【摘要】 为了探明宜香优2115山区水田直播高产栽培技术,采用单因子试验设计方法,研究直播条件下播种期、密度、追肥量对经济性状及产量的影响。结果表明:山区水田直播,随着播种期延后,株高降低,穗长变短,有效穗减少,实粒数与结实率、产量均降低,以4月10日播种的产量723.8 kg/666.7m~2为最高,4月20日播种的产量702.2 kg/666.7m~2居第二位;以密度12500穴/666.7m~2时产量794.8 kg/666.7m~2最高,密度15000穴/666.7m~2的产量739.7 kg/666.7m~2居第二位;追肥量以24 kg/666.7m~2时产量785.3 kg/666.7m~2为最高,产值2827.08元/666.7m~2,投入产出比3.23达最高;追肥量达到32 kg/666.7m~2时,产值2179.08元/666.7m~2,投入产出比降低到2.43;因此,宜香优2115在遵义区域直播栽培的最佳播种期为4月10～20日,最适宜密度12500～15000穴/666.7m~2,最佳追肥量为16～24 kg/666.7m~2。更多还原

【Abstract】 In order to integrate the high-yield cultivation technology for cultivating rice cultivar Yixiangyou 2115 by direct sowing method in paddy fields of mountainous area,a single-factor test design method was used to study the effects of sowing time,density,and amount of side-dressing application on economic characteristics and yield under the direct sowing conditions. The results showed that the plant height and the length of the ear became shorter,the effective ear,the number of filled grains,setting rate and yield were all reduced when postponed the sowing period. The yield of rice sown on April 10 was 723.8 kg/666.7 m~2,which,was the highest,and the yield was 702.2 kg/666.7 m~2 when sown on April 20,which ranked the second. The yield of 794.8 kg/666.7 m~2 at the density of 12500/666.7 m~2 was the highest,and the yield of 739.7 kg/666.7 m~2 at the density of 15,000/666.7 m~2 ranked second. The yield was 785.3 kg/666.7 m~2 with the amount of side-dressing application of 24 kg/666.7 m~2,while the output value was 2827.08 yuan/666.7 m~2,and the input-output ratio was the highest of 3.23. When the amount of side-dressing fertilizer reached 32 kg/666.7 m~2,the output value was 2179.08 yuan/666.7 m~2,and the input-output ratio was reduced to 2.43. Therefore,the best sowing time for direct-seeded Yixiangyou 2115 in the Zunyi area is April 10～20,the most suitable density is between 12500 and 15000 points/666.7 m~2,and the best side-dressing rate is 16～24 kg/666.7 m~2.更多还原