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一、试验目的八○、八一两年铜仁地区油菜品种区试结果表明,锦油一号、B16、湘油2号综合性状较好,产量较高。为了探索这些品种在不同种植密度、不同氮肥施用量的情况下对产量的影响,特进行了本试验。二、试验设计采取“三因素、三水平”的正交设计。因素A为品种。它们分别是:B16、锦油一号、湘油二号;因素B为种植密度。三个水平是:(1)行窝距为10寸×7寸,双株留苗(下同),每亩17142株。(2)12寸×7寸,每亩14286株。(3)15寸×7寸,每亩11428株;因素C为氮肥施用量。以每亩追施含N46%的尿素计。三个水平分别是: 15斤/亩,25斤/亩,40斤/亩。施肥总量在生育期内分三次追施,即:苗肥30%,腊肥50%,苔花肥20%。列因素水平表如表一。
I. Test Purposes The results of the regional test of rapeseed varieties in Tongren Prefecture in 1980 and 1982 show that the comprehensive traits of Jinyou 1, B16 and Xiangyou 2 are better and the yields are higher. In order to explore these varieties in different planting densities, different nitrogen application rate of the case of the impact on yield, especially the test. Second, the experimental design to take “three factors, three levels,” the orthogonal design. A factor for the species. They are: B16, Kam oil one, Hunan oil two; factor B planting density. The three levels are: (1) Row spacing is 10 inches × 7 inches, double strains of seedlings (the same below), 17,142 strains per acre. (2) 12 inch × 7 inch, 14286 plants per acre. (3) 15 inch × 7 inch, 11428 plants per mu; factor C is the amount of nitrogen fertilizer. Top up with N46% urea per acre. The three levels are: 15 kg / mu, 25 kg / mu, 40 kg / mu. The total amount of fertilization in the growth period in three times topdressing, namely: 30% of Miao, 50% of waxy, moss, 20% fertilizer. Column factors table in Table 1.