3.2. The effect of water spinach floating bed
3.2.1. Landscape improvement by water spinach floating bed
A total of 180 bamboo rafts were put into the selected drainage river as shown in Fig. 1(b). During the fastest growing period, water spinach could occupy 80% of the whole river. In addition, water plants could not only improve water quality of crab pond, but also provide a safe space for their perching and living and it is the best natural food for crab. Thus, 20 bamboo rafts of water spinach floating bed were put into the crab pond