中国农业大学学报2018，Vol.23Issue(3)：1-9,9.DOI:10.11841/j.issn.1007-4333.2018.03.01
施氮量及间作对燕麦、向日葵生产力及土壤硝态氮累积的影响
Effects of nitrogen application rate and intercropping on oat and sunflower productivity and soil nitrate accumulation
摘要
Abstract
In order to investigate the effects of different nitrogen application rates and intercropping on oat,sunflower productivity and nitrate accumulation after oat harvest,a field experiment was conducted in semi-arid regions of western Jilin province with 3 nitrogen application rates (0,50,and 100 kg/hm2).Yield,nitrogen uptake and soil nitrate content were measured.The results showed that:Oat and sunflower strip intercropping had yield advantages and higher N uptake efficiency.Its land equivalent ratio (LER) and N uptake equivalent ratio (NER) were ranged from 1.20-1.37 and 1.20-1.30 respectively;at 100 kg/hm2 N application rate,intercropped oat and sunflower had the highest seed yield (4.40 and 6.65 t/hm2),above ground biomass (12.81 and 12.40 t/hm2) and N uptake (182.78 and 192.12 kg/hm2).The aboveground biomass and N uptake for intercropped oat was increased by 17.2％-35.4％ compared to sole oat while the yield and N uptake for intercropped sunflower was increased by 22.78％-46.15％ compare to sole sunflower.Intercropping significantly decreased soil (0-60 cm) nitrate nitrogen accumulation in the border rows of intercropped oat after oat harvest,however,it significantly increased soil nitrate nitrogen accumulation in the border rows of intercropped sunflower.Overall,it was found that 100 kg/hm2 nitrogen application rate was optimal for oat and sunflower strip intercropping in this region.关键词
向日葵/燕麦/土地当量比/氮素吸收当量比/硝态氮Key words
sunflower/oat/land equivalent ratio/nitrogen uptake equivalent ratio/nitrate nitrogen分类
农业科技引用本文复制引用
钱欣,许和水,葛军勇,曾昭海,任长忠,郭来春,王春龙,胡跃高..施氮量及间作对燕麦、向日葵生产力及土壤硝态氮累积的影响[J].中国农业大学学报,2018,23(3):1-9,9.基金项目
国家燕麦荞麦产业技术体系(CARS-08-B-1) （CARS-08-B-1）
