{"title":"The Effect of Simulated Distribution of Soil Mineral Nitrogen and Root Traits on Wheat Yield and Grain Nitrogen Concentration","authors":"J. Haberle","doi":"10.1109/PMA.2006.50","DOIUrl":null,"url":null,"abstract":"The effect of different distribution of available mineral N (Nmin) in a soil profile, in combination with increasing N fertilization rates, on grain N concentration and yield of winter wheat was studied with the model CERES-wheat. A great proportion of Nmin in a deep subsoil under 90 cm resulted in enhancement of grain N concentration but at the expense of grain yield. Under a high total Nmin supply in rooted soil volume the effect was less. High N fertilization rates almost eliminated the effect of different Nmin distributions. The enhancement of root growth rate and maximum depth by 30% decreased significantly residual Nmin in deep subsoil when total Nmin was high. The modification had no impact on simulated grain N concentration but it increased yields, most remarkably when a great proportion of total Nmin could be found under 90 cm.","PeriodicalId":315124,"journal":{"name":"2006 Second International Symposium on Plant Growth Modeling and Applications","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 Second International Symposium on Plant Growth Modeling and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PMA.2006.50","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The effect of different distribution of available mineral N (Nmin) in a soil profile, in combination with increasing N fertilization rates, on grain N concentration and yield of winter wheat was studied with the model CERES-wheat. A great proportion of Nmin in a deep subsoil under 90 cm resulted in enhancement of grain N concentration but at the expense of grain yield. Under a high total Nmin supply in rooted soil volume the effect was less. High N fertilization rates almost eliminated the effect of different Nmin distributions. The enhancement of root growth rate and maximum depth by 30% decreased significantly residual Nmin in deep subsoil when total Nmin was high. The modification had no impact on simulated grain N concentration but it increased yields, most remarkably when a great proportion of total Nmin could be found under 90 cm.