Evaluation of Variable Rate Nitrogen and Reduced Irrigation Management for Potato Production

Bohman, Brian J.; Rosen, Carl J.; Mulla, D. J.

doi:10.2134/agronj2018.09.0566

Cited by 31 publications

(41 citation statements)

References 60 publications

(95 reference statements)

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“…‘Russet Burbank’ potato, a processing variety common to the region, was grown each year following a previous full season crop of rye ( Secale cereal L.). Preplant soil test chemical characteristics have been reported previously, including soil organic matter in the 0‐ to 15‐cm depth of 1.8 and 1.9% in 2016 and 2017, respectively (Bohman et al., 2019). Average air temperature and cumulative precipitation during the growing season was 19.2°C and 613 mm in 2016 and 18.5°C and 433 mm in 2017, observed at the weather station at the SPRF.…”

Section: Methodsmentioning

confidence: 68%

“…A companion study was previously published detailing agronomic findings and water balance from the experiment in the present study (Bohman et al., 2019). In summary, the previous companion study found that reducing irrigation rate by 15% did not affect tuber yield in humid climates, and remote sensing was able to reduce N rate by 15% without impacting tuber yield.…”

Section: Introductionmentioning

confidence: 82%

“…Additional description of site conditions and cultural management can be found in the supplemental material or Bohman et al. (2019).…”

Section: Methodsmentioning

confidence: 99%

“…Irrigation rate and timing was the main plot treatment (with two treatments), and N rate, source, and timing was the subplot treatment (with six treatments). A plot map and detailed plot layout description is included in the supplemental materials (Supplemental Figure S1) and the companion paper (Bohman et al., 2019). Whole “B” seeds were planted on 22 Apr.…”

Section: Methodsmentioning

confidence: 99%

“…Remote sensing for variable rate (VR) N management is generally regarded as one of the most important tools currently available to improve on existing in‐season management practices (Mulla, 2013). Although remote sensing‐based N management methods for potato have been previously suggested (Goffart, Olivier, & Frankinet, 2008; Nigon et al., 2015) and evaluated for agronomic effectiveness (Bohman, Rosen, & Mulla, 2019; van Evert et al., 2012), their effectiveness at reducing N losses has not yet been reported for potato. In a similar manner to existing in‐season N management tools such as chlorophyll meters and petiole nitrate measurements (Gianquinto et al., 2004; Giletto & Echeverría, 2013; Goffart, Olivier, & Frankinet, 2011; Shrestha et al., 2010), remote sensing should be able to optimize N application by identifying occurrence of crop N stress.…”

Section: Introductionmentioning

confidence: 99%

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Impact of variable rate nitrogen and reduced irrigation management on nitrate leaching for potato

2020

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Nitrogen (N) loss from cropping systems has important environmental implications, including contamination of drinking water with nitrate. A 2‐yr study evaluated the effects of six N rate, source, and timing treatments, including a variable rate (VR) N treatment based on the N sufficiency index approach using remote sensing, and two irrigation rate treatments, including conventional and reduced rate, on nitrate leaching, residual soil nitrate, and plant N uptake for potato (Solanum tuberosum L. cv. Russet Burbank) production in 2016 and 2017 on a Hubbard loamy sand. Nitrate leaching losses measured with suction‐cup lysimeters varied between 2016 and 2017 with flow‐weighted mean nitrate N concentrations of 5.6 and 12.8 mg N L−1, respectively, and increased from 7.1 to 10.4 mg N L−1 as N rate increased from 45 to 270 kg N ha−1. Despite reductions in N rate of 22 and 44 kg N ha−1 in 2016 and 2017, respectively, for the VR N treatment, there was no significant difference in nitrate leaching compared with the existing N best management practices (BMPs). Reducing irrigation rate by 15% decreased nitrate leaching load by 17% through a reduction in percolation. Residual soil nitrate N in the top 60 cm across all treatments (7.9 mg N kg−1) suggests a risk for nitrate leaching during the nongrowing season, and plant N uptake did not explain yearly variation in nitrate leaching and residual soil nitrate. Although existing N BMPs are effective at controlling N losses, development of alternative practices is needed to further reduce the risk of groundwater contamination.

