塔里木大学学报2025，Vol.37Issue(1)：59-66,8.DOI:10.3969/j.issn.1009-0568.2025.01.007
施氮量对枣苜间作系统苜蓿产量及土壤碳排放量的影响
Effects of nitrogen fertilization rate on alfalfa yield and soil carbon emissions in jujube-alfalfa intrcropping system
摘要
Abstract
In this study,the effects of different nitrogen fertilization rates on soil carbon emissions,hydrothermal conditions and al-falfa yield in jujube alfalfa intercropping were studied to determine the nitrogen fertilizer application rate with high yield and low carbon.Field experiments were conducted to study the effects of different nitrogen fertilizer dosages[0 kg·hm-2(N0),80 kg·hm-2(N1),160 kg·hm-2(N2)and 240 kg·hm-2(N3)]on soil CO2 emissions,soil temperature,soil moisture,alfalfa yield and dry mat-ter changes in intercropping jujube alfalfa,and principal component analysis was carried out.The results showed that the CO2 emis-sion of intercropping alfalfa was the highest in N3(240 kg·hm-2)treatment,and the lowest in N0(0 kg·hm-2)treatment,and the CO2 emission increased with the increase of nitrogen application rate.The soil temperature of different nitrogen fertilizer rates in-creased first and then decreased with time,and the soil temperature was mainly affected by seasonal changes.With the increase of ni-trogen fertilizer application,the soil water content first increased and then decreased,and the soil water content of intercropping al-falfa treated with N2(160 kg·hm-2)was the highest.N2 treatment could significantly increase the yield,dry matter weight and dry-fresh ratio of alfalfa.The increase of nitrogen application rate significantly increased the carbon emission of soil,and the appropriate nitrogen use rate(N2)was beneficial to improve the soil water content and alfalfa yield of jujube alfalfa intercropping system.Therefore,from the perspective of environmental protection and high yield demand,the nitrogen fertilizer application rate of N2 treatment is more conducive to reducing soil carbon emissions and increasing alfalfa yield in intercropping.关键词
施氮量/间作系统/苜蓿/土壤碳排放/产量Key words
nitrogen application rate/intercropping system/alfalfa/soil carbon emission/yield分类
园艺学与植物营养学引用本文复制引用
张淑婷,王进斌,李田甜,庞林斌,赵雅茹,陈国栋..施氮量对枣苜间作系统苜蓿产量及土壤碳排放量的影响[J].塔里木大学学报,2025,37(1):59-66,8.基金项目
国家重点研发计划项目(2016FYC0501407) （2016FYC0501407）
塔里木大学大学生创新创业训练计划项目(2023017) （2023017）
