Alfalfa cultivar response to phosphorus and potassium deficiency: Elemental composition of the herbage

James, David W.; Hurst, C. J.; Tindall, T. A.

doi:10.1080/01904169509365076

Cited by 29 publications

(9 citation statements)

References 15 publications

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“…Average P and Ca concentrations in the herbage were not significantly affected by increasing K rates (Table 2). A linear decrease in Mg concentrations, however, was seen with K fertilization rates, as has been reported in other studies (Smith, 1975; Rominger et al, 1976; James et al, 1995). The observed P, Ca, and Mg concentration values were similar to those of other studies conducted in the Ebro Valley and in the USA (Heras and Montañes, 1974; Smith, 1975; Sheaffer et al, 1986; James et al, 1995).…”

Section: Resultssupporting

confidence: 87%

Potassium Fertilization Effects on Alfalfa in a Mediterranean Climate

et al. 2001

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kg Ϫ1 , using short-season dormant or semidormant cultivars with reported annual DM yields of alfalfa that Potassium fertilization rates for alfalfa (Medicago sativa L.) have ranged generally between 10 and 15 Mg ha Ϫ1 in three been increasing with intensive cropping systems or decreasing with policies that generally lead to reduced fertilizer inputs. In this case, to four harvests per season (Markus and Battle, 1965; nutrient buildup or maintenance of high soil test levels may not be Lutz, 1973; Smith, 1975; Rominger et al., 1976; Fixen desirable and drawdown of K reserves may be beneficial in the short and Ludwick, 1983; Barbarick, 1985; Alva et al., 1986; term. The objective of this research was to evaluate the effects of Sheaffer et al., 1986; Burmester et al., 1991; Razmjoo potassium fertilization of alfalfa in areas of high soil exchangeable K and Henderlong, 1997). The reported results of these levels and long growing seasons. A field experiment was established trials show that the effects to the applications of K varied under irrigation from 1993 to 1997 in the Mediterranean environment with production practices, growing conditions, and soil of the Ebro Valley (Spain) on a silty clay loam soil. The treatments K contents, ranging from no DM yield response with were five annual rates of K (0, 41.5, 83, 166, and 332 kg K ha Ϫ1 ) and the application of 300 kg K ha Ϫ1 with a soil test level two rates of K (166 and 332 kg K ha Ϫ1 ) applied prior to seeding on of 75 mg K kg Ϫ1 (Lutz, 1973) to a maximum response two alfalfa cultivars. The average annual dry matter (DM) yield was 21.5 Mg ha Ϫ1 and showed a small linear response to K fertilization with the application 448 kg K ha Ϫ1 for a soil with extract-(Pr Ͼ F ϭ 0.0589). Total K removal in the herbage increased linearly able K of 55 mg K kg Ϫ1 (Rominger et al., 1976). These with each rate of K and reached 1728 kg K ha Ϫ1 with the application studies show that in general, K application increased of 332 kg K ha Ϫ1 yr Ϫ1 , compared with 1546 kg K ha Ϫ1 without K plant and soil K concentrations. fertilization. At the end of the experiment, soil ammonium acetateAlthough a survey of soil fertility and forage manageextractable K (K e ) increased little with K rates, and the differences ment specialists indicates that additional K is rarely were observed only in the first 30 cm of depth. Despite the uptake recommended when the concentration of exchangeable of 1546 kg K ha Ϫ1 , soil K e values did not change appreciably, suggesting K is greater than 300 kg ha Ϫ1 (about 150 mg K kg Ϫ1 ) in that much of the K uptake was derived from the fertilizer and from

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Section: Resultssupporting

confidence: 87%

Potassium Fertilization Effects on Alfalfa in a Mediterranean Climate

et al. 2001

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“…Literature sources report on interactions occurring between magnesium and the following elements: nitrogen [32][33][34][35], phosphorus [32,[36][37][38][39], potassium [32,40] and calcium [41][42][43][44]. There is a positive synergistic effect of plant nutrition with magnesium on the accumulation of nitrogen in plants [45], which is confirmed by the determinations of relationships between these nutrients in case of onion leaves.…”

Section: Chemical Analyses Of Plantsmentioning

confidence: 56%

Effect of Magnesium Nutrition of Onion (Allium cepa L.). Part I. Yielding and Nutrient Status

