农学学报2025，Vol.15Issue(3)：93-100,8.
不同播期下旱地春小麦产量及生物量应对氮肥和CO2浓度升高的响应模拟
Simulation of Response of Spring Wheat Yield and Biomass to Increasing Nitrogen Fertilizer and CO2 Concentration in Dryland Under Different Sowing Dates
摘要
Abstract
This study explores the changes in nitrogen application rate and the effects of increased CO2 concentration on wheat yield and biomass in semi-arid areas under different sowing dates.This article used the adjusted APSIM model to set up three different sowing dates of early sowing ESW(March 3rd),normal sowing NSW(March 19th),and late sowing LSW(March 31st),five nitrogen application treatments of N1(0 kg/hm2),N2(52.5 kg/hm2),N3(105 kg/hm2),N4(157.5 kg/hm2),and N5(210 kg/hm2),and five CO2 concentrations of C1(370 ppm),C2(420 ppm),C3(470 ppm),C4(520 ppm),and C5(570 ppm)for simulation experiments.The results indicated that the APSIM model had good applicability in the experimental area;both nitrogen application rate and CO2 concentration had an impact on the yield and biomass of dryland spring wheat,and the effects varied under different sowing dates.As the sowing date was delayed,both nitrogen application rate and CO2 concentration had a positive effect on wheat yield and biomass,with nitrogen application rate having a much greater impact than CO2 concentration;under specific nitrogen application rates and CO2 concentrations,the choice of sowing date had a significant impact on yield and biomass.Higher yields were typically achieved during normal sowing periods,while late sowing was beneficial for biomass accumulation.When climate and soil conditions change,adjusting the sowing date can optimize wheat production.When the nitrogen application rate was N4 and the CO2 concentration was C1,the wheat yield was highest under normal sowing,and the wheat biomass was highest under late sowing.This study holds significant importance in guiding wheat production in semi-arid regions.In practical production,based on local climate and soil conditions,parameters such as sowing dates,nitrogen application rates,and CO2 concentrations can be adjusted to optimize wheat production and enhance both yield and biomass.Especially in the context of global climate change and the numerous challenges faced by agricultural production,this research provides robust support for the sustainable development of wheat production in semi-arid areas.关键词
小麦/APSIM模型/播期/施氮量/CO2浓度/产量/生物量/半干旱地区Key words
wheat/APSIM model/sowing date/nitrogen application rate/CO2 concentration/yield/biomass/semi-arid region分类
农业科技引用本文复制引用
杨婷婷,刘强,马晓艺..不同播期下旱地春小麦产量及生物量应对氮肥和CO2浓度升高的响应模拟[J].农学学报,2025,15(3):93-100,8.基金项目
国家自然科学基金项目"旱作麦田土壤N2O排放对耕作措施及水氮管理的响应模拟"(32360438) （32360438）
甘肃省科技计划项目"旱作小麦增产和N2O减排的耕作措施及氮肥管理调控技术与应用"(22YF7FA116). （22YF7FA116）
