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| 淮北砂姜黑土区氮钾配施对小麦产量及氮、钾养分吸收利用的影响 |
| Effects of Combined Application of Nitrogen and Potassiumon on Yield and Nutrient Accumulation of Wheat in Huaibei Lime Concretion Black Soil Area, China |
| 投稿时间：2016-10-13 |
| DOI：10.13254/j.jare.2016.0248 |
| 中文关键词: 氮钾配施，小麦，产量，养分吸收，肥料效益 |
| 英文关键词: combined application of N and K, wheat, yield, nutrient absorption, fertilizer benefit |
| 基金项目:公益性行业（农业）科研专项（201503122）；安徽省农业科学院院长青年创新基金项目（16B1019）；安徽省小麦产业技术体系项目 |
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| 中文摘要: |
| 为给淮北砂姜黑土区小麦生产中氮、钾肥的科学施用提供理论与技术依据，采用田间试验研究了不同氮、钾水平（N：180、240、300、360 kg·hm-2；K：90、135、180 kg·hm-2）对小麦产量、氮钾养分吸收利用以及肥料效益的影响。结果表明：（1）N240K180处理下小麦产量为7 686 kg·hm-2，比低氮低钾（N180K90）处理的小麦产量显著提高7.24%，与高氮高钾（N360K180）处理的小麦产量无显著性差异；（2）氮、钾肥配比施用时两者存在正交互作用，该交互作用与小麦产量呈极显著正相关，对产量的贡献率为14.06%，且提高了氮、钾肥的偏生产力；（3）与低氮低钾（N180K90）处理相比，N240K180处理下小麦植株体内氮、钾素含量分别提高14.67%和29.53%。综合考虑小麦产量和肥料效益，本研究条件下淮北砂姜黑土区适宜的氮（N）、钾（K2O）肥施用量分别为240 kg·hm-2和180 kg·hm-2。 |
| 英文摘要: |
| To provide theoretical and technical basis for the scientific application of nitrogen (N) and potassium (K) fertilizer in wheat cropping in Huaibei lime concretion black soil area, a field experiment was performed to study the effects of different N and K treatments (N:180, 240, 300, 360 kg·hm-2;K:90, 135, 180 kg·hm-2) on wheat yields, absorption of N and K, and fertilizer benefits. The results showed that: (1)The wheat yield under application of N240K180 reached 7 686 kg·hm-2, which was significantly increased by 7.24% comparing with that under N180K90, and there was no significant differences between the yields under N240K180 and N360K180; (2)Compared with the contents of N and K in wheat under N180K90, those under N240K180 were significantly increased by 14.67% and 29.53%, respectively; (3)There was a positive interaction between the application of N and K fertilizer, and the interaction was significantly correlated with wheat yield at a contribution rate of 14.06%, which consequently increased the partial productivities of N and K fertilizer. Considering wheat yield and fertilizer benefit, the optimum application amounts of N and K2O fertilizer were 240 kg·hm-2和180 kg·hm-2 in Huaibei lime concretion black soil area. |
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