Enhanced Plant Rooting and Crop System Management for Improved N Use Efficiency

Rosolem, Ciro Antônio; Ritz, Karl; Cantarella, Heitor; Galdos, Marcelo Valadares; Hawkesford, Malcolm J.; Whalley, W. R.; Mooney, Sacha J.

doi:10.1016/bs.agron.2017.07.002

Cited by 55 publications

(44 citation statements)

References 146 publications

(161 reference statements)

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“…In Ethiopia, N P fertilizers are commonly applied [16]. Nitrogen is the most dynamic nutrient element and the most important nutrient that is required for the survival of all living things [17][18][19][20][21]. Increases in N supply within limits are associated with increase in leaf area, carboxylases, and chlorophyll content, all of which determine the photosynthetic activities of leaf and ultimately dry matter production and allocation to the various organs of a plant [20,22].…”

Section: Major Fertilizers For Sesamementioning

confidence: 99%

“…e applied N fertilizer can be either taken up by the crop or lost to the environment [32][33][34]. According to Nielsen [35] and Rosolem et al [17], nitrogen use efficiency is primarily influenced by two factors: health of the crop and nitrogen losses (leaching, denitrification, and volatilization). All applied N fertilizers eventually convert to the nitrate-N form.…”

Section: Duration Of N Availability In the Plant Root Zonementioning

confidence: 99%

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Effect of Nitrogen Fertilization on the Growth and Seed Yield of Sesame (Sesamum indicum L.)

Zenawi

Mizan

2019

International Journal of Agronomy

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Sesame (Sesamum indicum L.) is grown mainly in the tropics. It is typically grown by smallholders with nearly all of its production in developing countries. It is an important source of high-quality oil and protein. Inappropriate use of fertilizers and monocropping are among the major production constraints. The objective of this paper is therefore to review the effect of N fertilizers on sesame growth and productivity. Growth and yield of sesame are greatly influenced by the application of N fertilizer. In most of the sesame-producing countries, optimum seed yield of sesame was obtained from application of 46–100 kg·N/ha. Adequate nitrogen fertilization also improves uptakes of other nutrients, particularly P and K and some micronutrients. Preemergence application of mobile nitrogen (urea) is less efficient due to losses. Mobile form of N fertilizer became available within two days for the crop. Split N applications where the N fertilizer is applied at different growth stages of the crop increases productivity. Side-dress application is one of the easiest ways to maximize nitrogen use efficiency. N fertilizers should be placed 3–5 cm deeper than the seeds and 5–10 cm apart from the plant for side dress but not far than 20 cm. Under optimal environmental conditions, nitrogen fertilizer has no effect on phonological traits but on the growth parameters. In the potential areas, application of 46–100 kg·N/ha gives maximum yield and lowering the application of N to less than 46 kg·N/ha in marginal areas is economical.

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Section: Major Fertilizers For Sesamementioning

confidence: 99%

Section: Duration Of N Availability In the Plant Root Zonementioning

confidence: 99%

Effect of Nitrogen Fertilization on the Growth and Seed Yield of Sesame (Sesamum indicum L.)

Zenawi

Mizan

2019

International Journal of Agronomy

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“…As it is a genetically controlled factor, the nutritional efficiency of a given species and/or genotype can be an aid to breeding programs through which it is possible to select species with a greater capacity to absorb and transport nutrients when under limiting conditions for growth (Rosolem et al, 2017;Retamal-Salgado et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

