1.华中农业大学植物科学技术学院,武汉 430070
2.华中农业大学工学院,武汉 430070
3.湖北永祥农机装备有限公司,孝感 432699
樊琦,E-mail:fanqi@webmail.hzau.edu.cn
江洋,E-mail:jiangyang@mail.hzau.edu.cn
收稿:2025-08-25,
纸质出版:2026-03-15
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樊琦,刘银涛,葛金鑫,等.减氮增密对水稻产量及稻米食味品质的影响[J].华中农业大学学报,2026,45(2):70‐79.
FAN Qi,LIU Yintao,GE Jinxin,et al.Effects of reducing nitrogen and increasing planting density on yield and taste quality of rice[J].Journal of Huazhong Agricultural University,2026,45(02):70-79.
樊琦,刘银涛,葛金鑫,等.减氮增密对水稻产量及稻米食味品质的影响[J].华中农业大学学报,2026,45(2):70‐79. DOI: 10.13300/j.cnki.hnlkxb.2026.02.008.
FAN Qi,LIU Yintao,GE Jinxin,et al.Effects of reducing nitrogen and increasing planting density on yield and taste quality of rice[J].Journal of Huazhong Agricultural University,2026,45(02):70-79. DOI: 10.13300/j.cnki.hnlkxb.2026.02.008.
为探究氮肥管理与种植密度互作对水稻产量形成及稻米食味品质的协调效应,以优质稻品种鄂中5号为试验材料,在3个种植密度(D1:3.7×10
5
蔸/hm
2
,D2:3.0×10
5
蔸/hm
2
,D3:2.6×10
5
蔸/hm
2
)条件下,分别设置8种氮肥管理处理模式,各处理的施氮量及基肥、分蘖肥、穗肥比例如下:T1(0 kg/hm
2
)、T2(50 kg/hm
2
,7∶3∶ 0)、T3(50 kg/hm
2
,5∶3∶2)、T4(100 kg/hm
2
,7∶3∶0)、T5(100 kg/hm
2
,5∶3∶2)、T6(100 kg/hm
2
,4∶2∶4)、T7(200 kg/hm
2
,7∶3∶0)、T8(200 kg/hm
2
,5∶3∶2),通过2 a田间试验,研究减氮增密栽培对水稻群体质量、产量及食味品质的影响。结果显示,群体质量方面,减氮(T4D3)会降低高效叶面积指数和冠层辐射截获率,但通过增密(T4D1)可优化群体结构,缓解减氮对光能资源利用的负面影响;产量方面,减氮导致穗粒数下降,但增密通过提高有效穗数(增幅为9.14%~16.65%),有效补偿了减氮造成的产量损失,实现产量稳定,其中T4D1的有效穗数较T4D2显著增加15.70%,产量增加19.72%;食味品质方面,通过减氮增密并降低后期穗肥占比,可协同降低籽粒蛋白质含量,显著提升稻米食味值(增幅为13.39%~14.33%)。结果表明,减氮增密同时降低后期穗肥占比(20%以内),可实现水稻产量与食味品质的协同提升。
The elite rice variety Ezhong 5 was used to study the coordinated effects of nitrogen fertilizer and planting density on the yield formation and taste quality of rice.8 treatments of nitrogen fertilizer consisted of the nitrogen application level and the ratio of fertilizer for base,tiller,and spikes including T1
(0 kg/hm
2
),T2 (50 kg/hm
2
,7∶3∶0),T3 (50 kg/hm
2
,5∶3∶2),T4 (100 kg/hm
2
,7∶3∶0),T5 (100 kg/hm
2
,5∶3∶2),T6 (100 kg/hm
2
,4∶2∶4),T7 (200 kg/hm
2
,7∶3∶0),T8 (200 kg/hm
2
,5∶3∶2) were set up under 3 densities including D1(3.7×10
5
holes/hm
2
),D2 (3.0×10
5
holes/hm
2
),and D3(2.6×10
5
holes/hm
2
).A 2-year field experiment was conducted to study the effects of reducing nitrogen and increasing planting density on the population quality,yield and taste quality of rice.The results showed that T4D3 reduced the high-efficiency leaf area index and canopy radiation interception rate and T4D1 optimized the population structure to alleviate the negative effect of reducing nitrogen on the utilization of light energy resources in terms of population quality.Reducing nitrogen decreased the number of grains per spike,but increasing planting density effectively compensated for the yield loss caused by reducing nitrogen via increasing the number of effective spikes (with an increase of 9.14%-16.65%) to achieve stable yield in terms of yield.The number of effective spikes of T4D1 was significantly increased by 15.70% compared with that of T4D2,with an increase in yield of 19.72%.In terms of taste quality,the content of protein in grain was synergistically reduced by reducing nitrogen,increasing planting density,and reducing the proportion of fertilizer for spikes at the late stage of growth and development.The taste value of rice was significantly improved,with an increase ranging from 13.39% to 14.33%.It is indicated that reducing nitrogen and increasing planting density,while reducing the proportion of fertilizer for spikes at the late stage of growth and development(less than 20%) can synergistically improve the yield and taste quality of elite rice.
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