Nitrogen fertilizer rate and timing of application for potato under different irrigation methods

• DOI: 10.1016/j.agwat.2023.108312
• Publication Date: 2023-04-12T16:49:12Z
• Authors: Andre Luiz Biscai...; Lincoln Zotarelli; Michael D. Dukes; Edzard van Santen; Senthold Asseng
• Keywords: DNS root zone; Tile drainage

Splitting nitrogen (N) fertilizer application is key to increasing potato tuber yield and uptake efficiency (NUpE), particularly in coarse-textured soils. The study objective was determine optimum N rates timing maximize plant growth under four irrigation methods: seepage, subirrigation with drain tile, subsurface drip (SDI) for water table level management, sprinkler. A factorial design of three applied at planting (Npl) (0, 56, 112 kg ha−1), followed by two (56 ha−1) emergence (Neme), initiation (Nti) were randomized a complete block replicates each method the spring 2015 2016. Rainfall events directly influenced management volume required maintain soil moisture range 0.11–0.16 m3 m−3 0–15 cm depth irrigating or draining field. target 295, 144, 125, 96 mm 2015, 287, 194, 165, 89 2016 subirrigation, SDI, sprinkler, respectively. Consequently, different drainage capabilities impacted root zone, impacting N, growth, yield. NUpE significantly lower seepage (48 %) compared other methods that averaged 60 %. Total 32.2, 37.2, 34.7, 33.3 Mg ha−1 Irrigation productivity 8.9, 16.9, 18.8, 27.7 There no interaction between treatment on yield; thus, an strategy rate cultivated these determined. combining 112, 56 planting, emergence, initiation, respectively, matches curve while minimizing risk loss. Seepage had highest incidence disorders lowest specific gravity, indicating alternative methods, when managed ideal rootzone, can potentially outperform regarding conservation, quality.