Nitrogen fertigation: An integrated agronomic and environmental study

Castellanos, María Teresa; Tarquis, Ana M.; Ribas, F.; Cabello, M. J.; Arce, Augusto; Cartagena, M. C.

doi:10.1016/j.agwat.2012.06.016

Cited by 37 publications

(27 citation statements)

References 32 publications

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“…Previous studies also reported that fertigation has advantage in increasing crop yield, water– and nitrogen– use efficiencies 11,15,18,26–28 . For eggplant, the yield and N agronomic efficiency are augmented in the treatment of water and N via drip irrigation if compared with the treatment of soil N application and furrow irrigation (local irrigation method as control treatment) 29 .…”

Section: Discussionmentioning

confidence: 83%

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Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Kang

2017

Sci Rep

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Alternate partial root–zone drip irrigation (ADI) or fertigation has favorable effect on crop water- and nitrogen- use efficiencies (WUE and NUE). However, the advantage of combined application of ADI and nitrogen fertigation on crop WUE and NUE remains unclear. A pot experiment was conducted to investigate the impact of three irrigation methods (CDI conventional drip irrigation (both halves of pot irrigated), ADI (both halves of pot alternatively irrigated) and FDI fixed partial root–zone drip irrigation (fixed half of pot irrigated)) and five nitrogen treatments (F0 no N supplied, F1-F4 0.2, 0.18, 0.16 and 0.14 g N per kg soil via fertigation) on sweet-waxy maize. Compared with CDI, ADI reduced water consumption by 19.9%, but increased water use efficiency based on dry seed yield (WUEs) by 32.3%, and also enhanced nitrogen apparent recovery fraction (Nrf) and nitrogen agronomic efficiency (NAE). F1-F4 augmented dry mass accumulation, dry seed yield and total nitrogen uptake if compared to F0. Moreover, F2-ADI had higher shoot and total dry masses, WUEs, total nitrogen uptake, Nrf and NAE. Thus ADI increased nitrogen uptake, WUE and NUE of sweet-waxy maize with nitrogen fertigation of 0.18 g N per kg soil in this study.

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Section: Discussionmentioning

confidence: 83%

“…14 reported that compared with conventional fertilization, fertigation increases N use efficiency (NUE) by 14.3%. In addition, some studies showed that fertigation can also improve crop WUE 15–18 .…”

Section: Introductionmentioning

confidence: 99%

Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Kang

2017

Sci Rep

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“…Studies have reported that by increasing WUE, N addition could enhance plant productivity [39][40][41]. On the other hand, other researchers have found that N enrichment has no impact on WUE [42][43][44] or a negative effect on WUE [45,46]. Consequently, it is difficult to account for the differences in N-induced effects on WUE [47].…”

Section: Introductionmentioning

confidence: 99%

Impact of Nitrogen Fertilization on Forest Carbon Sequestration and Water Loss in a Chronosequence of Three Douglas-Fir Stands in the Pacific Northwest

Dou

Chen

Black

et al. 2015

Forests

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Abstract:To examine the effect of nitrogen (N) fertilization on forest carbon (C) sequestration and water loss, we used an artificial neural network model to estimate C fluxes and evapotranspiration (ET) in response to N fertilization during four post-fertilization years in a Pacific Northwest chronosequence of three Douglas-fir stands aged 61, 22 and 10 years old in 2010 (DF49, HDF88 and HDF00, respectively). Results showed that N fertilization increased gross primary productivity (GPP) for all three sites in all four years with the largest absolute increase at HDF00 followed by HDF88. Ecosystem respiration increased in all four years at HDF00, but decreased over the last three years at HDF88 and over all four years at DF49. As a result, fertilization increased the net ecosystem productivity of all three stands with the largest increase at HDF88, followed by DF49. Fertilization had no discernible effect on ET in any of the stands. Consequently, fertilization increased water use efficiency (WUE) OPEN ACCESSForests 2015, 6 1898 in all four post-fertilization years at all three sites and also increased light use efficiency (LUE) of all the stands, especially HDF00. Our results suggest that the effects of fertilization on forest C sequestration and water loss may be associated with stand age and fertilization; the two younger stands appeared to be more efficient than the older stand with respect to GPP, WUE and LUE.

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“…Many farmers in arid and semi-arid regions have adopted drip and sprinkler irrigation systems, while many also laser level their fields, and many deliver fertilizer via their on-farm irrigation systems in a process known as fertigation [107][108][109]. Optimizing the use of water and nutrients in crop production, planting hybrid varieties of some crops, using higher quality seeds, and implementing new methods of pest control, have contributed to the large and sustained increases in crop yields observed in many countries since the 1960s and 1970s [110][111][112][113].…”

Section: Technology For Sustainable Agriculturementioning

confidence: 99%

Achieving Water and Food Security in 2050: Outlook, Policies, and Investments

Wichelns

2015

Agriculture

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Food production in 2050 will be sufficient, globally, but many of the poor will remain food insecure. The primary cause of food insecurity will continue to be poverty, rather than inadequate food production. Thus, policies and investments that increase the incomes of the poor will remain the best ways to extend food security to all. Investments that promote growth in sustainable agriculture and provide non-farm employment opportunities in rural areas of lower income countries will be most helpful. There will be sufficient water, globally, to achieve food production goals and sustain rural and urban livelihoods, if we allocate and manage the resource wisely. Yet, water shortages will constrain agricultural production and limit incomes and livelihood opportunities in many areas. Policies and investments are needed to extend and ensure access to water for household use and agricultural production. Challenges requiring the attention of policy makers and investors include increasing urbanization and increasing demands for land and water resources. Policy makers must ensure that farmers retain access to the water they need for producing food and sustaining livelihoods, and they must create greater opportunities for women in agriculture. They must also motivate investments in new technologies that will enhance crop and livestock production, particularly for smallholders, and encourage the private sector to invest in activities that create employment opportunities in rural areas.

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Nitrogen fertigation: An integrated agronomic and environmental study

Cited by 37 publications

References 32 publications

Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Impact of Nitrogen Fertilization on Forest Carbon Sequestration and Water Loss in a Chronosequence of Three Douglas-Fir Stands in the Pacific Northwest

Achieving Water and Food Security in 2050: Outlook, Policies, and Investments

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