作 者：
秦文;韩燕来;张毅博;乔丹丹;李宁宁;赵家俊;邹旭瑞;李慧
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。
译 名：
Effects of Reducing Nitrogen Fertilizer and Increasing Humic Acid Liquid Fertilizer on Yield and Nitrogen Use Efficiency of Summer Maize
作 者：
QIN Wen;HAN Yanlai;ZHANG Yibo;QIAO Dandan;LI Ningning;ZHAO Jiajun;ZOU Xurui;LI Hui;College of Resources and Environment,Henan Agricultural University;
关键词：
humic acid liquid fertilizer;;summer maize;;yield;;nitrogen use efficiency
摘 要：
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/hm~2(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 fertilizeron yield and nitrogen use efficiency of summer maize were studied. The results showed that compared with100% 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 by2. 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.
