作物学报2024，Vol.50Issue(8)：2025-2038,14.DOI:10.3724/SP.J.1006.2024.32061
滴灌条件下施氮量对不同氮效率水稻品种物质积累及养分吸收的影响
Effects of nitrogen fertilization levels on matter accumulation and nutrient up-take in rice cultivar with different nitrogen efficiency under drip irrigation
摘要
Abstract
The objective of this study is to explore the effects of nitrogen application levels on dry matter accumulation,nitrogen absorption and transport,and yield of rice varieties with different nitrogen efficiency during key growth stages under drip irriga-tion conditions,which can provide the technical reference for high-yield and efficient rice production under drip irrigation in arid and semi-arid areas.The experiment was conducted from 2021 to 2022,using high nitrogen efficient cultivar(T-43)and low ni-trogen efficient cultivar(LX-3)as the test materials.The split zone design was conducted with four nitrogen application levels,namely N0(0 kg hm-2),N1(150 kg hm-2),N2(300 kg hm-2),and N3(450 kg hm-2).The differences in dry matter accumulation,nitrogen absorption and utilization,and yield response to nitrogen application in drip irrigated rice at heading and maturity stages were analyzed.The results showed as follows:(1)Applying nitrogen fertilizer can increase the dry matter accumulation(1.99%-26.02%)and nitrogen accumulation(25.67%-97.69%)of rice under drip irrigation,and increase rice yield(23.75%-66.75%).However,the excessive nitrogen application(450 kg hm-2)reduced the promoting effect on dry matter accu-mulation,leading to a decrease in seed setting rate and grain number per spike,mainly concentrating nitrogen in straw,ultimately reducing the nitrogen utilization efficiency of rice.(2)Under the same nitrogen application conditions,the effective number of panicles,seed setting rate,dry matter and nitrogen accumulation in leaves and panicles of T-43 were higher than LX-3 by 1.65%-5.19%,0.42%-8.47%,7.61%-19.68%,19.81%-40.73%,19.81%-30.23%,and 20.14%-49.65%,respectively,and the final yield was higher than LX-3 by 4.23%-28.47%.(3)The response of nitrogen utilization efficiency varies among varieties at P<0.05.Compared with LX-3,T-43 had higher N Agronomic efficiency,N recovery efficiency,and N partial factor productivity higher by 1.05%-25.23%,5.86%-20.05%,and 10.09%-18.01%,respectively.In conclusion,under drip irrigation cultivation,the selection of high nitrogen efficient cultivar(T-43)and the application of 300 kg hm-2 nitrogen showed better nitrogen uptake and transport capacity and higher yield,and could better utilize nutrient resources,which was the best combination of variety and ni-trogen application rate in this experiment.关键词
滴灌水稻/氮效率品种/干物质积累/氮素积累/氮素利用Key words
drip irrigation of rice/cultivar with high nitrogen efficiency/dry matter accumulation/nitrogen accumulation/nitro-gen utilization引用本文复制引用
宋志文,赵蕾,毕俊国,唐清芸,王国栋,李玉祥..滴灌条件下施氮量对不同氮效率水稻品种物质积累及养分吸收的影响[J].作物学报,2024,50(8):2025-2038,14.基金项目
本研究由国家自然科学基金项目(32360527,31460541),第三师图木舒克市科技计划项目(KJ2023CG03),石河子大学青年创新拔尖人才项目(CXBJ202003)和石河子大学自主支持科研项目(ZZZC2022008)资助.This study was supported by the National Natural Science Foundation of China(32360527,31460541),the Science and Technology Plan Project of Tumushuke City,the Third Division(KJ2023CG03),the Young Innovative Top Talents Project of Shihezi University(CXBJ202003),and the Independent Support Scientific Research Project of Shihezi University(ZZZC2022008). （32360527,31460541）
