作物研究2025，Vol.39Issue(5)：396-405,10.
垄厢模式下水肥运筹对双季稻光合特性、产量与氮素利用的影响
Effects of Water and Fertilizer Management on Photosynthetic Characteristics,Yield,and Nitrogen Utilization of Double-Season Rice under Ridge-Furrow Cultivation
摘要
Abstract
The study aimed to investigate the effects of water and fertilizer management on photosynthetic characteristics,yield,and nitrogen use efficiency in double-cropping rice under ridge-furrow cultivation.Using Zhuliangyou 819(early rice)and Taiyou 390(late rice)as test materials,a field experiment on water and fertilizer regulation was conducted from March to October in 2024 in Meihua Village,Hengyang City,Hunan Province.A split-plot design was adopted,with the main plots consisting of two water management methods,which were conventional irrigation(C)and water-saving irrigation(J),and the subplots comprising four nitrogen levels which were 0(N0),120(N1),150(N2),and 180(N3)kg/hm2).The results showed that the leaf area index(LAI)of the JN3 treatment was significantly higher than that of other treatments at various growth stages of both early and late rice.LAI exhibited a highly significant positive correlation with yield.The JN3 treatment significantly increased rice yield by enhancing the number of effective panicles and grains per panicle,with yields of early and late rice increasing by 73.47%and 49.80%,respectively,compared to the CN0 treatment.The total nitrogen accumulation across both seasons was highest in the JN3 treatment,showing increases of 1.24 and 1.26 times compared to the CN0 treatment.The nitrogen partial factor productivity was highest in the JN1 treatment for both seasons,increasing by 39.62%and 42.44%,respectively,compared to the CN3 treatment.For early rice,the nitrogen agronomic efficiency was highest in the CN1 treatment,which was 22.31%higher than that of the CN3 treatment,while for late rice,it was highest in the JN3 treatment,with a 15.55%increase over the CN3 treatment.The nitrogen uptake efficiency was highest in the JN3 treatment for both seasons,increasing by 10.42%and 17.82%,respectively,compared to the CN1 treatment.In conclusion,the optimal treatment combination in this experiment was JN3,water-saving irrigation with a nitrogen application rate of 180 kg/hm2,which improved the photosynthetic characteristics of rice and effectively enhanced both yield and nitrogen use efficiency.关键词
水稻/垄厢栽培/灌溉/施肥/光合特性/产量/氮素利用效率Key words
rice/ridge-furrow cultivation/irrigation/nigtrogen fertilization/photosynthetic characteristics/yield/nitrogen use efficiency分类
农业科技引用本文复制引用
彭美丹,滕容,龙攀,郑华斌,徐莹,傅志强..垄厢模式下水肥运筹对双季稻光合特性、产量与氮素利用的影响[J].作物研究,2025,39(5):396-405,10.基金项目
国家重点研发计划项目(2022YFD2300305). （2022YFD2300305）
