几项主要农艺措施对两系粳杂70优04的产量影响

Efects of main various Agricultural Measures on the Yield of Breeding of Late Japonica Hybrid Rice "70 you 04

针对７０优０４在江淮丘陵地区作单晚种植，进行了不同播期对产量影响的对比试验，及针对７０优０４在巢湖作双晚种植，采用正交试验设计，研究了播期、密度和大田施氮量对产承的影响。结果表明：７０化０４作单晚种植在滁州适宜播期为４月底５月初。作双晚种植在巢湖适宜播期为６月１０日至２０日；亩插穴数在２．５万至３．０万之间，亩插穴数对产量影响不显著，但宽窄行１０ｃｍ×２３ｃｍ、１０ｃｍ×２６．４ｃｍ的产量显著高于１３．３ｃｍ×１６．７ｃｍ；大田施氮量是在亩施纯氮１０ｋｇ产量最高。

In this paper, in1993, based on the effects of the time of sowing on the grain yield was comparatively studied in single-harvest rice in Chuzhou city, the effects of the time of sowing (A),density of planting (B), the amount of nitrogenous fertilizer applied (C) on the grain yield was studied by upright--crossing experiment design on ensuing rice in double-crop system in Chaohu city showed that the time of sowing is from late April tO earlyMay in single-harvest in Chuzhou city and from 10 to 20 June,in double-crop system in Chaohu city as late-grown rice. Planting in 10cm×26. 4cm. 10cm×23cm provided higher yield than that in 13. 3cm×16. 5cm,the amount of nitrogenous fertilize is N-10kg/mu.