农业机械学报2024，Vol.55Issue(3)：340-351,12.DOI:10.6041/j.issn.1000-1298.2024.03.034
减施氮肥和接种根瘤菌对大豆生理生长与氮素利用效率及产量的影响
Effects of Nitrogen Fertilizer Reduction and Rhizobia Inoculation on Physiological Growth,Nitrogen Use Efficiency and Yield of Soybean
摘要
Abstract
In agricultural production within arid and semi-arid regions,common practices involve rhizobium bacteria inoculation and nitrogen application to promote soybean growth and increase seed yields.However,there has been limited research on the interaction between rhizobium inoculation and nitrogen application and their impact on soybean growth and yield.This two-year field experiment aimed to address this gap by investigating four nitrogen application levels(N0:0 kg/hm2,N1:60 kg/hm2,N2:120 kg/hm2,N3:180kg/hm2)and two inoculation levels:rhizobium inoculation(R)and water mixed with no inoculation(unmarked).Various parameters related to soybean growth,including nodule number,nodule dry weight,leaf area index(LAI),biomass accumulation and root characteristics,were measured at different growth stages.Additionally,physiological indicators such as chlorophyll content,photosynthetic parameters,fluorescence parameters and nitrogen uptake,along with nitrogen use efficiency calculations were assessed.The results demonstrated that soybean growth reached its optimum under the RN2 treatment,with maximum nodule number of 241.47,maximum nodule dry weight of 1.30g,maximum root length density of 15.00 cm/cm3,maximum LAI of 5.44 cm2/cm2,maximum biomass accumulation of 17 530.51 kg/hm2,maximum chlorophyll content of 53.55,maximum net photosynthesis rate of 32.75 µmol/(m2·s),and maximum seed yield of 4 659.4 kg/hm2.In conclusion,reducing nitrogen fertilizer application(N2)while concurrently inoculating with rhizobium(R)was essential for enhancing the physiological growth of soybeans in the Guanzhong Plain,improving nitrogen use efficiency and increasing soybean yields.The research result can provide both theoretical underpinning and practical experience to elevate soybean production in arid and semi-arid regions.关键词
大豆/施氮/接种根瘤菌/氮肥利用效率/产量Key words
soybean/nitrogen application/inoculation of rhizobium/nitrogen use efficiency/yield分类
农业科技引用本文复制引用
向友珍,张威,唐子竣,付骏宇,李志军,张富仓..减施氮肥和接种根瘤菌对大豆生理生长与氮素利用效率及产量的影响[J].农业机械学报,2024,55(3):340-351,12.基金项目
国家自然科学基金项目(52179045)和大学生创新性实验项目(S202210712619) （52179045）
