寒旱农业科学2025，Vol.4Issue(1)：39-46,8.DOI:10.3969/j.issn.2097-2172.2025.01.007
膜下微喷灌条件下水氮耦合对制种玉米产量及水肥效应的影响
Coupling Effects of Water and Nitrogen on Seed Maize Yield and Water-nitrogen Use Efficiency under Mulched Micro-sprinkling Irrigation
摘要
Abstract
In order to determine the response of water and fertilizer coupling on the yield of seed maize under mulched micro-sprinkling irrigation,and to achieve high yield of seed maize and efficient utilization of water and nitrogen resources,a located field trial were examined on the coupling of water and nitrogen under mulched micro-sprinkling irrigation at Zhangye Water-saving Agricultural Station of Gansu Academy of Agricultural Sciences in 2022.The experiment adopted a two-factor split plot design,the two factors were the water factor(2 700,3 600 and 4 500 m3/ha)and nitrogen factor(0,120,240 and 360 kg/ha),respectively,and analyzed the influence of different irrigation and nitrogen levels on the yield and the water-nitrogen use efficiency under the mulched micro-sprinkling irrigation.Results showed thatunder mulched micro-sprinkling irrigation,increasing the amount of irrigation and nitrogen application could effectively increase the grain yield of seed maize,but the boosting effects were weakened when the amount of water and nitrogen application reached a certain level.Under different irrigation amounts,the treatment with 240 kg/ha of nitrogen application significantly increased the leaf area index and light interception rate compared to the other nitrogen treatments.The leaf area indexes during the grain-filling stage was 16.69％to 21.12％,1.33％to 2.00％,and-3.79％to 13.73％higher than the 0,120,and 360 kg/ha nitrogen treatments,respectively.Under the conditions of 4 500 m3/ha irrigation amount and 240 kg/ha nitrogen application,the highest maize grain yield was 7.84 t/ha.However,no significant difference was detected compared with the treatment with 3 600 m3/ha irrigation amount and 240 kg/ha nitrogen application(7.80 t/ha),which only showed a 0.5％increase.Moreover,the latter treatment reduced irrigation by 20％,increased water use efficiency by 13.50％,and improved nitrogen agronomic efficiency(NAE)by 60.91％compared to the former.In conclusion,under the conditions of mulched micro-sprinkling irrigation,an irrigation amount of 3 600 m3/ha and a nitrogen application rate of 240 kg/ha is the most suitable water-nitrogen coupling model for seed maize production in the experimental area and the Hexi irrigation district.关键词
制种玉米/水氮耦合/产量/水肥效应/膜下微喷灌Key words
Seed maize/Water-nitrogen coupling/Yield/Water-nitrogen use efficiency/Mulched micro-sprinkling irrigation分类
农业科技引用本文复制引用
连彩云,马忠明,王智琦,薛亮,唐文雪,罗双龙..膜下微喷灌条件下水氮耦合对制种玉米产量及水肥效应的影响[J].寒旱农业科学,2025,4(1):39-46,8.基金项目
甘肃省农业科学院重点研发计划项目(2022GAAS14、2023GAAS17). （2022GAAS14、2023GAAS17）
