不同本田施肥方法对培两优特青制种的影响

Effects of Fertilizing Methods on the Seed Production of Two-line Hybrid Rice Peiliangyou Teqing

探讨了不同本田施肥方法对两系制种的影响。指出施足基肥，有机肥经堆沤腐熟后深施，氮、磷、钾 配合施用，控制后期氮肥用量，适当增加钾肥比重是促进两系制种高产的关键，为两系制种科学施肥提供了依 据。

The effects of five methods treatments of applying fertilizers in the main field were studied on the seed production of Peiliangyou Teqing, a two-line hybrid rice. Treatment 1, applying 450 kg/hm complex fertilizer (CF) with the contents of N, PO, KO=13.45%, 6.36%, 13.38% as basal fertilizer; Treatment 2, applying 22.5 t/hm2 well-rotted manure before ploughing and dressing 450 kg/hm2 CF before transplanting; Treatment 3, dressing 450 kg/hm2 CF and 22.5 t/hm2 unrotted manure before transplanting; Treatment 4, applying 450 kg/hm2 CF as basal fertilizer and dressing 225 kg/hm2 CF 5～6 days after transplanting; Treatment 5, applying 450 kg/hm2 CF as basal fertilizer, dressing 300 kg/hm CF and 75 kg/hm2 Urea at secondary branch and spikelet primordia differentiation stage of young panicles. The results showed that Treatment 2 was highest in effective panicles per plant, spikelets per panicle, outcrossing rate and 1 000-grain weight, moderate in flag leaf length and low in incidence of kernel smut, resulting in the highest seed yield (3.52 t/hm2). It is concluded that applying enough basal fertilizers including well-rotted manure and controlling the amount of N fertilizers in the late growth stage is an effective fertilizer-applying method to increase the yield of seed production for a rich and sustainable supply of nutrients in the whole growth and development stage.