农业资源与环境学报2026，Vol.43Issue(5)：1189-1199,11.DOI:10.13254/j.jare.2025.0162
氮肥减量配施腐植酸对北疆灌区土壤有机碳组分、酶活性及玉米产量的影响
Effects of nitrogen fertilizer reduction with humic acid application on soil organic carbon fraction,enzyme activities and maize yield in northern Xinjiang irrigation areas
摘要
Abstract
This study investigates the effects of nitrogen fertilizer reduction with humic acid on soil organic carbon fractions,enzyme activities and maize yield.It aims to provide a scientific basis for the efficient use of fertilizers and the improvement of crop yield under the maize planting pattern in the northern Xinjiang irrigation area.A large field trial was used and twelve treatments were set up:no nitrogen fertilizer(N0HA0,0 kg·hm-2),conventional nitrogen fertilizer(N1HA0,300 kg·hm-2),15%nitrogen fertilizer reduction(N2HA0,255 kg·hm-2),30%nitrogen fertilizer reduction(N3HA0,210 kg·hm-2),low humic acid(N0HA1,45 kg·hm-2),high humic acid(N0HA2,90 kg·hm-2),conventional nitrogen fertilizer combined with low humic acid(N1HA1),conventional nitrogen fertilizer combined with high humic acid(N1HA2),nitrogen fertilizer reduction of 15%combined with low humic acid(N2HA1),nitrogen fertilizer reduction of 15%combined with high humic acid(N2HA2),nitrogen fertilizer reduction of 30%combined with low humic acid(N3HA1)and nitrogen fertilizer reduction of 30%combined with high humic acid(N3HA2).The study analyzed the changes of soil organic carbon fractions,enzyme activities and maize yield of different fertilizer treatments in different layers of maize at the maturity stage.The results showed that:compared with N1HA0,only the N3HA2 treatment significantly increased the organic carbon content in the 0-10 cm and 10-20 cm soil layers by 13.01%and 17.18%,respectively.In contrast,nitrogen fertilizer reduction with humic acid significantly increased the active organic carbon content and carbon pool management index in the 0-10,10-20 cm(except N2HA2)and 20-40 cm(except N3HA2)soil layers(P<0.05).Compared with N1HA0,the N2HA2 and N3HA1 treatments significantly increased the activities of sucrase and urease in the 0-10 cm and 10-20 cm soil layers,as well as the activities of catalase and urease in the 20-40 cm soil layers.Under the N3HA2 treatment,the activities of catalase and sucrase in the 0-10 cm and 20-40 cm soil layers were significantly increased;meanwhile the sucrase activity in the 0-10 and 10-20 cm soil layers was significantly increased.Additionally,the urease activity in 0-10 cm and 10-20 cm soil layers under N2HA1 treatment significantly increased(P<0.05).Compared with N1HA0,nitrogen fertilizer reduction of 15%combined with humic acid significantly increased maize yield.Among these treatments,the N2HA1 treatment resulted in higher kernel number per spike and maize yield,with a yield increase rate of 10.02%.Structural equation modeling analysis revealed that nitrogen fertilizers combined with humic acid could improve maize yield by increasing soil enzyme activities,active organic carbon content and enhancing soil carbon pool management index.In conclusion,the reduction of nitrogen fertilizer combined with humic acid significantly affect soil organic carbon fractions and enzyme activities,which in turn affected corn yield.Among these treatments,combined performance of 15%reduction of nitrogen fertilizer with low humic acid shows the optimal effect in enhancing soil carbon sequestration potential and maize yield in farmland,and is therefore recommended as the best fertilization mode for the optimized application of nitrogen fertilizer combined with humic acid in drip-irrigated maize fields.关键词
氮肥/腐植酸/有机碳组分/土壤酶/玉米/产量Key words
nitrogen fertilizer/humic acid/organic carbon fraction/soil enzyme/corn/yield引用本文复制引用
卢小倩,付超,陈金露,王单丽,郭青云,赵红梅..氮肥减量配施腐植酸对北疆灌区土壤有机碳组分、酶活性及玉米产量的影响[J].农业资源与环境学报,2026,43(5):1189-1199,11.基金项目
自治区"三农"骨干人才培养项目(2024SNGGGCC020) （2024SNGGGCC020）
新疆土壤与植物生态过程重点实验室项目(23XJTRZW10) （23XJTRZW10）
自治区天山英才—青年拔尖人才项目(2023TSYCCX0085) （2023TSYCCX0085）
