| 减氮增施腐殖酸液肥对夏玉米产量和氮肥利用率的影响 |
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| 引用本文： | 秦文,韩燕来,张毅博,乔丹丹,李宁宁,赵家俊,邹旭瑞,李慧.减氮增施腐殖酸液肥对夏玉米产量和氮肥利用率的影响[J].河南农业科学,2017,46(4). |
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| 作者姓名： | 秦文 韩燕来 张毅博 乔丹丹 李宁宁 赵家俊 邹旭瑞 李慧 |
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| 作者单位： | 河南农业大学资源与环境学院,河南郑州,450002 |
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| 基金项目： | 中科院科技服务网络计划(STS)项目，河南省高等学校重点科研项目，河南省科技攻关项目 |
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| 摘 要： | 为了在保证夏玉米获得较高产量基础上尽量减少氮肥施用量,确定腐殖酸液肥与氮肥的合理配施比例,设置不施氮肥(CK)、正常施氮量(纯N,下同)210 kg/hm~2(100%N)、减施20%氮肥即施N 168 kg/hm~2(80%N)、减施20%氮肥即施N 168 kg/hm~2+腐殖酸液肥1.7 L/hm~2(80%N+WF)、减施40%氮肥即施N 126 kg/hm~2(60%N)、减施40%氮肥即施N 126 kg/hm~2+腐殖酸液肥1.7 L/hm~2(60%N+WF)6个处理,研究减氮增施腐殖酸液肥对夏玉米产量和氮肥利用率的影响。结果表明,与100%N处理相比,80%N+WF处理土壤有机质含量、碱解氮含量、pH值、氮肥回收效率、氮肥生理效率均无显著变化,而氮肥农学效率显著提高9.8%,最终使夏玉米穗粒数、百粒质量及产量与100%N处理接近;但进一步减少氮肥施用量增施腐殖酸液肥(60%N+WF)处理会降低土壤碱解氮和有机质含量,差异均不显著,但较80%N+WF处理降幅增大,虽然也能提高氮肥农学效率和氮肥回收效率,但最终较100%N处理显著降低夏玉米穗粒数(2.7%)和产量(5.2%)。综上,80%N+WF处理在减施氮42 kg/hm~2的情况下能达到100%N处理的效果,土壤肥力较高,氮肥农学效率和氮肥回收效率提高,且穗粒数和产量较高。
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| 关 键 词： | 腐殖酸液肥 夏玉米 产量 氮肥利用率 |
Effects of Reducing Nitrogen Fertilizer and Increasing Humic Acid Liquid Fertilizer on Yield and Nitrogen Use Efficiency of Summer Maize |
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| QIN Wen,HAN Yanlai,ZHANG Yibo,QIAO Dandan,LI Ningning,ZHAO Jiajun,ZOU Xurui,LI Hui.Effects of Reducing Nitrogen Fertilizer and Increasing Humic Acid Liquid Fertilizer on Yield and Nitrogen Use Efficiency of Summer Maize[J].Journal of Henan Agricultural Sciences,2017,46(4). |
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| Authors: | QIN Wen HAN Yanlai ZHANG Yibo QIAO Dandan LI Ningning ZHAO Jiajun ZOU Xurui LI Hui |
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| Abstract: | In order to minimize the amount of nitrogen fertilizer under the premise of ensuring a higher yield of summer maize,and determine the reasonable proportion of humic acid liquid fertilizer and nitrogen fertilizer,the field experiments were carried out with 6 treatments:no fertilizer(CK),the normal application amount of nitrogen (210 kg/ha,100 ％ N),reducing 20％ application amount of nitrogen fertilizer (168 kg/ha,80％ N),reducing 20％ application amount of nitrogen (168 kg/ha) with humic acid liquid fertilizer 1.7 L/hm2 (80％ N + WF),reducing 40％ nitrogen application amount(126 kg/ha,60％N),reducing 40％ nitrogen application amount(126 kg/ha) with humic acid liquid fertilizer 1.7 L/ha (60％ N + WF),and the effects of reducing nitrogen fertilizer and increasing humic acid liquid fertilizer on yield and nitrogen use efficiency of summer maize were studied.The results showed that compared with 100％ N treatment,there was no significant change in soil organic matter,alkali-hydrolyzable N contents,pH value,nitrogen recovery efficiency and nitrogen fertilizer physiological efficiency;while the agronomic efficiency of nitrogen fertilizer was significantly increased by 9.8％,which eventually caused the result that the grain number per spike,grain weight and yield of summer maize were close to 100％ N treatment.However,further reducing the amount of nitrogen fertilizer and increasing the amount of humic acid liquid fertilizer (60％ N + WF)would reduce soil alkaline nitrogen and organic matter contents with no significant difference,but the descent scope was bigger than that of 80％ N + WF treatment;although the agronomic efficiency of nitrogen fertilizer and the recovery efficiency of nitrogen fertilizer of 60％ N + WF treatment could also improved,the grain number per spike and the yield of summer maize significantly decreased by 2.7％ and 5.2％ compared with 100％ N treatment.In conclusion,80％ N + WF treatment could achieve the effect of 100％ N treatment under the condition of reducing N application by 42 kg/ha,and obtain higher soil fertility,agronomic efficiency and recovery efficiency of nitrogen fertilizer,grain number per spike and yield. |
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| Keywords: | humic acid liquid fertilizer summer maize yield nitrogen use efficiency |
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