| 氮密互作对玉米辽单575产量和氮素积累的影响 |
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| 引用本文： | 隋阳辉,王延波,徐亮,肖万欣,赵海岩,张洋,徐正进.氮密互作对玉米辽单575产量和氮素积累的影响[J].玉米科学,2021,29(2):140-148. |
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| 作者姓名： | 隋阳辉 王延波 徐亮 肖万欣 赵海岩 张洋 徐正进 |
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| 作者单位： | 辽宁省农业科学院玉米研究所, 沈阳 110161;沈阳农业大学农学院, 沈阳 110866 |
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| 基金项目： | 国家重点研发计划（2016YFD0101203，2017YFD0300700）、中国博士后科学基金资助项目（2017M611255） |
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| 摘 要： | 以国审玉米新品种辽单575为供试材料,采用随机试验设计,设3个种植密度:6.0万株/hm~2(D_(6.00))、6.75万株/hm~2(D_(6.75))和7.5万株/hm~2(D_(7.50)),3个施氮量:135(N_(135))、180(N_(180))和225 kg/hm~2(N_(225)),研究氮密互作对辽西地区春玉米地上部干物质积累、氮素积累及子粒产量的影响。结果表明,与D_(6.00)处理相比,D_(6.75)、D_(7.50)处理下玉米群体干物质积累量显著升高,2017年提高14.9%、17.6%,2018年提高0.4%、11.3%。与N_(135)处理相比,N_(180)、N_(225)处理的氮素积累量较高,分别提高0.2%、0.9%(2017年)和9.3%、8.1%(2018年)。两年间玉米子粒最高产量均在D_(6.75)和N_(225)处理下获得。2017年D_(6.75)N_(225)处理和2018年D_(6.75)N_(180)、D_(6.75)N_(225)处理的玉米产量显著高于其他处理,密度和氮肥的互作效应对玉米产量的影响显著,说明适量增密减氮是协同提高玉米产量的重要途径。两年间收获指数、氮收获指数和氮肥偏生产力最高值均在D_(6.75)处理下获得。辽单575适宜的种植密度从常规的密度增加到6.75万株/hm~2,施氮量第一年为225 kg/hm~2,第二年减少为180 kg/hm~2,可实现减氮增密增产的目标。
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| 关 键 词： | 玉米 增密减氮 互作 干物质积累 产量 |
| 收稿时间： | 2020/5/15 0:00:00 |
Effect of Nitrogen and Density Interaction on Yield and Nitrogen Accumulation of Liaodan575 |
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| SUI Yang-hui,WANG Yan-bo,XU Liang,XIAO Wan-xin,ZHAO Hai-yan,ZHANG Yang,XU Zheng-jin.Effect of Nitrogen and Density Interaction on Yield and Nitrogen Accumulation of Liaodan575[J].Journal of Maize Sciences,2021,29(2):140-148. |
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| Authors: | SUI Yang-hui WANG Yan-bo XU Liang XIAO Wan-xin ZHAO Hai-yan ZHANG Yang XU Zheng-jin |
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| Institution: | Corn Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang 110161; Agronomy College, Shenyang Agricultural University, Shenyang 110866, China |
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| Abstract: | A new maize hybrids released in China, Liaodan575, was used as experimental materials. Three plant densities(60 thousand, 67.5 thousand and 75 thousand plants per hectare) and three nitrogen rates(135, 180 and 225 kg/ha) were designed by random experiment in 2017 and 2018. The results showed that compared with D6.00, D6.75 and D7.50 dry matter accumulation of maize significantly increased by 14.9% and 17.6% in 2017, 0.4% and 11.3% in 2018. Compared with N135, N180 and N225 nitrogen accumulation were higher, increased by 0.2% and 0.9%(in 2017), 9.3% and 8.1%(in 2018), respectively. During the 2017 and 2018, the highest maize yield was obtained under the treatment of D6.75 and N225. The maize yield of D6.75N225 in 2017 as well as D6.75N180 and D6.75N225 in 2018 was significantly higher than that of other treatments, and the interaction effect of planting density and nitrogen application amount significantly affected maize yield, indicated that increased plant density with reduced N rate properly was an important way to synergistic improve maize yield. The highest harvest index, nitrogen harvest index and nitrogen partial productivity were obtained under D6.75 treatment in 2017 and 2018. Therefore, it is recommended for Liaodan575 that suitable planting density should be increased from the conventional density to 67.5 thousand plants per hectare, and the amount of nitrogen application should be 225 kg/ha in the first year, and then to 180 kg/ha in the next year. It can achieve the goals of reducing nitrogen, increasing density and increasing maize yield. |
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| Keywords: | Maize Increased density and reduced N rate Interaction Dry matter accumulation Yield |
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