不同时期追氮对水稻宜香优2115翻耕直播产量的影响

Effects of Nitrogen Topdressing at Different Stages on the Yield of Rice Yixiangyou 2115

为了提高翻耕直播水稻施肥效果,2018年以宜香优2115为试验材料,在天柱县高酿镇开展不同时期施用氮肥试验。结果表明:施用基肥40kg/亩(满山红水稻专用肥),2叶期施用尿素4kg/亩,5叶期施用尿素4kg/亩,六叶一心施用尿素8kg/亩和氯化钾10kg/亩,有利于秧苗的健壮生长,提高分蘖能力和成穗率,增加亩有效穗,有利于光合产物干物质积累,实现单产689.13kg/亩。

In order to improve the effect of direct seeding rice fertilization,Yixiangyou 2115 was used as the experimental ma⁃terial to carry out nitrogen fertilizer application tests at different periods in Gaoman Town,Tianzhu County in 2018.The results show that the application of basal 40kg/mu(full mountain red rice fertilizer),stage 2 leaf fertilizer urea 4kg/mu,5 leaf stage ap⁃plying urea 4kg/mu six leaf 8kg/mu with application of urea and potassium chloride 10kg/mu,promotes the robust growth of seedlings,improve the ability of tillering and earing rate,increase the effective ear,mu is beneficial to dry matter accumulation of photosynthetic products,achieve yields 689.13 kg/mu.