细菌素在饲料中的应用

细菌素 (Ｂａｃｔｅｒｉｏｃｉｎ)由于其种类多、无毒、大部分基因位于质粒上、分子量小、含修饰氨基酸、结构复杂等特点 ,被认为是分子遗传、基因工程、蛋白质工程、食品添加剂、化妆品、皮肤保健、抑制病原菌和调节肠道菌群的好材料。随着饲料中益生菌的推广使用和人们对饲料卫生的重视 ,细菌素在饲料中将会得到广泛的应用。1　细菌素的研究进展细菌素是 2 0世纪 2 0年代中期Ｇｒａｔｉａ( 1 946)对大肠杆菌Ｖ菌株抑制Φ菌株现象进行研究时发现的 ,以后Ｇｒａｔｉａ和Ｆｒｅｄｅｒｉｃｑ对Ｖ菌株产生的抑制物质进行分离 ,发现这种物质类似…     

草菇反季节栽培技术

番禺地区传统上适宜栽培草菇的季节是4—10月,即在晚春、夏季、早秋季节栽培;由于冬季气温寒冷,难以栽培,极少生产。如何使草菇能够周年生产,经过长期的实践试验,我们探索出一套较为成功,行之有效的草菇反季栽培技术。一现简介如下。1.菇房构造:菇房位置宜背北向南或东西向,     

香菇三种栽培方式比较试验

香菇代用料室内栽培,目前常用的栽培方式有压方块(砖式)栽培、压柱块(柱式)栽培和直接脱袋(袋式)栽培三种。为了探索这三种出菇栽培方式对香菇产量的影响,我们于1986年冬至1987年春进行了比较试验,现将结果简述如下:材料和方法供试品种为广香47号,引自广东省微生物研究所。母种和原种按常规方法制作。栽培种培养基配方为蔗渣80%、麦皮20%,于1986年10月20～25日制作,采用17×33×0.06厘米的聚丙烯塑料薄膜袋作容器,每袋装干料250克。试验于86年12月25日脱袋和压块。砖式栽培规格为25×25×8厘米的木模压块,用料每块为6袋栽培种,共压制8块,耗用48袋栽培种;柱式栽培规格为高30厘米、直径12厘米,用料为3袋栽培种,共压制18个菌柱,耗用栽培种54袋;直接脱袋栽培为28袋。三种栽培方式的出菇管理相同,每潮菇采后都用浸水催蕾。     

40%氟硅唑乳油对葡萄白粉病的防治效果

40％氟硅唑乳油是防治葡萄白粉病痛害的治疗性杀菌剂研究结果表明，40％氧硅唑乳油6000～8000倍，在葡萄白粉病发生初期用药，间隔10d施药1次，能有效控制住葡萄白粉病的危害。     

手工检索与计算机检索比较研究

从手工检索和计算机检索的概念入手，论述了手工检索和计算机检索各自的优势和不足之处，以及二者之间的相互关系，认为手工检索和计算机检索将长期共存，二者互为补充、相得益彰、不可偏废。     

Evaluation of adaptability of naked oat varieties in the alpine region of North China based on the AMMI model and GGE Biplot北大核心CSCD

In order to comprehensively evaluate the productivity, stability and adaptability of varieties of naked oats, as well as the discriminative power and representativeness of testing sites in the alpine region of North China, data for six naked oat varieties and six testing sites in 2019 were analyzed and evaluated using the AMMI （additive main effects and multiplicative interaction） model and GGE （genotype main effect plus genotype-environment interaction） biplot. It was found that analyses of naked oats regional trial results using the two methods together reduced the statistical error and increased the ability to declare variety means significantly different, compared to traditional ANOVA methods. It was found that genotype, environment, and genotype×environment interaction effects all contributed to differences in grain yield. Variety 200910-28-4-3（G2） showed the best performance in both grain yield and stability of yield across sites, followed by varieties 200910-5-2（G3） and 200910-22-1（G4）. In terms of the selection of regional adaptability test sites for varieties, Ulanqab pilot in Inner Mongolia had both good representativeness and strong discriminability, and was the most ideal test site. Chongli Shizigou Seed Farm and Zhangbei Base were also comparatively good test sites. This study provided a scientific evaluation of methodology for performance testing of naked oat varieties in the alpine region of north China and the results basis will assist future breeding and promotion. © 2022 Editorial Office of Acta Prataculturae Sinica. All rights reserved.