“秧好半熟稻”,秧苗壮,带分蘖,须根多,移栽后返青快,发棵早,容易获得早熟高产。培育壮秧,不仅要精细整地,管好肥水,还要给秧苗生长以足够的土地和空间。因此,留足秧田,确定合理的播种量是育好壮秧很重要的一环。一般说来,早稻秧田的播种量,是根据稻种的发芽率、预计成秧率、秧田利用率和秧龄来决定的。秧龄与密度的关系,大体上可以按如下标准来掌握,即: “Good seedlings of semi-cooked rice,” seedling Zhuang, with tillers, fibrous roots, transplanted back to green fast, hair trees early, easy access to early maturity and high yield. Nurturing strong seedlings, not only to fine preparation of soil, good fertilizer, but also to seedlings grow with enough land and space. Therefore, leaving enough seedling, to determine a reasonable sowing is a very important part of cultivating strong seedlings. Generally speaking, the sowing amount of early rice seedling is determined according to the germination rate of the rice seed, the projected seedling yield, the utilization rate of seedling and the seedling age. The relationship between seedling age and density, in general, can be mastered according to the following criteria: