Potassium Nutrition of Alfalfa and Other Forage Legumes: Temperate and Tropical

Lanyon, L. E.; Smith, F. W.

doi:10.2134/1985.potassium.c37

Cited by 9 publications

(6 citation statements)

References 78 publications

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“…In northern Italy, P is commonly applied annually in early winter (December) and the current fertilization rate recommendations range from 40 to 50 kg ha –1 yr –1 of P 2 O 5 (Parrini and Bonari, 2002). Moreover, alfalfa yield, forage nutritive value, and stand density are strongly affected by K nutrition (Wolf et al, 1976; Kafkafi et al, 1977; Lanyon and Smith, 1985). Nevertheless, alfalfa can absorb more K than needed for maximum growth through a behavior called “luxury” consumption, which generally leads to a reduction in protein, Ca, Mg, and Na (Lanyon and Griffith, 1988; Pant et al, 2004).…”

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

et al. 2013

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“…Additionally, manure is rich in organic colloids, which can improve soil structure (Hu et al, 2007) and enzyme activity, further enhancing soil fertility. Adequate K availability in soils and stable K concentrations in plants contribute to alfalfa growth, stress resistance, and overwintering (Munson et al, 1985). K may also help maintain N-fixing enzyme activity, benefiting alfalfa growth (Barbarick, 1985).…”

Section: Variation In Alfalfa Yield and Crude Protein Content Increas...mentioning

confidence: 99%

“…For instance, applying nitrogen (N) fertilizer during early alfalfa establishment can enhance BNF (Hannaway & Shuler, 1993), while phosphorus (P) fertilizer promotes the accumulation of stem and leaf dry matter (Lemaire et al, 2021). Potassium (K) fertilizer regulates physiological and biochemical activities, increasing alfalfa yield (Lanyon & Smith, 1985). Organic fertilizers, such as manure, improve soil conditions and promote alfalfa growth by increasing multiple nutrient availability and supporting microbial activities (Liu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Fertilizer application increases alfalfa yield and crude protein content: roles of fertilizer type, application rate, and environmental conditions

Ben,

Li,

Yang

2023

Preprint

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Insufficient supply of high-quality forage is a critical factor constraining the growth of the livestock industry. Cultivated grasslands, such as alfalfa (Medicago sativa L.) grasslands, play a vital role in addressing this issue. Fertilizer application is an effective strategy for enhancing alfalfa yield and forage quality; however, optimizing management practices is essential for adapting to variable environmental conditions. In this study, we conducted a meta-analysis to evaluate the impact of fertilizer application on alfalfa productivity, taking into account fertilizer type, application rate, and environmental factors. Fertilizer application significantly increased overall alfalfa yield and crude protein content by 17.7% and 5.8%, respectively, compared to the no-fertilizer group. Manure application contributed to a greater increase in alfalfa yield than phosphorus (P), potassium (K), and nitrogen (N) fertilizers, with increments of 14.0%, 24.9%, and 25.6%. Considering alfalfa yield, quality, and crude protein content, the optimal application rates for N and P fertilizers were found to be 100–150 kg ha− 1 and 150–200 kg ha− 1, respectively. We also found that N and K fertilizers were more effective under lower (≤ 10℃) mean annual temperatures (MATs), while P fertilizer and manure performed better under higher MATs. N fertilizer and manure led to greater yield increases under higher mean annual precipitations (MAPs), whereas P and K fertilizers demonstrated lower use efficacy under the same conditions. Additionally, the application of N, P, and K fertilizers, and manure resulted in higher crude protein content under lower MATs and MAPs. Although soil conditions influenced growth and production, their effects on the fertilization impact of all fertilizers on alfalfa yield and crude protein content were limited. These findings provide valuable insights for the development of optimized fertilizer management strategies by taking into account site-specific differences, environmental factors, and other management practices. Future research should focus on integrating additional forage quality parameters, exploring the synergistic effects of different fertilizers, and evaluating the long-term sustainability of these practices.

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“…Different physiological functions for potassium in forage legumes were found such as, carbohydrate production, enzyme activity, transport and stomata activities Munson (1985). Lanyon and Smith (1985) stated that when the concentration of exchangeable potassium is greater than l50 mg K/Kg in the surface soil, the additional potassium is rarely recommended. The presence of potassium decreased common leaf spot diseases and leaf drop as well as increased the yield, leaf/stem ratio and nodulation in alfalfa.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sowing Dates and Potassium Fertilizer Rates on Seed Yield of Lima Bean CV. (Phaseolus vulgaris L.)

Badawy

Ismail

Salem

2019

Journal of Plant Production

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To investigate the effect of sowing dates and potassium fertilizer rates on seeds yield and yield component of lima bean. Two field experiments were conducted at Sakha Agricultural Research Station during 2015 and 2016 summer seasons. Four sowing dates (1 st May, 15 th May, 30 th May and 15 th June) and potassium fertilizer rates (0, 50, 75, and 100 kg/fed) were used as treatments. The main findings could be summarized as follows:Sowing dates significantly affected seed yield (t/fed), No. of seeds/pod, pod length (cm), No. of pods/plant, pods weight/plant, plant height (cm), stem diameter (cm), No. of branches/plant. Sowing on 1 st May significantly exceeded all studied traits compared with other sowing dates and produced the highest yield (2.477 t/fed), while the lowest sowing date on 15 th June. The stem diameter increased with sowing late (1.810 t/fed.).Potassium fertilizer rates significantly affected on seed yield (t/fed), No. of seeds/pod, pod length (cm) , No. of pods/plant, pods weight (t/ fed), plant height (cm), stem diameter (cm), No. of branches/ plant. The results indicated that the highest lima bean seed yield was 2.375 (t/fed) when fertilized with100kg k 2 o/fed and the lowest at control zero fertilizer 1.990 (t/fed).It could be concluded that early sowing on 1 st May with addition potassium fertilizer rate at 100 kg k 2 o/fed were the recommended treatment to produce the highest seed yield production of lima bean at North Delta under the environmental condition of Kafr EL-Sheikh Governorate.

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Potassium Nutrition of Alfalfa and Other Forage Legumes: Temperate and Tropical

Cited by 9 publications

References 78 publications

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

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

Fertilizer application increases alfalfa yield and crude protein content: roles of fertilizer type, application rate, and environmental conditions

Effect of Sowing Dates and Potassium Fertilizer Rates on Seed Yield of Lima Bean CV. (Phaseolus vulgaris L.)

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