Souza¹,

Ritterbusch²,

Menegatti³

et al. 2019

JAS

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The aim of this study was to evaluate the efficiency of nutrient uptake, accumulation, distribution and use, and its relationship with growth variables, chlorophyll content, and root and shoot dry-weight partitioning in the ‘Okinawa Roxo’ peach rootstock, submitted to different nutrient solutions and substrates. The experimental design was completely randomised, with four treatments and five replications. The treatments were T1: Ns1 = Souza et al. nutrient solution (2011), applied to a sand substrate; T2: Ns2 = Hoagland and Arnon (1950), applied to a sand substrate; T3: Commercial Substrate + H2O; and T4: Control, Sand + H2O. Ninety days after transplanting (DAT), morphological, physiological and nutritional parameters were determined in the ‘Okinawa Roxo’ rootstock, together with the correlation between nitrogen concentration and nitrogen balance index, and the chlorophyll content and index. The greatest zinc content was detected in the shoots of the ‘Okinawa Roxo’ plants, at more than 80% of the accumulated total. Treatments T1 and T2 (nutrient solutions Ns1 and Ns2 respectively) made it possible to obtain ‘Okinawa Roxo’ plants with the best morphophysiological characteristics, being ready for grafting three months after transplanting in a greenhouse. The use of the Ns1 nutrient solution resulted in greater efficiency in the uptake and use of the nutrients nitrogen (N), potassium (K) and iron (Fe). The N and Total Chlorophyll concentrations in the leaves of the red-leaved peach tree can be estimated indirectly with a chlorophyll meter, and are an accurate indication of the nutritional status of the plant in relation to nitrogen content.

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“…Nitrogen is one of the primary nutrients and is generally the principal factor in determining crop yield on a global scale (Fageria, ; Rosolem et al, ). Most world soils have less than required available N, and this nutrient accounts for the largest share of the present annual fertiliser consumption (Aulakh & Malhi, ).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertiliser and establishment method affect growth, yield and nitrogen use efficiency of rice under alternate wetting and drying irrigation

Santiago‐Arenas

Fanshuri

Hadi

et al. 2020

Annals of Applied Biology

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Sustainable rice production through selection of best suitable cultivar, water-efficient crop establishment method and optimum nitrogen (N) management practice is needed to feed the growing world population. Two polyhouse experiments were conducted to evaluate the response of rice to different rates and schedules of N application under different establishment methods subjected to alternate wetting and drying (AWD) irrigation. In the first experiment, the response of two rice cultivars (Pathumthani 1, RD57) under three establishment methods (transplanting [TP], wet direct seeding [WDS], dry direct seeding [DDS]) and five N rates (0 [N 0 ], 30 [N 30 ], 60 [N 60 ], 90 [N 90 ], 120 [N 120 ] kg ha −1 ) was evaluated. The second experiment consisted of the same cultivars and establishment methods, but with four N application schedules (T 1 : 100% at basal; T 2 : 75% + 25% at basal and at active tillering, respectively; T 3 : 50% + 25% + 25% at basal, at active tillering and at panicle initiation, respectively; and T 4 : 25% + 25% + 25% + 25% each at basal, at active tillering, at panicle initiation and at early flowering or just before heading starts) applied at the rate of N 60 kg ha −1 . Plants were maintained under AWD irrigation (soil was saturated by applying water whenever soil water potential drops to −5 kPa during the implementation period) in both experiments. RD57 performed better than Pathumthani 1 having higher shoot dry matter, panicle number, grain yield, total N uptake and apparent N recovery efficiency. TP gave better response than WDS and DDS regardless of cultivars. Application of N 120 resulted in better growth, yield and its components and total N uptake regardless of establishment methods and cultivars. Increasing N rate decreased N use efficiency (NUE). Scheduling the interval of N application to two or three times (T 2 or T 3 ) for RD57 and Pathumthani 1, respectively, provided overall better results, and could be recommended for the tested rice cultivars. An optimal N rate and selection of critical growth stages for N application would be very effective for maximising yield and NUE under the water-saving cultivation technique of AWD irrigation. K E Y W O R D Sdry direct seeding, establishment method, transplanting, water-saving irrigation, wet direct seeding

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Enhanced Plant Rooting and Crop System Management for Improved N Use Efficiency

Cited by 55 publications

References 146 publications

Effect of Nitrogen Fertilization on the Growth and Seed Yield of Sesame (Sesamum indicum L.)

Effect of Nitrogen Fertilization on the Growth and Seed Yield of Sesame (Sesamum indicum L.)

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

Nitrogen fertiliser and establishment method affect growth, yield and nitrogen use efficiency of rice under alternate wetting and drying irrigation

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