利用小麦间作蚕豆体系作物生长动态数据和Logistic生长曲线，为小麦和蚕豆单作与间作体系下作物间相互作用提供科学依据。对不同氮水平下小麦、蚕豆单作和间作体系的生物量动态变化规律模拟分析，结果表明，间作处理因作物间的竞争生长速率比均呈竞争恢复的抛物线趋势，2种施肥处理的单作蚕豆均早于间作蚕豆达到最大生长速率，小麦成熟后对蚕豆的竞争减小，蚕豆的生长速率增强；相同种植模式下施氮处理对蚕豆的生物量累积起关键作用，间作和氮缺乏的环境下，能激发蚕豆的生物固氮效应，促进蚕豆地下部生长和根瘤数量增多。综上所述，施氮和间作改变了小麦、蚕豆生物量的积累，在小麦间作蚕豆生长前期，小麦有较强的氮肥利用优势，进而对蚕豆的地上部和地下部生物量累积产生影响，反映了作物的生长潜力及对养分资源的利用能力。

By utilizing dynamic growth data of crops in the wheat/faba bean intercropping system and Logistic growth curves, this study provides scientific evidence for the interactions between wheat and faba bean in monoculture and intercropping systems. The dynamic changes in biomass under different nitrogen levels were simulated and analyzed for wheat and faba bean in monoculture and intercropping systems. Results indicated that in intercropping treatments, the competitive accumulation rate ratio between crops exhibited a parabolic trend of competitive recovery. Under both fertilization treatments, monoculture faba bean reached its maximum growth rate earlier than intercropped faba bean. After wheat maturity, the competition from wheat decreased, allowing the growth rate of faba bean to recover. Under the same planting pattern, nitrogen application played a critical role in biomass accumulation of faba bean. In intercropping and nitrogen-deficient environments, the biological nitrogen fixation effect of faba bean was stimulated, promoting below-ground growth and increasing the number of nodules. In summary, nitrogen application and intercropping altered the biomass accumulation of wheat and faba bean. During the early growth stage of faba bean in the wheat intercropping system, wheat showed a strong advantage in nitrogen utilization, which affected the above-ground and below-ground biomass accumulation of faba bean. This reflects the growth potential of the crops and their capacity to utilize nutrient resources.

S512.1；S643.6

国家重点研发计划(2022YFD1900200)。