 Effect of alternate partial root-zone drying (PRD) on soil nitrogen availability to alfalfaJing Zhang, Ying Ying Chen, Wen Hui Liu and Zheng Gang Guo Agricultural Water Management, 2021, vol. 258, issue C Abstract: Available soil N is critical for N fertilizer management in crop production but the effects of alternate partial root-zone drying (PRD) on the dynamics of N and the impact of these effects on perennial crops such as alfalfa (Medicago sativa L.) have not been evaluated. A field experiment was conducted to compare two irrigation modes (PRD and conventional furrow irrigation (CFI)) in combination with four irrigation levels (70% ETc (evapotranspiration), 85% ETc, 100% ETc, and 115% ETc). PRD improved the mineralization of organic matter to increase available N and the NO3−-N/NH4+-N ratio. Thus, it increased N uptake, water productivity and maintained seasonal forage yield. The combination of PRD and irrigation level (100% Etc) produced maximum NO3−-N stock. These results present an evaluation of how PRD influences soil N availability to N-fixing perennial crops. Keywords: Alternate partial root-zone drying; Seasonal forage yield; Soil N stocks; NO3−-N/NH4+-N ratio (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:258:y:2021:i:c:s0378377421004443 DOI: 10.1016/j.agwat.2021.107167 Access Statistics for this article Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns More articles in Agricultural Water Management from Elsevier |
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