高产杂交籼稻新组合“特优649”产业化技术研究I 密度及主要肥料因子对产量的影响

试验采用裂区设计，以肥料为主区，密度为副区，研究高产杂交籼稻新组合“特优649”的密度和氮肥、磷肥、钾肥施用量与产量的关系，结果表明：当密度为37.5万穴/hm2，或株行距为20cm×13.2cm，氮肥施用量为225kg纯氮/hm2，其N，P2O5，K2O的比例为1.0:0.5:0.8时，产量最高，平均达9.24t/hm2，最高达9.36t/hm2。据此提出产量指标为9.0 t/hm2以上的优化农艺措施组合为：每hm2密度37.5万穴，每穴插2粒谷秧，纯氮用量225kg，P2O5用量112.5 kg ，K2O用量180.0kg，其中基肥为猪牛粪22.5t+30kg过磷酸钙；试验还提出了相配套的水分运筹方法。

Study on the Techniques for Commercial Production of the High and Stable Yielding Indica Hybrid Rice New Combination "Te You 649" I The Effect of Plant Density and Major Fertilizer Factors on the Yield

The experiment design was the split-plot design with fertilizers as main plots and plant densities as subplots. The trial was designed to test the effect of three plant densities on the subsequent production of “Te You 649” at two levels of nitrogen fertilization. The result showed that the yield reached the highest, 9.36t/ha, when the plant density was 375,000 hills/ha (plant spacing=20cm×13.2cm) at the nitrogen fertilization of 225kg. Accordingly, a desirable agronomic measure combination for attaining a grain yield of above 9.0t/ha was proposed to be 375,000 hills/ha of plant density with 2 grain-seedling per hill, 225kg pure nitrogen/ha, 112.5kg P2O5/ha and 180kg K2O/ha. A package water management method was also introduced.