氮肥不同运筹方式对茄子产量和硝酸盐含量的影响

Effects of Different Planning and Management of Nitrogen Fertilizer on Yield and Nitrate Content of Eggplant

[目的]为了确定茄子的最佳施用氮肥量和最佳运筹方式。[方法]通过田间试验,研究不同施氮量和不同运筹方式对茄子产量和硝酸盐含量的影响。[结果]茄子产量和硝酸盐含量随着施氮量的增加而增加,当施氮量超过330 kg/hm2时,茄子的产量反而下降,硝酸盐含量则以更大幅度增加。氮肥分次优化施用处理产量在0.05水平显著高于农民习惯施肥和氮肥全部用于追肥处理,硝酸盐含量则在0.05水平显著低于农民习惯施肥和氮肥全部用于追肥处理。[结论]当地茄子最佳施氮量为330 kg/hm2,最佳运筹方式为分次优化施用。

[ Objective ] The research aimed to ascertain the optimum applying amount and the optimum applying nitrogen fertilizer period of eggplant. [ Method ] The effects of different planning and management of nitrogen fertilizer on yield and nitrate content of eggplant were studied with field trial. [ Result] The yield and the nitrate content of eggplant increased with the increase of the applying amount of nitrogen fertilizer. The yield of eggplant decreased, and the nitrate content increased significantly when the applying amount was above 330 kg/hm2. The yield of the splitting application of nitrogen fertilizer treatment was higher than those of the farmer＇ s practice and applying all fertilizer in topdressing treatment,while the nitrate content was decreased significantly. [ Conclusion ] The optimum applying amount of nitrogen fertilizer in eggplant production was 330 kg/hm2, and the optimum application mode was splitting application.