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近年来螃蟹人工养殖发展很快,但人工养殖的蟹,存在壳硬、味不正、肉黄不饱满、鳃部发黑等问题。这些问题能否得到解决,直接影响着人工养殖螃蟹的开发前景。我们经过几年研究和调查,初步认为这些问题主要是饵料和水质等因素引起的。 一、饲料 螃蟹属杂食性动物,但偏喜食动物性饵料,如鱼、虾、贝、蚕蛹、蚯蚓、蝇蛆、畜禽内脏及腐尸体等。螃蟹喜食的植物性饲料有芝麻、三麦、玉米、豆类等,青饲料中有南瓜、甘薯和水浮莲、水花生、水浮萍、水葫芦等。饵料的优劣是影响螃蟹的肉质、壳、昧等的主要因素。科学地搭配饵料品种、投饵方法和投饵数量,也是加快螃蟹生长发育,提高品质必需的条件。
In recent years, the rapid development of artificial breeding of crabs, but the artificial breeding of crabs, shell hard, bad taste, not yellow flesh, gills and other issues black. Whether these problems can be solved directly affects the development prospects of crab farming. After years of research and investigation, we initially think these problems are mainly caused by such factors as food and water quality. First, feed crabs are omnivorous animals, but biased like animal feed, such as fish, shrimp, shellfish, silkworm pupa, earthworms, maggots, viscera and corpse of livestock and poultry and so on. Crab eating plant feeds are sesame, three wheat, corn, beans, green feed in the pumpkin, sweet potato and water lettuce, peanut water, duckweed, water hyacinth and so on. The pros and cons of food is the main factor affecting the quality of crab meat, shell, ignorant. Scientifically matching bait varieties, feeding methods and the amount of bait, but also to speed up the crab growth and development, improve the quality of the necessary conditions.