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河蟹人工半咸水工厂化育苗技术自1985年在安徽省推广以来,各项操作程序不断得到改进和完善。现结合宣州市蟹苗厂五年来的五次育苗作一总结。一、亲蟹的选择及抱卵蟹的培育 1.亲蟹选择应按择优的原则,选择活力强健、形体饱满、附肢齐全、无外伤、体色青绿、腹白、壳硬无畸形,规格150—250g的成蟹作亲蟹,这样的亲蟹怀卵量大、排苗整齐,从排苗开始数小时可达排苗高峰。 2.亲蟹培育应专池进行,每平方米不超过2只,培育期间投饲要定时定量,饲料要新鲜。植物性饵料以山芋、大麦
Crab Artificial brackish water plant seedling technology since its promotion in Anhui Province in 1985, the operating procedures continue to be improved and improved. Now combined with Xuanzhou City Crab Plant five years of nursery for a summary. First, the choice of crab and crab nurturing crab 1. Crab selection should be based on the principle of choice, strong vitality, full body, complete appendages, no trauma, body color green, abdominal white, shell without deformity, specifications 150 -250g of crabs for crabs, crabs such a large number of oviparous, educt tidy up to several hours from the emergence of rice seedlings up to row peak. 2. Crab breeding should be a special pool, no more than 2 per square meter, during feeding to regular quantitative, feed to be fresh. Botanical bait to potato, barley