Preceding crops and nitrogen fertilization influence soil nitrogen cycling in no-till canola and wheat cropping systems
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- 作者：Mervin St. Lucea ; Cynthia A. Grantb ; Noura Ziadia ; noura.ziadi@agr.gc.ca" class="auth_mail" title="E-mail the corresponding author ; Bernie J. Zebarthc ; John T. O&rsquo ; Donovand ; Robert E. Blackshawe ; K. Neil Harkerd ; Eric N. Johnsonf ; Yantai Gang ; Guy P. Lafondh ; 1 ; William E. Mayh ; Sukhdev S. Malhii ; T. Kelly Turkingtond ; Newton Z. Lupwayie ; Debra L. McLarenb
- 关键词：ANFR ; apparent nitrogen fertilizer recovery ; ANM ; apparent in-crop nitrogen mineralization ; EONR ; economic optimum nitrogen rate ; faba bean-GRM ; faba bean grown as green manure ; faba bean-seed ; faba bean grown for seed ; field pea-GRM ; field pea grown as green manure
- 刊名：Field Crops Research
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：191
- 期：Complete
- 页码：20-32
- 全文大小：2193 K
文摘
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Rotation and N rate effect on N cycling and budgets were assessed in no-till soils.
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ANM was generally greater after green manure than legumes grown for seed.
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On average, ANM accounted for 40–65% of crop N uptake, more so after legumes.
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ANM was the main contributor to total N inputs when labile SOM content was high.
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N budget highlights the importance of N mineralized from SOM and crop residues.