超级稻南粳9108大壮苗育秧技术条件下适宜机插密度研究

Study on the Suitable Machine Transplanting Density of Super Rice Nanjing 9108 with the Technique of Old and Robust Seedling Raising

南粳9108为生产上优质食味超级稻。以南粳9108为试验材料,研究大壮苗育秧技术及常规中小苗育秧技术两种方式下,不同栽插密度对南粳9108田间茎蘖动态变化及其产量形成的影响。研究发现,相比常规中小苗育秧技术,大壮苗育秧处理下适当降低机插密度易使南粳9108攻取高产。行穴距30 cm×13 cm是南粳9108大壮苗育秧机插获得高产的较优配置。

To provide theoretical reference and data support for the determination of suitable transplanting density of high quality super rice Nanjing 9108 cultivated by the technique of old and robust seedling raising technique, the Nanjing 9108 was used as the experimental material. The effects of different planting density on the dynamic change of tiller and yield of Nanjing 9108 were studied. It was found that compared with the conventional medium and small seedling raising technique, the high yield of Nanjing 9108 could be easily obtained by properly reducing the density of seedling under the treatment of old and robust seedling. The hole spacing of 30 cm × 13 cm is the best arrangement for high yield of Nanjing 9108 mechanical transplanting with the technique of old and robust seedling rasing.