摘要
为探究马铃薯(Solanum tuberosum)淀粉渣最优的青贮方式,本研究分别以马铃薯淀粉渣(PP)、马铃薯淀粉渣+玉米粉(PC)、马铃薯淀粉渣+燕麦草粉(PG)作为青贮原料,再以添加乳酸菌(LAB)作为处理,以添加等量蒸馏水作为空白对照(CK),经过30d发酵后,对所有青贮饲料发酵品质进行测定。结果发现:1)PG青贮的粗蛋白(crude protein,CP)相比于PG、PP青贮显著降低(P<0.05),而PP青贮和PC青贮的差异不显著(P>0.05)。2)PP、PC和PG青贮中性洗涤纤维(neutral detergent fiber,NDF)含量差异显著(P<0.05),与CK相比,添加LAB后PP、PC青贮的NDF和PP青贮的酸性洗涤纤维(acid detergent fiber,ADF)含量显著降低(P<0.05)。由于添加了NDF和ADF含量较高的燕麦草粉,PG青贮组NDF和ADF显著高于其余两组处理(P<0.05)。3)PP和PC青贮的相对饲喂价值(relative feed value,RFV)显著高于PG青贮(P<0.05)。4)与淀粉渣原样相比,各个处理青贮后的pH均有不同程度的降低,乳酸含量显著升高(P<0.05)。PC青贮pH显著低于PP和PG青贮。青贮饲料在添加LAB后,PC青贮组的pH和PG组的丙酸含量显著降低(P<0.05),PG青贮组的总酸含量显著升高(P<0.05)。综合适口性以及青贮后的化学成分和发酵品质各项指标,马铃薯淀粉渣和玉米粉混合青贮效果较好,而添加乳酸菌后青贮效果更佳。
The objective of the study is to evaluate the optimal method for potato pulp silage (Solanum tuberosum) preparation.Three mixing treatments were performed with pure potato pulp (PP),potato pulp mixed with ground corn (PC), or with oat hay meal (PG).Lactobacillus (LAB) was added or not added during silage making.Distilled water was added as a control (CK).The silage samples were collected for further analysis after 30 days.The following results were obtained.1) The crude protein (CP) contents of PG treatment were significantly reduced compared to PG and PP treatments (P < 0.05), while no significant difference was observed between PP and PC treatments (P > 0.05).2) The neutral detergent fiber (NDF) contents of PP,PC,and PG treatments were significantly higher than CK (P < 0.05).After adding LAB,the contents of NDF in PP and PC treatments and the contents of ADF in PG treatment were significantly lower than CK (P < 0.05).The highest NDF and ADF contents were shown in PG treatment (P < 0.05).3) The relative feed value (RFV) of PP and PC treatments was significantly higher than PG (P < 0.05).4) Compared with the original sample of potato starch residue,the variation in pH of silage samples decreased,and the lactic acid content increased significantly (P < 0.05).The pH of PC silage was significantly lower than that of PP and PG silage.After adding LAB,the pH of PC silage and the propionate contents of PG silage decreased,and the total volatile fatty acid (TVFA) contents of PG silage increased significantly (P < 0.05).In conclusion,the optimum silage treatment for potato pulp is to mix with ground corn.The addition of LAB can promote the silage fermentation quality.
作者
魏海燕
闫琦
王宪举
丁路明
WEI Haiyan;YAN Qi;WANG Xianju;DING Luming(State Key Laboratory of Grassland Agro-ecosystems,School of Life Sciences,Lanzhou University,Lanzhou 730000,Gansu,China)
出处
《草业科学》
CAS
CSCD
2019年第6期1653-1661,共9页
Pratacultural Science
基金
青海省重大科技专项(2018-NK-A2)
青海省重点研发与转化计划项目(2018-SF-145)
青海省重点实验室专项(2003-Z-Y03)
青海省科技支撑计划项目(2017-NK-154)
甘肃省科技计划项目(17YF1WA164)
兰州大学中央高校基本科研业务费专项(lzujbky-2018-kb07)
关键词
马铃薯淀粉渣
混合青贮
饲料发酵
发酵特性
乳酸菌
青贮品质
营养价值
potato pulp
mixed silage
feed fermentation
fermentation property
lactobacillus
fermentation quality
nutritivevalue
