Agronomic Assessment of Nitrogen Use Efficiency in Spring Wheat and Interrelations with Leaf Greenness Under Field Conditions

Noulas, Christos; Herrera, Juan M.; Tziouvalekas, Miltiadis; Qin, Ruijun

doi:10.1080/00103624.2018.1431267

Cited by 22 publications

(14 citation statements)

References 78 publications

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“…The effectiveness of nitrogen fertilization can be assessed not only by the quantity of the yield obtained, but also by other indicators, such as marginal efficiency, agronomic efficiency, physiological efficiency, and nitrogen recovery [53,54]. These parameters show the ability of plants to convert the uptaken N to yield; values of these parameters decrease as the fertilization level increases [52,55].…”

Section: Resultsmentioning

confidence: 99%

Efficiency of Nitrogen Fertilization of Winter Wheat Depending on Sulfur Fertilization

et al. 2020

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Optimization of fertilization enables to obtain a yield of high quality and quantity, brings economic profits, and reduces environmental threats. The aim of the three-year field experiment was to determine the efficiency of fertilization with a new fertilizer available on the Polish market and containing nitrogen (N) and sulfur (S) in proportions designed for cereals cultivation (30% N and 6% S as ammonium nitrate and ammonium sulfate). Other treatments included no fertilization; fertilization with ammonium nitrate (34% N); fertilization with standard nitrogen and sulfur fertilizer with N supplementation with ammonium nitrate. Nitrogen doses were 150, 200, and 250 kg N ha−1. Sulfur was applied in doses of 30, 40, and 50 kg S ha−1. A beneficial effect of using fertilizer containing N and S in proportions designed for cereals cultivation was observed. The highest mean optimal nitrogen dose and maximum winter wheat yield were recorded for the new fertilizer (217 kg N ha−1 and 8251 kg ha−1, respectively). Sulfur supplementation with the new fertilizer significantly increased apparent nitrogen recovery (mean values 48.9%, 44.6%, and 40.6% for doses 150, 200, and 250 kg N ha−1, respectively), agronomic efficiency (11.1 and 8.6 kg kg−1 N for doses 200 and 250 kg N ha−1, respectively), and physiological efficiency (24.7 kg kg−1 N for dose 200 kg N ha−1).

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Section: Resultsmentioning

confidence: 99%

Efficiency of Nitrogen Fertilization of Winter Wheat Depending on Sulfur Fertilization

et al. 2020

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“…The chlorophyll meter SPAD-502 (SPAD, Kelana Jaya, Malaysia; Konica Minolta Holdings Inc.-Tokyo, Japan) was utilized to determine the relative amount of leaf chlorophyll at different growth stages. Measurements were recorded as mean value of 10 randomly selected main tiller per plot, taken as approximately one-third of the length from the base of the youngest fully expanded leaf [25,26]. The measurements were performed at about the same time (middle day).…”

Section: Spad Measurementsmentioning

confidence: 99%

“…For each cultivar, six SPAD measurements were collected during the two crop cycles: stem elongation phase (SPAD1; BBCH stage 31-39), flag leaf (SPAD2; BBCH stage 41), heading date (SPAD3; BBCH stage 53-59), flowering (SPAD 4; BBCH stage 63-67), development of grain to early-late milk (SPAD 5; BBCH stage 72-78) and ripening-soft dough (SPAD 6; BBCH stage 80-86) [24]. According to Noulas et al [25], the SPAD values were used as a direct measure of leaf greenness because the plant material tested was restricted to a single crop species.…”

