSU) Agricultural Center and the University of Illinois (UI) were used to compare the effect of soybean meal in swine diets, relative to other protein sources, on growth performance and carcass traits of growing-finishing pigs. Four replications with five pigs each at each location were allotted to nine dietary treatments: soybean meal control (SBM), crystalline AA (corn-AA), extruded soybeans (ESB), canola meal (CAN), peanut meal (PNT), sunflower meal (SFLR), ground peas, meat and bone meal (MBM), and poultry by-product meal (PLTY). The diets were formulated to meet or exceed NRC nutrient requirements and to have equal Lys:ME according to dietary phase and sex. Corn was the grain source in all diets and the protein sources were the sole source of supplemental protein in all diets except when AA were added to meet the requirement. Pigs (three per pen at each location) were killed at an average final BW of 114 kg in the LSU or UI Meat Science Laboratories. Pigs fed SBM had greater (P < 0.05) ADG than pigs fed the corn-AA, CAN, SFLR, MBM, or PLTY and greater (P < 0.05) ADFI relative to pigs fed the corn-AA, ESB, MBM, or PLTY. Gain:feed was decreased (P < 0.05) in pigs fed corn-AA or SFLR but increased (P < 0.05) in pigs fed ESB compared with pigs fed the SBM diet. Loin muscle area was decreased (P < 0.05) in pigs fed the corn-AA or MBM diets compared with pigs fed the SBM diet. Tenth-rib backfat thickness was greater (P < 0.10) in pigs fed corn-AA, peas, or MBM than in those fed SBM. The NPPC percentage acceptable quality lean and kilograms of lean were decreased (P < 0.10) in pigs fed corn-AA, peas, or MBM compared with those fed SBM. Results from this experiment suggest that pigs fed SBM have equal or better growth performance and carcass traits than pigs fed other protein sources.  相似文献   

朝鲜南部地区农业资源及粮食生产水平分析     

王庆祥 《沈阳农业大学学报》2004,35(3):189-191

朝鲜南部地区的降雨量、日照和热量等农业气候资源相对充足,但60%～70%的土壤偏酸性,土壤肥力差,粮食单产水平很低,而造成当地农业生产水平低下的原因可能是多方面的,需要采取综合措施加以解决。  相似文献   

热激因子基因AtHSFa1a提高烟草的耐热性研究     

万发香  田婷婷  杜小兵  苏承刚  张兴国 《西南大学学报(自然科学版)》2011,33(10)

克隆了拟南芥热激因子AtHSFa1a,并由热激启动子AtHSP70b控制,构建了双元表达载体pV-70bAtHSFa1a,并经农杆菌介导转化烟草,获得了转基因植株,并检测了其耐热性指标.结果显示:与对照相比,转基因烟草的电导率较低,丙二醛含量增幅较小,SOD酶活性较高,初步表明其对高温具有更高的耐受性.  相似文献   

缺少赖氨酸、钙和磷日粮中添加植酸酶对猪生长性能和屠体性状的影响     

S L Johnston  E D Frugé  T D Bidner  L L Southern  黄美峰  李彩霞  王仁华  王琤 《饲料与畜牧》2009,(5)

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