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| 施氮时期对糜子产量和氮素利用效率的影响 |
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王君杰1, 曹晓宁1, 王海岗1, 陈凌1, 刘思辰1, 田翔1, 秦慧彬1, 杨光宗2, 乔治军1
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| (1.山西农业科学院 农作物品种资源研究所/农业部黄土高原作物基因资源与种质创制重点实验室/杂粮种质资源发掘与遗传改良山西省重点实验室, 太原 030031;2.山西农业科学院院办公室, 太原 030031) |
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| 摘要: |
| 为研究糜子高产栽培的氮肥运筹模式，以晋黍9号为材料，基肥、拔节肥和开花肥以不同比例施用，共设6个处理（N0，N1，N2，N3，N4，N5）。结果表明：分次施肥较一次性施肥有利于糜子产量的增加，以N4（2：4：4）的产量最大，为4 575.62 kg/hm2；产量与单株粒重和株高达到极显著正相关，分别为0.93和0.94；氮素养分利用效率、氮肥农学利用率和氮肥偏生产力都以N4处理最大，氮素养分利用效率较N1（基肥100%）和N2（基肥50%、拔节肥50%）分别提高了19.70%和1.31%；氮肥农学利用率较N1和N2分别提高了25.55%和23.64%；氮肥偏生产力较N1和N2分别提高了8.72%和8.07%。所以基肥、拔节期、开花期按2：4：4施氮，可以有效地提高糜子产量和氮素利用效率。 |
| 关键词: 施氮时期 糜子 产量 氮素利用效率 |
| DOI：10.11841/j.issn.1007-4333.2017.12.03 |
| 投稿时间：2016-12-26 |
| 基金项目:山西省农业科学院攻关项目（YGG1625）；农业部国家谷子高粱产业技术体系项目（CARS-06-13S） |
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| Effects of nitrogen application stage on the yield and nitrogen use efficiency of broomcorn millet |
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WANG Junjie1, CHAO Xiaoning1, WANG Haigang1, CHEN Ling1, LIU Sichen1, TIAN Xiang1, QIN Huibin1, YANG Guangzong2, QIAO Zhijun1
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| (1.Institute of Crop Germplasm Resources/Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture/Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China;2.Office Department of Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China) |
| Abstract: |
| Rational nitrogen use plays an important role in increasing the yield and nitrogen (N) efficiency of maize.Through the study of different proportion of nitrogen application rates for base fertilizer at jointing stage and anthesis stage could help managing N fertilizer application and improving N use efficiency.Taking Jinshu 9 as the studied material,base fertilizer,jointing stage fertilizer and anthesis stage fertilizer were applied in different proportions,with 6 treatments.The results showed that multiple nitrogen application was more beneficial to the yield increasing of millet than single nitrogen application.The yield of N4 (2:4:4) was the highest,which was 4 575.62 kg/hm2.Yield reached a significant positive correlation with grain weight per plant and plant height,the correlation coefficients were respectively 0.93 and 0.94;Nitrogen use efficiency,nitrogen agronomic efficiency and nitrogen partial factor productivity were the highest in N4 treatment,nitrogen use efficiency was 19.70% higher than in N1 (base fertilizer 100%) and N2 (base fertilizer 50%,jointing fertilizer 50%) 1.31%,respectively;Nitrogen agronomic efficiency was 25.55% and 23.64% higher than N1 and N2,respectively;The nitrogen partial factor productivity was 8.72% and 8.07% higher than N1 and N2 respectively.So basal fertilizer (20%),the jointing stage (40%) and the anthesis stage (40%) could effectively improve the yield of broomcorn millet and the nitrogen fertilizer use efficiency. |
| Key words: nitrogen application stages broomcorn millet yield nitrogen use efficiency |