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Section: Methodsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 82%

“…Additional description of site conditions and cultural management can be found in the supplemental material or Bohman et al. (2019).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of variable rate nitrogen and reduced irrigation management on nitrate leaching for potato

2020

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Chlorophyll meter‐based leaf nitrogen status to manage nitrogen in tropical potato production

et al. 2021

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Potato (Solanum tuberosum L.) is a N intensive crop, and meeting its requirements with N fertilization is the primary practice to improve N recovery and achieve suitable tuber yield. A 3-site-year (SY) study was conducted to assess soil plant analysis development (SPAD)-502 chlorophyll meter efficacy for providing potato leaf real-time N status to adjust N timing and rate using nitrogen sufficiency index (NSI) thresholds of 90 or 95%. We evaluated effects of in-season SPAD-based N managements, as well as a reference with non-limiting N application, a fixed-timing (planting and hilling) conventional N fertilization, and a zero-N control on crop N uptake, tuber yield, and N-use efficiency of potato cultivar Agata grown in tropical clay soils. Tuber yields were similar in both SPAD-based managements. Under no intensive rainfall events after N applications, SPAD-based managements reduced N applications by 38-63% and resulted in comparable tuber set, bulking, and yield relative to conventional N fertilization. Additionally, SPAD-based management at a NSI threshold of 90% resulted in greater potato N-uptake efficiency and tuber yield per unit of N applied. SPAD-502 sensor was efficient for detecting plant N status when environmental conditions were more conducive for potato production and optimized N management by reducing application rates. However, with less favorable temperature and solar radiation for potato cultivation, and with intensive rainfall events following N application, SPAD readings did not guide to a proper N fertilization and resulted in reduced tuber yield. Therefore, under such conditions, a more accurate method for detecting plant N status should be used.

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Water use efficiency and nitrogen use efficiency of apical rooted cuttings of potato grown in a mollic Andosol

Satognon

Owido

Lelei

2022

Urban Agric & Regnl Food Sys

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Water and nitrogen (N) are key interacting factors that control plant growth. The objective of the study was to determine the effect of N rates and drip irrigation regimes on water use efficiency (WUE) and N use efficiency (NUE) of apical rooted cuttings of potato (Solanum tuberosum L.) grown in a mollic Andosol. The treatments comprised four drip irrigation regimes of 50%, 75%, 85% and 100% of the crop evapotranspiration (ETC), where ETC100% was irrigated according to the soil water depletion 2 d after full irrigation and four N rates: 0 (N0), 60 (N1), 90 (N2) and 130 kg N ha −1 (N3). The results showed that potato tuber yield, WUE, and NUE were significantly (P < .001) affected by irrigation regimes, N rates, and the interaction of both factors. The highest potato tuber yield, 58.29 Mg ha −1 , was obtained under ETC100% with N3, whereas the highest WUE, 17.5 kg m −3 , was found under ETC50% with N3. The apical rooted cuttings of potato grown under ETC100% with N2 produced the maximum NUE, 208.30 kg kg −1 . The correlation coefficient (r = 0.31; P < .01) obtained between WUE and NUE was weak. It was also observed that an increase in irrigation amount decreased WUE and increased NUE, whereas a high N dosage increased WUE and decreased NUE of potato grown in a mollic Andosol. This study suggests that if the farmers aim to maximize NUE of apical rooted cuttings in a mollic Andosol, then they will do so at the expense of potato WUE, and yield will be looked at as a secondary factor. INTRODUCTIONPotato (Solanum tuberosum L.) is one of the major root and tuber food crops for many people around the world (FAO-STAT, 2017). Globally, 368 Tg of potato were produced in 2018 on an estimated area of 17.58 million ha (FAOSTAT, 2020). In Kenya, it is the second staple food and cash crop

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Evaluation of Variable Rate Nitrogen and Reduced Irrigation Management for Potato Production

Cited by 31 publications

References 60 publications

Impact of variable rate nitrogen and reduced irrigation management on nitrate leaching for potato

Impact of variable rate nitrogen and reduced irrigation management on nitrate leaching for potato

Chlorophyll meter‐based leaf nitrogen status to manage nitrogen in tropical potato production

Water use efficiency and nitrogen use efficiency of apical rooted cuttings of potato grown in a mollic Andosol

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