【摘要】 采用田间试验方法,研究了杂交中稻广两优272的营养特性与施肥效应。结果表明,在生育前期氮、磷需求量大,中后期钾素吸收量增加;对广两优272产量构成因子的影响大小依次为N、K、P;结合模拟的最佳施肥量和经济施肥量,推荐长江中下游地区中等肥力条件下的施肥量为氮(N)180~210 kg/hm2、磷(P2O5)70~100kg/hm2、钾(K2O)105~135kg/hm2。更多还原

【Abstract】 Nutritional characteristics and fertilizer effect on hybrid rice Guangliangyou 272 with field test method were studied.Results showed that nitrogen and phosphorus requirement in the early bearing, late potassium absorption increased. Fertilizer effect on its production constitute factor expressed N>K>P. Combined with simulation of the optimum of fertilizer and the economy of fertilizer, it was recommended that fertilizer fertility under the condition of medium fertility and lower reaches of the Yangtze river was N 180~210 kg / hm2, P2O570~100 kg / hm2, K2O 105~135 kg / hm2.更多还原