多年来，池塘养蟹选用何种水草持续地提供植物性饲料，是养蟹的一项关键技术。一般以种植苦草、水花生等水生植物为主，但由于池塘养蟹密度高、河蟹摄食量大，上述水生植物多因生长周期、产量、品质等因素不能满足池塘养蟹的需要。 空心菜口味甜，质柔嫩，粗纤维少，生长速度快 Over the years, pond crabs choose which plants and herbs to provide continuous plant feed, crab is a key technology. Generally planted with bitter grass, peanut and other aquatic plants, but due to high density of crabs ponds, crab consumption, the aquatic plants due to growth cycle, yield, quality and other factors can not meet the needs of pond crabs. Dried convolvulus tastes sweet and tender, with less crude fiber and faster growth