优质杂交水稻新组合‘博Ⅱ优818’在琼西北部种植表现及高产栽培技术

‘博Ⅱ优818’是海南省农业科学院粮食作物研究所近年来用‘博Ⅱ-Ax海恢818’组配育成的又一个弱感光料型的优质高产杂交水稻新组合。2013年引入琼西北部少数黎苗族稻作区作多点试种,表现出株型适中、叶片适中、后期熟色好、适应性广、高产稳产、米质优等特点。大面积种植每公顷产7 500.0~7 608.0 kg。栽培技术:晚造以7月上中旬播种,播种前做好种子消毒,播后培育壮秧,适时移栽,抛栽27.0~28.6万株/hm~2,手插秧以30~35万兜为宜,插植规格18 cm×20 cm;移栽时重施基肥,插后5~7 d结合除草追施化肥;科学控水;注意防治白叶枯病、纹枯病,细菌性条斑病、稻飞虱、稻纵卷叶螟,三化螟等病虫害。

Performance and High-Yielding Cultivation Techniques of High Quality Rice Hybrid Bo II 818 in the Northwest of Hainan

Paddy rice variety 'BoⅡ 818' is a high-yielding rice hybrid of a new combination between'BoⅡ-Ax and Haihui 818', and it is weak in photosensitivity. This hybrid has been cultivated by the Hainan Academy of Agricultural Sciences in Hainan in recent years. In 2013, a multi-point trial for this hybrid was conducted in the northwest of Hainan. The hybrid was moderate in plant type, adequate in leaf size, and good in rice color at the late maturity stage. It yielded high and stable with wide adaptability and high rice quality. The hybrid yielded 7500.0~7608.0 kg/ ha on a large scale. For late cropping it is sown in mid July. The seeds should be disinfected before sowing, and robust seedlings should be raised after seed are sown, and transplanted at an adequate time. Seedlings were transplanted by throwing at a rate of 270~286 thousand/ha and by hand at 300~350 thousand /ha at a spacing of 18 cm × 20 cm. Basal manure should be applied at transplanting and chemical fertilizer be dressed in combination of weeding 5~7 days after transplanting. Water for irrigation should be controlled scientifically. The main diseases and pests to be controlled include white leaf blight, sheath blight, bacterial stripe disease, rice plant hopper, paddy leaf roller borer, yellow rice borer, among others.