对育苗中的稻苗进行踏踩，其目的有二：一是促进出苗整齐，二是使秧苗健壮。当自然出芽率接近 50％时，用一块与育苗箱大小类似的木板放在苗芽上， 1人站到木板上踏踩，使培土更加密实，压断刚露土的苗芽。稻苗出芽前种子已在土中扎根，压断苗芽仅使地上部分暂停生长，地下的种 The nursery seedlings in the tread step, its purpose is to: First, to promote the emergence of neat, the second is to make seedlings robust. When the natural sprouting rate is close to 50%, use a piece of wood board similar in size to the nursery box to place on the sprout. One person stands on the board and steps on it so as to make the earth more dense and crush the sprout of bare soil. Seedlings of rice seedlings have been rooted in the soil prior to budding, and the seedling buds are only allowed to halt the growth of the above-ground part. The underground species