根据2002年早、晚季的小区试验,无论是早稻还是晚稻,免耕抛栽叶龄均以3.5~4.5叶抛栽较好,此叶龄抛栽有利于早立苗、早分蘖、早够苗,有利于提高有效穗数、穗粒数、千粒重,进而提高产量,本试验比大龄秧可增产10%~60%。 According to the plot test of early and late seasons in 2002, no matter the early or late rice, the throwing age of no-tillage throwing is 3.5 ~ 4.5 leaf throwing planted better, this leaf throwing throwing is conducive to early stubble, early tillering, early enough Seedlings, help to improve the effective panicles, grains per spike, 1000-grain weight, thereby increasing the yield, the test can increase yield 10% to 60% older seedlings.