仔鸭实验性食盐缺乏症的症状和病理变化观察

用含食盐量不同的全价日粮在自由饮水条件下，对樱桃谷雏鸭从1日龄起进行了喂饲试验．结果表明，喂饲不加盐日粮的雏鸭在7～18日龄期间全部发病死亡，出现典型的食盐缺乏症病状和病理变化．喂饲0．15％低盐日粮的雏鸭则表现食欲不振，生长发育较慢，但无死亡．     

微型试缫机研制简报

为满足鲜茧收购现场缫丝计价的要求 ,研制出微型试缫机。该机将动力传递、索绪、集接绪、停、捻鞘、络交等装置紧凑装配一体 ,可方便、快速、准确地对样茧的解舒率、茧丝长、解舒丝长、茧丝量、出丝率、缫折、茧丝纤度等茧丝性状指标进行检测。样机试用证明其性能达到四川省及国家的《桑蚕鲜茧》试缫标准     

择食饲喂对肉鸡胴体品质和胃肠道发育的影响

试验研究择食饲喂对肉鸡胴体品质、胃肠道发育的影响。144羽22日龄艾维茵(Avian)肉鸡随机分成3个处理,每个处理4重复,每重复12羽,分别饲喂粉碎玉米+浓缩料、豆粕+平衡料的试验日粮和基础全价对照日粮,每处理均设两个食槽。结果表明:①择食饲喂玉米+浓缩料可显著促进肉鸡胃肠道发育(P<0.05),改善肉鸡的健康状况;②择食饲喂对肉鸡胴体品质的影响差异不显著(P>0.05),但择食饲喂玉米组能蛋比较高,腹脂率偏高。     

长大长与杜长嵊杂交组合猪肥育效果的比较

在我公司现有的饲料条件下，对40头内元猪和40头外元猪进行了肥育比较试验，结果表明：长大长猪料重比2．87：1，杜长嵊猪2．83：1；长大长猪日增重452g，杜长嵊猪日增重460g；成活率杜长嵊猪100％，长大长猪95％；杜长嵊猪的肉质等级也比长大长猪略高。     

草地休牧、禁牧期家畜饲草供给模式探讨

针对内蒙古奈曼旗草地休牧、禁牧期草食家畜可利用饲草数量不足、质量较差、利用率偏低的问题，通过试验示范的方式推广了天然草地围封改良、补播改良、优质混播人工草地建植、高产饲料地建植等适用增产技术和青贮、微贮处理技术等提高饲草利用率的措施。综合考虑当地舍饲家畜畜群变动规律、饲草需求特点以及各类饲草资源的供给时间特性，分别提出适合全年禁牧和季节性休牧条件下草食家畜饲草均衡供给模式。     

1999—2000年全国红麻新品种（系）区域试验总结

“九·五”第二轮全国红麻新品种 (系 )区域试验于 1 999— 2 0 0 0年在分布于全国红麻主产区的八省九点进行 ,由中麻所等科研单位提供的参试品种 (系 )共 8个 ,其中对照为红引 1 35。全文对七点二年三重复的 8个参试品种 (系 )纤维产量进行了统计和方差分析 ,并对相关的几项变异来源进行 L SD法测验及稳产性和适应性参数的估算 ,同时结合参试品种的主要农艺性状、生物学特性、抗逆性、纤维品质、生育期方面进行综合分析与评价。     

Feeding habits of the darkfin hind Cephalopholis urodeta (Serranidae) at Iriomote Island, southern Japan

ABSTRACT: The feeding habits of the serranid fish Cephalopholis urodeta were examined on the basis of 204 adult specimens collected from coral reef areas at Iriomote Island, Ryukyu Islands, Japan. Sampling was conducted in November 1997 and February, May, and August 1998. Among the specimens, 95 (46.6%) had empty stomachs, the mean Stomach Fullness Index of the specimens overall being extremely low (0.6). Over a 1-year period, the most important prey of this species were small fishes and decapod crustaceans, the two categories together constituting 73.4% of stomach contents by weight. However, seasonal differences in basic dietary composition were apparent. Fishes were abundant in the diet in May and November, whereas the proportion of hermit crabs in the diet was higher in February compared to other months.     

EM应用于蚕业生产的试验初报

EM是有益微生物菌群的英缩写,它主要含有五大菌群;光合菌群、乳酸菌群、酵母菌群、放线菌群、醋酸杆菌。初步试验表明：用2%的EM原露每天给蚕添食一次,可以增产约10%,降低蚕病死亡率40%～72%。     

Functional relationships between Collembola and plant pathogenic fungi of agricultural soils

The interactions between the collembolan Mesaphorura krausbaueri and four soilborne plant pathogenic fungi all living in the same layer of agricultural soil were studied under laboratory conditions. Mycelia of Gaeumannomyces graminis var. tritici, Fusarium culmorum and Rhizoctonia cerealis were palatable to Collembola and were a food source adequate for reproduction. Hyphae of Bipolaris sorokiniana were toxic and repellent for M. krausbaueri, but its conidia were eaten and proved to be a sufficient diet for reproduction. The four fungi fed had a different impact on the life processes of M. krausbaueri. Depending on the species of fungus, the animals produced significantly different numbers of eggs and had different life spans. In particular, animals fed with G. graminis var. tritici showed early maturation, early burst in egg production, early loss of fertility and early death. The different nutritional values of the four fungi pathogen for cereals might have a different influence on the life strategy of Collembola in the field. Thus, since these fungi usually coexist in agricultural soils, though in different percentages, this influence might also affect the capacity of different fungi to attack the plant and thus modulate the appearance of disease.     

综合评估1998年安徽省双季晚粳区域试验品种(组合)

应用灰色关联分析法对安徽省 1998年双季晚粳区域试验新品种 (组合 )的丰产性、区域适应性进行综合评价 ,为安徽省双季晚粳新品种审定和适区推广提供科学依据