Kleiber¹,

Golcz²,

Krzesiński³

2012

Ecological Chemistry and Engineering S

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Magnesium (Mg) serves specific physiological functions in plants, as it participates in 250÷400 processes and may not be replaced by other elements, even those exhibiting similar physicochemical properties, such as Co 2+ , Mn 2+ or Ni 2+ . The aim of the conducted studies was to optimize magnesium nutrition of onion (Allium cepa L.), through the evaluation of yielding of plants, and to determine its effect on contents of the following elements in leaves and bulbs: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). Magnesium was applied in the quick-acting form, MgSO4·7H2O, based on the chemical analyses of soil, in doses corresponding to 50, 100, 150 and 200 mg Mg·dm -3 soil. The other nutrients were supplemented to standard levels recommended for the cultivation of onion, amounting to (in mg·dm -3 soil) 150 N, 80 P and 200 K. Magnesium nutrition was found to have a positive effect on yielding of onion and its quality. Significantly the highest total yield (4.85 kg·m -2 ) and merchantable yield (4.78 kg·m -2 ) were obtained when applying Mg-100, which amounted to an increase by 38% and 45% in comparison with the control combination. Plant nutrition with magnesium in case of leaves significantly affected an improvement of their nutrient status for nitrogen, deterioration of calcium nutrition, while in case of leaves and bulbs that of potassium. Analyzed levels of magnesium nutrition had a significant effect on nutrient status of leaves and bulbs for this nutrient. Leaves accumulated more nitrogen, potassium, calcium and magnesium than bulbs. Controlled magnesium nutrition of plants is an effective method of biofortification of onion with this nutrient.

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“…Significant positive correlations of seed cotton yield with the plant P concentration (R 2 = 0.56; P ≤ 0.01), and of wheat grain yield with plant P concentration (R 2 = 0.66; P ≤ 0.01; data not shown) testify that yield of both crops depended on and proportionate to P contents in the plant diagnostic part, i.e., 4th leaf from the top on main stem at flowering initiation growth stage for cotton and top two leaves at head emergence growth stage for wheat. Published data also reveals that plant responses were correlated with soil extractable level of nutrients (James et al, 1995;Lloveras et al, 2004). The application of treatments BNM to BNM + GM improved P uptake by both crops, as verified by larger quantities of P contained in harvested crop plant parts (Tables 1 and 2).…”

Section: Discussionmentioning

confidence: 79%

Nutrient Balances as Affected by Integrated Nutrient and Crop Residue Management in Cotton-Wheat System in Aridisols. Ii. Phosphorus

Rafique

Mahmood‐ul‐Hassan

Rashid

et al. 2012

Journal of Plant Nutrition

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2 Impact of integrated nutrient and crop residue management on crop productivity, phosphorus (P) uptake and apparent P balances was investigated in a 5-year field experiment on two calcareous soils, i.e., Awagat (coarse loamy) and Shahpur (fine silty) in cotton-wheat sequence. Minimum mean P uptake (kg ha −1 ) by cotton with Farmers' Fertilizer Use (FFU) treatment was 8.89 in Awagat and 11.54 in Shahpur soil. Corresponding maximum mean P uptake was 15.30 and 17.01 kg ha −1 with Integrated Nutrient Management (INM), respectively. Nutrient treatments effect on P uptake by wheat was similar to cotton. Phosphorus uptake was further enhanced by crop residue recycling. Phosphorus uptake trend by cotton was negative under FFU without residue recycling and was positive with residue recycling. While P uptake trends were positive under all other treatments. INM yielded positive apparent P balances (kg ha −1 ) of 56 -306 in Awagat and 24 -288 in Shahpur soil.

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Alfalfa cultivar response to phosphorus and potassium deficiency: Elemental composition of the herbage

Cited by 29 publications

References 15 publications

Potassium Fertilization Effects on Alfalfa in a Mediterranean Climate

Potassium Fertilization Effects on Alfalfa in a Mediterranean Climate

Effect of Magnesium Nutrition of Onion (Allium cepa L.). Part I. Yielding and Nutrient Status

Nutrient Balances as Affected by Integrated Nutrient and Crop Residue Management in Cotton-Wheat System in Aridisols. Ii. Phosphorus

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