施氮量对晚粳稻甬优1538产量、品质及氮素吸收利用的影响
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成臣(1990-),男,博士研究生,主要从事水稻栽培理论与技术研究。E-mail:chengchenzxm@163.com

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国家重点研发计划项目(2016YFD0300501,2017YFD0301605);江西省水稻产业技术体系专项(JXARS-02-03);江西省重点研发计划项目(20161ACF60013,20171BBF60030);江西现代农业科研协同创新专项(JXXTCX2015001-011)


Effects of Nitrogen Application Rates on Japonica Rice Yield, Quality, and Nitrogen Uptake and Utilization During the Late-rice Cropping Seasons in Southern China
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    摘要:

    为明确南方双季稻区晚粳稻氮肥合理施用量,通过2年(2016—2017年)田间试验, 设置了6种不同施氮水平N1(0 kg/hm2)、N2(165 kg/hm2)、N3(210 kg/hm2)、N4(255 kg/hm2)、N5(300 kg/hm2)和N6(345 kg/hm2),研究不同施氮量对南方晚粳稻产量、品质及氮素吸收利用的影响。结果表明:随着施氮量增加,晚粳稻产量呈抛物线的变化趋势;与N4产量相比,N1、N2、N3、N5和N6产量分别降低29.2%~34.9%,10.1%~11.8%,5.5%~5.7%,1.2%~4.4%,2.3%~9.0%,其中N4处理2年产量均显著高于N1和N2处理,而有效穗数和每穗粒数的提高是晚粳稻产量增加的主要原因。随施氮量增加,水稻氮素总积累量增加,水稻氮素的干物质生产效率、生理利用率、偏生产力、农学利用率和收获指数均降低,而氮素吸收利用率先增后降。随施氮量增加,晚粳稻加工品质、外观品质和营养品质均提高,蒸煮与食味品质中直链淀粉含量降低,胶稠度增加;RVA谱特征值中峰值黏度、热浆黏度、冷胶黏度和崩解值均逐渐降低,而消减值和回复值均呈增加的趋势。综上所述,在试验设置条件下,南方晚粳稻施氮量以N4(255 kg/hm2)为宜,其能使水稻高产、优质及高效得到较好的协调统一。

    Abstract:

    In order to clarify the reasonable application amount of nitrogen fertilizer in late japonica rice in the southern double season rice area, an field experiment was conducted in 2016—2017 during the late-rice cropping seasons in southern China, the six nitrogen levels including N1 (0 kg/hm2), N2 (165 kg/hm2), N3 (210 kg/hm2), N4 (255 kg/hm2), N5 (300 kg/hm2) and N6 (345 kg/hm2) were set, and the effects of different nitrogen application rates on the japonica rice yield, quality and nitrogen use efficiency were studied. The results showed that the yield of late japonica rice showed a parabolic trend with the increasing of nitrogen application. Compared with the yield of N4 plots, the grain yield of the N1, N2, N3, N5 and N6 plots decreased by 29.2%~34.9%, 10.1%~11.8%, 5.5%~5.7%, 1.2%~4.4% and 2.3%~9.0%, respectively. The grain yield of the N4 plots was significantly higher than those of the N1 and N2 plots in two years. The main reason for the increase of late japonica rice yield was the increase of productive panicle number and seed setting rate. With the increasing of nitrogen application, the total nitrogen accumulation of rice increased, while the nitrogen dry matter production efficiency, nitrogen physiological efficiency, nitrogen factor productivity for applied nitrogen, nitrogen agronomic efficiency and nitrogen harvest index were all decreased, and the nitrogen uptake and utilization efficiency first increased and then decreased. With the increasing of nitrogen application, the industrial quality, appearance quality and nutrition quality of the late japonica rice were all improved, the content of amylose content in eating and cooking quality decreased and the gel consistency increased. The peak viscosity, hot viscosity, cool viscosity and breakdown of RVA spectrum decreased gradually with the increasing of nitrogen application, while the setback and consistence increased. To sum up, it is advisable to apply nitrogen to N4 (255 kg/hm2) of japonica rice under the experimental conditions during the late-rice cropping seasons in southern China, which can reach the high yield, quality and efficiency.

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成臣, 曾勇军, 王祺, 谭雪明, 商庆银, 曾研华, 石庆华.施氮量对晚粳稻甬优1538产量、品质及氮素吸收利用的影响[J].水土保持学报,2018,32(5):222~228

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  • 收稿日期:2018-03-29
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  • 在线发布日期: 2018-10-16
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