水稻旱育浅植技术的特点及推广前景分析

CHARACTERISTICS OF GROWING SEEDLING IN UPLAND AND SHALLOWPLANTING TECHNIWUE OF RICE AND ITS POPULARIZATION PROSPECT

在黔东南州引试、推广水稻旱育浅植技术与两段育秧比较，旱育秧分集发生率高，分蘖势强，根系发达，秧苗素质高；返青期短，同期播种比两段秧早熟４～７d；产量构成中，旱育秧亩穗数、结实率、千粒重、亩产量均较两段秧高，亩产达６１６．７ｋｇ／亩；在大田生产中，控苗措施要求严格，采用减少播种密度，喷施多效吐等措施，可增加秧龄弹性，促进分蘖。随着旱育浅植综合技术措施的配套完善，旱育浅植技术适宜范围将逐步由冬闲田、蔬菜绿肥田向再生稻种植区、稻麦、稻油两熟区甚至三熟制地区扩展。

Compared with seedling by two-steps growing rice seedling(TSGRS),the seedling by using uplandgrowing technique showed stronger tillering ability, flourishing roots,more healthy and shorter revivingperiod.The growth stage of upland growing seedling and Shallow planting technique(UGSPT)was 4～7daysearlier than that of using TSGRS and the ears per mu,setting pencentage,1000 grainweight,yield per mu(616.7 kg)of UGSPT were higher than those of TSGRS.In the field production,the property of seedling ageand tillers can be improved by controlling seedling growth, reducing seeding density and applying paclobutra-zol(MET).With the improvernent of comprehensive technique of UGSPT,the new technique can bepopularlzed from the winter-fallow field or vegetable and green-manure field to the ratooning rice field,doublecropping fields of rice-wheat and rice-rape,even to the areas of triple-cropping system step by step.