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近年来,小个蟹市场价一路走低,大个蟹一路走高且供不应求。欲养大个蟹,必须有无公害蟹种作保证。各地对无公害蟹种的需求与日俱增。2000年以来,我们利用稻田培育无公害蟹种,连年获得良好效果经济效益极为显著。现将无公害蟹种稻田培育技术总结如下:一、稻田的要求与施工稻田要?
In recent years, the market price of small crabs all the way down, big crabs all the way higher and in short supply. To raise a big crab, there must be pollution-free crab as a guarantee. The demand for pollution-free crab species has been increasing everywhere. Since 2000, we have used paddy fields to cultivate pollution-free crab species and have achieved remarkable results year after year. The economic benefits are extremely significant. Now pollution-free crab cultivation of rice cultivation techniques are summarized as follows: First, the requirements and construction of paddy fields to?