Section: Spad Measurementsmentioning

confidence: 99%

Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

et al. 2020

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In wheat, the increase in nitrogen use efficiency (NUE) and optimization of the nitrogen doses to be used are both very important aspects for improving sustainable and productive agriculture. The aim of this study was to investigate, under rainfed Mediterranean conditions, the influence of strobilurin treatment and N fertilization on durum wheat N use efficiency for yield (NUEy) and protein (NUEp) and on the contribution of their components, nitrogen uptake efficiency (UPE) and nitrogen utilization efficiency (NUtE). Two durum wheat cultivars (Saragolla and Sfinge) were grown for two years in field conditions under five nitrogen treatments (60 kg ha−1 N60; 90 and 120 kg ha−1 given two and three times; N90, N90T3, N120 and N120T3) comparing a control without strobilurin treatment (ST0) and one application of strobilurin (STaz). In Sfinge, STaz caused a decrease in UPE and NUEp and an increase in NUtE and NUEy. In Saragolla, the opposite behavior was observed. Moreover, strobilurin positively affected the contribution of UPE and negatively that of NUtE to NUEy only in Saragolla. Furthermore, strobilurin determined higher NUEy and NUEp values under most of the N treatments adopted in the drier year. With this study, we supported the hypothesis that in Mediterranean conditions, the possibility of reducing N rate application from 120 to 90 kg ha−1 with a strobilurin-based treatment, even in the absence of fungal diseases, could represent a useful agronomic strategy for durum wheat grown under drought conditions as those predicted under the ongoing climate change.

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“…A similar result was reported by Hassen et al [54] for the vetch-oat association, where it has been shown that a twice-divided intake of 20 u N ha -1 is likely to provide efficient fertilization for optimal forage yield. Noulas et al [55] concluded that there is a large potential for increasing NUE by improving N recirculation, use of fast and inexpensive crop N monitoring tools and higher yield and sustainability [56]. Hawkesford mentioned that NUE is a complex trait comprising two key major components, N uptake and N utilization efficiency, both also complex traits in themselves, each involving many physiological processes and biochemical pathways.…”

Section: Dry Matter Yield Quality and Agronomic Traitsmentioning

confidence: 99%

Effect of Different Levels of Nitrogen Fertilization on Forage Yields and Quality of Hairy Vetch (Vicia villosa, Roth) Triticale (Xtritcosecale, Witmack) Mixtures

Benyoussef¹,

Kachout²,

Abidi³

et al. 2019

TOASJ

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Background: Intercropping legumes with cereals for forage production is a sustainable technique showing several environmental benefits. Aim: This study aimed to investigate the effect of different levels of nitrogen fertilization on forage yields and quality of hairy vetch (Vicia villosa, roth) –triticale (X tritcosecale, witmack) mixtures. Methods: The effect of five increasing nitrogen rates (0, 10, 20 30 and 50 kg N ha-1) on the growth rate, forage yield, quality and interspecific competition of hairy vetch-winter triticale mixture was investigated under rainfed regime at the INRAT experimental station of Mornag. Results: Nitrogen application induced an increase in dry matter yield from 7.6 to 9 T DM ha-1 obtained with 30 kg N ha-1. This rate corresponds to the most efficient nitrogen rate as expressed by kg DM per Kg of added N. It reached a mean value of 47 kg DM kg-1 N. Moreover, application of increasing nitrogen rate caused an increase in LER (Land Equivalent Ratio) of the mixture over the unit (LER=1.58 at 30 kg N ha-1) and the competition ability of the triticale through CRt increase, suggesting the advantage of the mixture over sole crops. Crude protein content has been increased by two points from zero nitrogen application to other rates. However, no evident variation in fibers and Metabolizable Energy (ME) content was detected along with nitrogen application, but, mean values of 18% of CP content, 34% of NDF content and 9.7 Mj kg-1 DM of ME were denoted as high forage nutritional values compared to other most Tunisian conventional forages. Conclusion: The results of this study indicate that hairy vetch intercrops with winter triticale produced higher dry matter than the common vetch sole crop.

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Agronomic Assessment of Nitrogen Use Efficiency in Spring Wheat and Interrelations with Leaf Greenness Under Field Conditions

Cited by 22 publications

References 78 publications

Efficiency of Nitrogen Fertilization of Winter Wheat Depending on Sulfur Fertilization

Efficiency of Nitrogen Fertilization of Winter Wheat Depending on Sulfur Fertilization

Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

Effect of Different Levels of Nitrogen Fertilization on Forage Yields and Quality of Hairy Vetch (Vicia villosa, Roth) Triticale (Xtritcosecale, Witmack) Mixtures

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