Response of Coastal Bermudagrass Yield and Nutrient Uptake Efficiency to Nitrogen Sources

Silveira, Maria L.; Haby, V. A.; Leonard, A. T.

doi:10.2134/agronj2006.0200

Cited by 38 publications

(49 citation statements)

References 25 publications

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“…Researches show that the agronomic efficiency of N in forage yield is usually reduced with increment of N fertilization in pastures (Fagundes et al, 2006;Silveira et al, 2007;Mello et al, 2008;Canto et al, 2013), which is consistent with the results obtained in the present study.…”

Section: Discussionsupporting

confidence: 92%

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Galindo¹,

Buzetti²,

Filho³

et al. 2017

Aust J Crop Sci

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Nitrogen is the nutrient that most influences productivity and pasture quality but nitrogen fertilization efficiency still needs to be increased. The objective of this work was to study the efficiency of nitrogen sources and doses (N) on the yield of Panicum maximum cv. Mombasa applied during rainy and dry periods. The soil of the experimental area is an ultisol with a sandy texture. The experimental design was a randomized block in a factorial scheme with four replications, two sources of nitrogen: urea and ammonium nitrate and five N doses (0, 50, 100, 150 and 200 kg ha -1 per cutting), in total 0, 300, 600, 900 and 1200 kg ha -1 per season-dry or rainy, respectively). The dry matter yield (DMY) and nitrogen use efficiency (NUE), agronomic efficiency (AE), recovery of applied nitrogen (RAN) and physiological efficiency (PE) were evaluated. The results showed that N source did not influence DMY, NUE, AE, RAN and PE. However, the N doses influenced DMY positively, and negatively NUE, AE, RAN and PE. Generally, the increase was occurred in DMY with the increase of N doses and decrease in NUE, AE, RAN and PE. As the N source did not influence the analyzed attributes, it is recommended to use urea, because it is a fertilizer with the highest N concentration and lowest cost per unit of nutrient, at a dose of 100 kg ha -1 per cut, favoring DMY gain. In addition this urea assists with the management and maintenance of the Mombasa guineagrass.

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Section: Discussionsupporting

confidence: 92%

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Galindo¹,

Buzetti²,

Filho³

et al. 2017

Aust J Crop Sci

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“…Apart from slightly reducing the ASY and PSY in 2010/2011, CCD2 would enable systems in which the production of forage and seed is combined with the use of forage for grazing, green forage, and silage. Although ASY had a slight increase because of N 225 on CCD1 and CCD2, in comparison to the N 150 dose, there are some aspects which limit the recommendation of these dates, as N higher cost, the likely higher soil acidification (Silveira et al, 2007), and issues related to environmental pollution, especially regarding groundwater and N leaching.…”

Section: Resultsmentioning

confidence: 99%

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Canto

Almeida

Costa

et al. 2016

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effects of closing cut dates (CCD) and nitrogen (N) rates on the components of pure seed yield (PSY) and seed quality in 'Mombasa' grass (Megathyrsus maximus 'Mombaça'), besides determining the parameters of apparent N efficiency (ANE) and agronomic N efficiency (AgNE). The field experiments were carried out over two growing seasons, 2010/2011 and 2011/2012, in Umuarama, PR, Brazil. The folllowing treatments were evaluated: CCD on October 10, January 31, February 15, and March 1; and N doses at 0, 75, 150, and 225 kg ha -1 . Significant interactions between the CCD and N doses were observed for the panicle tiller number (PTN), pure seeds per panicle, PSY, ANE and AgNE. Values of ANE and AgNE were better for 150 kg N ha -1 . There were no effects of CCD and N doses on seed quality. PSY was closely correlated with PTN, pure seeds per panicle, and pure seed number.The CCD treatments of longer growth duration and higher N doses showed the higher PSY. Final CCD delaying until February and N availability reduced yield. Closing cut date and N fertilization affect pure seed yield and yield component responses of 'Mombasa' grass.Index terms: agronomic nitrogen efficiency, apparent nitrogen efficiency, seed quality, seed yield. de N. A DR e o N não tiveram efeitos sobre a qualidade das sementes. O RSP foi estreitamente correlacionado ao NPP, às sementes puras por panícula e ao número de sementes puras. As DRs com maiores durações de crescimento e doses de N tiveram maiores RSP. O atraso da DR final até fevereiro e a disponibilidade de N reduziram os rendimentos. A data de rebaixamento e a adubação com N afetam as respostas do rendimento de sementes puras e as componentes do rendimento do capim-mombaça. Produção de sementes de capim-mombaça submetido a diferentes datas de rebaixamento e doses de nitrogênioTermos para indexação: eficiência agronômica de nitrogênio, eficiência aparente de nitrogênio, qualidade de sementes, rendimento de sementes.

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“…The digest was analyzed for total N by diffusion distillation, P by the molybdenum blue method and K by atomic absorption. Nutrient uptake efficiency (N, P and K) was estimated by the following equation (Silveira et al 2007 At the end of the experiment, four randomly selected seedlings from each experimental unit were measured for leaf area. All leaves of each unit were separately collected and scanned to obtain leaf photographs with a Canon ImageClass MF 4100 scanner.…”

Section: Harvesting Measurementsmentioning

confidence: 99%

Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

Lin

Zeng

et al. 2012

Soil Science and Plant Nutrition

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The growth characteristics and nutrient uptake dynamics of Mytilaria laosensis Lec. seedlings treated weekly with conventional and exponential fertilizations were investigated at intervals of 3 weeks for 12 weeks in a greenhouse. Leaf area and pigment compositions were also examined at the final harvest. The fertility treatments (mg nitrogen seedling -1 ) included two conventional (50C and 100C) and four exponential (50E, 100E, 200E and 400E) fertilizations, and no fertilization (0) as control. The biomass and nutrient contents of M. laosensis seedlings increased exponentially with time. Steady-state nutrition of nitrogen (N) and phosphorus (P) were achieved under exponential fertilization treatment of 50 mg N seedling À1 (50E) and conventional fertilization treatment of 100 mg N seedling -1 (100C), resulting from simultaneous increase of their biomass and nutrient contents. The nutrient uptake efficiency continuously increased over time in conventionally fertilized seedlings, but it increased initially and declined or remained stable from 11 weeks after transplanting in the exponentially fertilized seedlings. At the end of the experiment, the conventionally fertilized seedlings performed remarkably better than all exponentially fertilized seedlings except for seedlings in the exponential treatment of 200 mg N seedling -1 (200E) in height, root collar diameter and biomass. The optimum N and P uptake occurred in 200E seedlings because their N and P contents were 71%/60% and 14%/9% higher than both conventionally fertilized seedlings (50C/100C) without significant differences in growth performance between them. The leaf areas and chlorophyll contents of seedlings increased significantly with the increase of fertilizer levels and nearly peaked at the range from 100 to 200 mg N seedling -1 , whereas the delivery schedule (conventional and exponential) had little effect on leaf areas and chlorophyll contents of seedlings at the same nutrient level (50 or 100 mg N seedling -1 ). These findings will provide evidence to make guidelines on fertilization for nursery production of M. laosensis, and help understand the nutrient demands for this species and further benefit the development of its plantations.

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Response of Coastal Bermudagrass Yield and Nutrient Uptake Efficiency to Nitrogen Sources

Cited by 38 publications

References 25 publications

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Application of different nitrogen doses to increase nitrogen efficiency in Mombasa guinegrass (Panicum maximum cv. mombasa) at dry and rainy seasons

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

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