Impact of Long‐Term Phosphorus and Potassium Fertilization on Alfalfa Nutritive Value–Yield Relationships

Lissbrant, Sofia; Stratton, S. D.; Cunningham, Suzanne M.; Brouder, Sylvie M.; Volenec, Jeffrey J.

doi:10.2135/cropsci2008.06.0333

Cited by 32 publications

(47 citation statements)

References 35 publications

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“…These results differ from those of Lissbrant et al (2009), who reported a significant increase in CP with the addition of P, and a reduction in CP with the addition of K. In the current study, the significant increase in CP was observed only with combined P, K and Zn and/or combined P, K, S and Zn. Low levels of P, K, S and Zn in the plants may have limited the synthesis of enzymes responsible for the reduction of inorganic nitrogen into amino acids.…”

Section: Discussioncontrasting

confidence: 99%

Fertiliser management for higher productivity of established lucerne pasture

Grewal

2010

New Zealand Journal of Agricultural Research

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Lucerne (Medicago sativa L.), a deep-rooted perennial legume forage, is a significant part of pastures, and is also grown in rotation with wheat to improve the yield and protein content of grains. Adequate supply of key nutrients is one of the important factors in higher productivity and sustainability of lucerne pastures. However, farmers mostly overlook the importance of nutrient management of established lucerne pastures, resulting in poor persistence, low productivity and weed invasion. The aim of this on-farm field study was to investigate the effects of the combined use of P, K, S and Zn and different sources of Zn on herbage yield, crude protein, nutrient composition, nitrogen fixation, weed invasion and persistence of an established (2 years old) stand of 'Aurora' lucerne pasture. A randomised block design was used to test ten fertiliser treatments. The combined use of P, K, S and Zn significantly (PB0.05) increased herbage yield (139% increase) over 2 years, nitrogen fixation, leaf-to-stem ratio, crude protein, nutrient composition (P, K, Ca, S, Zn concentrations), persistence and groundcover, and also led to significant weed suppression (weed biomass decreased from 53 to 69%). Of the three forms of zinc tested, zinc sulphate and zinc-coated single superphosphate proved superior to zinc oxide. The results suggest that nutrient management is essential for improved persistence, reduced weed invasion and higher sustainable productivity of established lucerne pastures, which is important for livestock production systems and overall profitability of farming systems.

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Section: Discussioncontrasting

confidence: 99%

Fertiliser management for higher productivity of established lucerne pasture

Grewal

2010

New Zealand Journal of Agricultural Research

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“…Higher DMY in 2013 and 2014 correspond with Raza et al (2013) who described positive relationship between lucerne yield and soil water content with respect to root distribution over the soil profile. Higher yield of the first cut in the HY2 was in accordance with Lissbrant et al (2009) who reported the greatest yield in the HY2. In our study, absence of third cut in the HY2 caused the significantly lower annual DMY.…”

Section: Discussionsupporting

confidence: 88%

“…P and K fertilization generally increases lucerne yield and stand persistence (Berg et al 2005). According to Lissbrant et al (2009), DMY increased when 25 kg P per hectare was applied but higher rates did not further increase yield. It is in line with no significant differences between P 1 K 1 and P 2 K 2 treatment in present experiment.…”

Section: Discussionmentioning

confidence: 99%

“…As was noted by Berg et al (2005), direct P and K fertilization was consistently associated with greater mass of individual shoots. Low P and K soil fertility reduced fibre concentrations in the forage (Lissbrant et al 2009) as well as persistence and productivity (Berg et al 2007). As was highlighted by Chmelíková et al (2015), holistic analysis including above-and belowground traits should be used for the evaluation of fodder crops.…”

Section: Discussionmentioning

confidence: 99%

“…High forage yield and quality is a goal of lucerne (Medicago sativa L.) producers because these factors impact profitability of forage production (Lissbrant et al 2009). There are many external factors affecting lucerne forage production such as climate, soil as well as applied growing management (Hakl et al 2014).…”

mentioning

confidence: 99%

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Impact of long-term organic and mineral fertilization on lucerne forage yield over an 8-year period

Hakl¹,

Kunzová²,

Konečná³

2016

Plant Soil Environ.

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Effects of direct fertilization on lucerne (Medicago sativa L.) forage yield have been widely investigated; however there is a lack of published studies investigating the long-term effect of indirect application of mineral and organic fertilization. The main objective of the present research was therefore to investigate differences in forage yield under different combinations of mineral (6 treatments) and organic (3 treatments) fertilization over the past 8 years of long-term experiment conducted since 1955 in Ruzyně. Long-term absence of fertilization provided average annual dry matter yield of 8.64 t/ha. Indirect application of single manure or slurry significantly increased yield to 9.68 and 9.37 t/ha, respectively. Absence of mineral fertilization provided yield of 9.23 t/ha across organic fertilization and an inconsistent effect of the increase of indirectly applied nitrogen (N) rate was observed. The highest yields over 10 t/ha were observed at treatments where combinations of organic fertilization with higher rates of N, phosphorus (P) and potassium (K) were applied. The trend for yield reduction was observed under increasing N rates within identical P and K fertilization. This research has shown that indirect effect of fertilization should be considered together with stand age when lucerne forage yield is evaluated.

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Influence of potassium fertilization on alfalfa leaf and stem yield, forage quality, nutrient removal, and plant health

Heuschele¹,

Gamble²,

Vetsch

et al. 2023

Agrosystems Geosci & Env

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Potassium (K) is an essential nutrient for plant growth. In K-deficient soils, fertilization has been shown to increase herbage yield of alfalfa. The purpose of this study was to determine the effects of K fertilization on alfalfa leaf and stem yield, forage quality, nutrient removal, and plant health of a nonlodging experimental germplasm. Five alfalfa rotations had K fertilizer applied at three rates (0, 186, and 372 kg K ha −1 ) to soils already containing sufficient soil test K (223 mg kg −1 ). No overall yield differences were found related to K application rates, though K removal in total herbage increased by 30-58% with K fertilization, depending on alfalfa stand age. Leaf:stem ratios were not impacted by K fertilization. The concentrations of B, Ca, and Na decreased with K fertilization, while K concentrations increased, which may have resulted in B deficiencies. Leaf in vitro digestibility decreased significantly with the application of K. There was no benefit to crown rot disease resistance with increased K fertilization. This study supports that the addition of K to already sufficient soils does not lead to any additional economic benefits and may reduce productivity due to the reduction of B uptake and in vitro digestibility.

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Impact of Long‐Term Phosphorus and Potassium Fertilization on Alfalfa Nutritive Value–Yield Relationships

Cited by 32 publications

References 35 publications

Fertiliser management for higher productivity of established lucerne pasture

Fertiliser management for higher productivity of established lucerne pasture

Impact of long-term organic and mineral fertilization on lucerne forage yield over an 8-year period

Influence of potassium fertilization on alfalfa leaf and stem yield, forage quality, nutrient removal, and plant health

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