杂交稻的增产优势在于穗大粒多，但对气候和栽培条件较敏感，如遇不良条件，结实率低于3O％。因此，提高结实率是双晚杂交稻能高产稳产的重要环节。1．培植壮秧杂交晚稻要获得高产，培育适龄、矮壮、多桑的壮秧是基础。试验表明，栽植带桑的秧苗，结实率比无案秧高3．7％～5．7 The yield advantage of hybrid rice lies in the large spikelets, but it is more sensitive to climate and cultivation conditions. In case of adverse conditions, the seed setting rate is less than 30%. Therefore, improving the seed setting rate is an important part of double-late hybrid rice with high and stable yield. 1. Breeding strongbred late hybrid rice to obtain high yield, age, short stature, mulberry seedling is the foundation. Tests showed that planting seedlings with mulberry, seed setting rate than the high 3.7% ~ 5.7