【摘要】 研究了不同播种量、不同多效唑用量和不同播植密度对晚稻旱育秧秧苗素质和大田产量的影响。随着播种量的增加、秧苗素质下降，适宜的播种量为３０～４０ｇ／ｍ￣２；旱育殃苗期使用３００ｍｇ／ｋｇ多效唑能矮化秧苗，增加分蘖：旱育秧秧苗移栽后返青快，分蘖早，成穗率和结实率高，增产显著：在合理稀植（１３．３ｃｍ×２６．６ｃｍ或１３．３ｃｍ×３３．３ｃｍ）条件下，生长优势更强，产量增加１７％以上。更多还原

【Abstract】 The seedling quality of late rice and grain output are studied and comparedwith the upland nersery at different seedling amounts, paclobutrazal concentrations andplanting densities. In upland nersery the quality of riceseedlings became worse with in-creasing seedling amount,and 30～40g/m2 of seedling amount was proper.Appling 300mg/kgpaclobutrazal could shorten rice seedlings and increased tillers.After transplantation ,rice seedlings raised in upland nersery turned green and tillered immidiately and fastly ,and grain output also increased significantly.In rational sparse planting (13.3cm×26.6cmand 13.3cm×33.3cm),rice seedlings raised in upland nersery grew stronger and increasedgrain output by 17% or more.更多还原