Yield and Protein Content of Irrigated Napiergrass, Guineagrass and Pangolagrass as Affected by Nitrogen Fertilization<sup>1</sup>

Little, S. T. ew; Vicente, José; Abruña, Fernando

doi:10.2134/agronj1959.00021962005100020016x

Cited by 22 publications

(18 citation statements)

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“…. The relative N uptake for the vanous treat.ments IS similar to other reports (I, 18,24,26,30)-~angmg fro.m 26 to 55% in 1980 and from 17 to 70% m 1981 (Fig. 2).…”

Section: Methodssupporting

confidence: 89%

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Mooso¹,

Jolley

1983

Agronomy Journal

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‘Pangola’ digitgrass (Digitaria decumbens Stent.) is an important tropical and subtropical forage species which responds dramatically to N fertilization. Responses to the application of P and K, however, or the combinations of N, P, and K are not as clearly defined. Its response to N, P, and K applied in solution has not been established. A 2‐year study to compare the effect of the application of liquid and solid N‐P‐K (9:1:4) fertilizers on digitgrass production and nutrient uptake was conducted on a Wabasso sand (siliceous, hyperthermic, Alfic Haplaquod) on the Deseret Ranches in Central Florida. There was a positive linear relationship between the amount of N‐P‐K fertilizer applied and the amount of forage produced. The concentrations of N and K were positively affected by increased N‐P‐K levels while P concentration was negatively affected. A positive linear relationship was also observed between the uptake of N, P, and K and the rate of application. The liquid fertilizer produced an average of 20.9 and 21.4% less forage than the solid for 1980 and 1981, respectively. Solid fertilizer maintained a higher N concentration in the forage than the liquid, but no differences in P and K concentrations were observed with the two forms of fertilizer. The forage treated with solid fertilizer averaged 24, 35, and 59% higher relative uptake of N, P, and K than the forage treated with liquid fertilizer, respectively. Under the conditions of the study, ammonia volatilization was probably the major reason for lower yields, N concentrations, and N uptake from the use of liquid fertilizer. The lower uptake of P and K with liquid fertilizer was associated with the lower yields obtained with this source.

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“…. The relative N uptake for the vanous treat.ments IS similar to other reports (I, 18,24,26,30)-~angmg fro.m 26 to 55% in 1980 and from 17 to 70% m 1981 (Fig. 2).…”

Section: Methodssupporting

confidence: 89%

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Mooso¹,

Jolley

1983

Agronomy Journal

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“…range from 2.0 to 2.6 g kg −1 , while a range of 2.4 to 2.8 g P kg −1 is suggested as the critical P level for common and 'Midland' bermudagrass (Adams et al, 1967). Little et al (1959) reported critical tissue P concentrations of 1.2 to 1.6 for 'Pangola' grass (Digitaria eriantha Steud. ).…”

Section: Introductionmentioning

confidence: 99%

Using Tissue Analysis as a Tool to Predict Bahiagrass Phosphorus Fertilization Requirement

Silveira

Obour

Vendramini

et al. 2011

Journal of Plant Nutrition

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2 Tissue analysis in combination with soil testing has been recently incorporated in the fertilization recommendations for bahiagrass in Florida; however, limited research is available to validate the proposed critical tissue phosphorus (P) level. A greenhouse experiment was conducted to identify the critical minimum tissue P concentration below which bahiagrass dry matter (DM) yield is impacted. Treatments consisted of three nitrogen (N) rates (0, 50, and 100 kg N ha −1 ), four P rates (0, 20, 40, 60 kg P 2 O 5 ha −1 ) and two clipping intervals (28 and 56 d). Bahiagrass yields and tissue P increased in response to P application. Phosphorus uptake showed a quadratic response to P rates when N was applied. Phosphorus recovery increased linearly as P rate increased. Root mass responded to P, even at the smallest (20 kg ha −1 ) rate. Data indicated that tissue P concentration of 1.3 (±0.2) g kg −1 can be used as an indicator of bahiagrass P deficiency.

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“…The goal is to select model parameters so as to minimize E. By this criterion, the 3rd order polynomial would be the preferred model because it provides perfect fit of the data (within round off error). Little et al [10] measured yield response of Napiergrass (Pennisetum purpureum), Guineagrass (Panicum maximum), and Pangolagrass (Digitaria decumbens) at applied N up to 1800 kg ha 21 in Puerto Rico and also found no evidence of a downturn in response. 1, this model exhibits weird behavior outside the data points, which is not expected on physical grounds.…”

Section: Discussionmentioning

confidence: 99%

“…(10) and (11), respectively. Next there is the practical matter of how to evaluate the coefficients for the model.…”

Section: Discussionmentioning

confidence: 99%

In Defense Of The Extended Logistic Model Of Crop Production

Overman

Scholtz

Martin

2003

Communications in Soil Science and Plant Analysis

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The extended logistic model has been used extensively to relate seasonal crop production to applied nutrients (such as nitrogen). Model estimates include dry matter yield, plant nutrient uptake, and plant nutrient concentration. It has been applied to perennials such as bermudagrass (Cynodon dactylon L.), bahiagrass (Paspalum notatum Flügge), dallisgrass (Paspalum dilatatum Poir), ryegrass (Lolium perenne L.), tall fescue (F. arundinacea Schreb.), and annuals such as corn (Zea mays L.). Dependence of response to such factors as water availability and harvest frequency (for perennials) can be incorporated into the model. On occasion readers still question the utility of the logistic model over other models (such as polynomials). This article attempts to clarify this point and offers a defense of the logistic model for analysis, design, and management of crop production systems.

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Yield and Protein Content of Irrigated Napiergrass, Guineagrass and Pangolagrass as Affected by Nitrogen Fertilization¹

Cited by 22 publications

References 0 publications

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Using Tissue Analysis as a Tool to Predict Bahiagrass Phosphorus Fertilization Requirement

In Defense Of The Extended Logistic Model Of Crop Production

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Yield and Protein Content of Irrigated Napiergrass, Guineagrass and Pangolagrass as Affected by Nitrogen Fertilization1

Cited by 22 publications

References 0 publications

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers1

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers1

Using Tissue Analysis as a Tool to Predict Bahiagrass Phosphorus Fertilization Requirement

In Defense Of The Extended Logistic Model Of Crop Production

Contact Info

Product

Resources

About

Yield and Protein Content of Irrigated Napiergrass, Guineagrass and Pangolagrass as Affected by Nitrogen Fertilization¹

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹

Pangola Digitgrass Yield and Nutrient Uptake with Liquid and Solid N‐P‐K Fertilizers¹