论文部分内容阅读
革胡子鲶是从非洲引进的鱼种,在我国推广养殖后,成效很好。它具有生长快、适应性强、耐密养、杂食性和营养价值高等特点。近年来,它已逐渐成为农村家庭养殖的主要鱼种,因为它在农村家庭小池塘内养殖具有以下四个相应的优越条件。 1、农村容易收集动物性饲料 革胡子鲶属于杂食性鱼类,但以动物性饵料为最好。据试验,投喂动物性饵料(螺、蚌等及其它畜禽肉类)比投喂植物性饵料的生长速度快1~1.5倍。若大面积养殖大量的革胡子鲶就要收集投喂大量的动物性饵料,这比较困难。农村家庭小池塘养殖较少量的革胡子鲶,需要饵料也较少,而在盛产螺、蚌等的河、沟、水塘等收集动物性饵料,就比较容易办到,能够保证供应。 2、革胡子鲶耐密养 它的成鱼养殖密度每亩可放5000~6000尾,比混合放养青、草、鲢、鳙等
Catfish leather catfish imported from Africa species, in China to promote aquaculture, the effect is very good. It has the characteristics of fast growth, strong adaptability, dense keeping, omnivorous and nutritional value. In recent years, it has gradually become the main species of fish farming in rural families because it is cultured in small ponds in rural families and has the following four corresponding advantages. 1, easy to collect animal feed in rural areas Catfish is a omnivorous fish, but animal feed is the best. According to the test, the feeding of animal bait (snails, clams and other livestock and poultry meat) is 1 to 1.5 times faster than the feeding of plant bait. It is difficult to collect and feed a large amount of animal feed if large-scale cultivation of large leathery catfish. Small ponds in rural families produce smaller amounts of leathery catfish and require less food. However, it is relatively easy to collect animal feedstuffs such as rivers, ditches and ponds rich in snails and mussels, thus ensuring supply. 2, Cattle leather catfish keep its dense density of its adult fish breeding density per acre can be put 5000 ~ 6000, than the mixed stocking green, grass, silver carp,