进入10月份以后,养殖的河蟹开始捕捉上市。为换取季节差价,可将河蟹通过塑料大棚增温囤养育肥至元 旦、春节前后销售,效益可显著增加。其技术要点介绍如下: 大棚按蔬菜大棚搭设方法搭建,有单层和双层两种结构。材料可选用竹竿,有条件者可用钢筋结构;另外 需备有适量的稻草席, Into October, breeding crabs began to capture the market. In exchange for seasonal differences, crabs can be raised through plastic greenhouse warming fattening to New Year’s Day, sales before and after the Spring Festival, the benefits can be significantly increased. The technical points are as follows: Greenhouses erected by the method of setting up greenhouses, there are two single and double structure. Material optional bamboo pole, the conditions are available reinforced structure; also need to have the appropriate amount of straw mat,