Effect of Various Rates and Frequencies of Potassium Application on Yield and Chemical Composition of Alfalfa and Alfalfa‐Orchardgrass<sup>1</sup>

Kresge, C. B.; Younts, S. E.

doi:10.2134/agronj1962.00021962005400040010x

Cited by 27 publications

(13 citation statements)

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“…Uptake of K increased with higher K applications because of both increased dry matter yield and increased K content. The K content was similar to that reported by other workers ( 1,3,18,27,36).…”

Section: Resultssupporting

confidence: 90%

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹

Laughlin¹,

Restad

1964

Agronomy Journal

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Synopsis K application increased dry‐matter yields. Each K increment increased the K content, tended to increase the sum of cations, and tended to decrease the Ca content and Ca/Mg ratio. The P and Mg contents were independent of K application. Forage contained very high Mg and low Ca producing a very low Ca/Mg ratio. Sulfate and muriate of potash were equally effective as K sources. Second clipping forage contained more P and Mg each year than first clipping forage.

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Section: Resultssupporting

confidence: 90%

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹

Laughlin¹,

Restad

1964

Agronomy Journal

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Section: Introductionmentioning

confidence: 99%

“…It has a high requirement for K and numerous researchers have reported yield responses to applied K (2,4,6,7,9,15,18,19). Alfalfa has been shown to respond to split applications of K on some soils (6,7,15). Positive yield responses to split applied K has resulted from more efficient use of applied K and/or a reduction in the toxic effects of high Cl\ Inadequate available K has been shown to result in a loss of alfalfa stand and increased weed competition (2,9,18,19).…”

Section: Introductionmentioning

confidence: 99%

Potassium fertilization effects on yield and longevity of established alfalfa

Burmester

Mullins

Ball

1991

Communications in Soil Science and Plant Analysis

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Limited information is available which describes the response of established alfalfa (Medicago sativa L.) to topdressing applications of K fertilizer in the Southeastern United States. Field experiments were conducted for three years to determine alfalfa response to rates and time of K application. The experiments were established in two-year old stands of alfalfa on a Decatur silty clay loam (clayey, kaolinitic, thermic Rhodic Paleudults) and a Hartsells fine sandy loam (fine loamy, siliceous, thermic Typic Hapludults) located in northern Alabama. Potassium as KCl was broadcast in the spring prior to regrowth. For split application treatments, the K was applied in early spring and after the second cutting. Annual total K rates ranged from 56 to 596 kg/ha. Potassium fertilization maintained alfalfa stand density on both soils, but the experiment on the Decatur soil was discontinued after two years due to severe stand loss when the lowest rate of added K was used. Alfalfa yields were increased by the application of K and maximum yields occurred when K was applied according to soil test recommendations made by the Auburn University soil testing laboratory. Potassium applications increased the concentration of K, decreased the concentration of Ca and Mg and had little effect on the concentration of N in tissue from the two cuttings sampled. The split application of K did not consistently increase forage production. There was little movement of K below 25 cm in either soil when K rates of 56 to 596 kg/ha/yr were repeated yearly for up to three years. 2047

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“…In southern Europe, K fertilizer is typically applied once a year as a single application during the winter, at a rate of 200 to 300 kg ha –1 yr –1 of K 2 O (Lloveras et al, 2001; Parrini and Bonari, 2002). However, split applications of K can reduce alfalfa plants’ tendency for luxury consumption and are considered more efficient than a one‐time application of a large amount of K (Kresge and Younts, 1962; Kafkafi et al, 1977). In particular, Kafkafi et al (1977) recommended to use split applications of K in soils having low cation exchange capacity (e.g., 5.5 cmol c kg –1 ).…”

mentioning

confidence: 99%

Phosphorus and Potassium Fertilizer Effects on Alfalfa and Soil in a Non‐Limited Soil

et al. 2013

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Fertilization strategies for high‐yielding alfalfa (Medicago sativa L.) should take in account the increase in soil nutritional status that occurred during the last decades in areas with intensive agricultural use. A field study was conducted at the University of Padova, northeastern Italy, to determine the response of alfalfa yield and nutritive value to various combinations of P and K rates in a soil lacking nutrient deficiency. Alfalfa cultivar Delta was seeded in March 2005 on a silt loam soil having 38 mg kg–1 available P and 178 mg kg–1 exchangeable K. Nine treatments deriving from the combination of three P fertilization rates (0, 100, and 200 kg ha–1 P2O5) and three K rates (0, 300, and 600 kg ha–1 K2O) were compared in a randomized complete block design. Plots were harvested at bud stage during three growing seasons (2005–2007) and dry matter (DM) yield, forage nutritive value, P and K contents, canopy height, and stem density were measured at each harvest. Soil samples were collected at the end of the research period for determination of available P and exchangeable K. The results demonstrated that P application had no impact on yield and did not interact with K in determining productivity, while K had a positive effect on yield. However, the 300 kg ha–1 K2O rate appeared sufficient to maximize yield, without adverse effects on the forage nutritive value. Data from soil analyses showed that alfalfa has a high K uptake even when it is fertilized at high rates.

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Effect of Various Rates and Frequencies of Potassium Application on Yield and Chemical Composition of Alfalfa and Alfalfa‐Orchardgrass¹

Cited by 27 publications

References 0 publications

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹

Potassium fertilization effects on yield and longevity of established alfalfa

Phosphorus and Potassium Fertilizer Effects on Alfalfa and Soil in a Non‐Limited Soil

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Effect of Various Rates and Frequencies of Potassium Application on Yield and Chemical Composition of Alfalfa and Alfalfa‐Orchardgrass1

Cited by 27 publications

References 0 publications

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska1

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska1

Potassium fertilization effects on yield and longevity of established alfalfa

Phosphorus and Potassium Fertilizer Effects on Alfalfa and Soil in a Non‐Limited Soil

Contact Info

Product

Resources

About

Effect of Various Rates and Frequencies of Potassium Application on Yield and Chemical Composition of Alfalfa and Alfalfa‐Orchardgrass¹

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹

Effect of Potassium Rate and Source on Yield and Composition of Bromegrass in Alaska¹