水稻育秧专用肥在早稻上的应用效果研究

Study on Effects of Applying Special Fertilizer for Growing Rice Seedlings to Early Rice

将自行研制的水稻育秧专用肥与壮秧剂、化肥进行了应用效果比较试验。试验结果表明,水稻育秧专用肥与生产上推广的壮秧剂比较,应用于早稻育秧,能提高成秧率5个百分点左右,促进秧苗矮壮多蘖,提高出叶速率,促进地下部生长,提高根冠比和秧苗充实度,提高秧苗综合素质;与化肥比较,其秧苗素质更优。经育秧专用肥处理的秧苗移(抛)栽到大田后,返青快,始蘖期提早2d,前期的分蘖速率快,低节位分蘖发生率高,苗峰低,成穗率高,有效穗多,每穗粒数一般也多,结实率高,抽穗期的叶面积系数大,干物质生产量多,产量较壮秧剂和化肥处理高。

Studies on effects of applying special fertilizer for growing rice seedlings(SFG RS), seedling-strengthening agent and chemical fertilizer to early rice were con ducted.The results showed that SFGRS,in comparison with seedling-strengthening a gent, could increase the ratio of seedling to seed by 5 percent,promote seedling to be shorter, thicker and has more tillers, accelerate the growth of leaf and underground part,raise the ratio of underground part to aboveground part and plumpness (ratio of dry weight to plan t height), enhance comprehensive quality of seedlings; On the other hand, in co mparison with chemical fertilizer, SFGRS could make the quality of seedling bett er.After being transplanted or thrown in the field, the seedling treated by SFGR S could return green rapidly, its initial tiller appeared two days earlier, velo city of tillering in early period and rate of tiller occurrence at low node we re higher, the seedling had lower seedling peak, higher rate of earbearing tille r, m ore valid panicles,more grains per panicle, higher setting rate, higher LAI at heading stage, more dry matter production. The yield of early rice treated by SF GRS was higher than that of early rice treated by seedling-strengthening agent a nd chemical fertilizer.