Abstract
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 P 2 O 5 ) and three K rates (0, 300, and 600 kg ha –1 K 2 O) 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 K 2 O 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.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
P application was associated with no impact in alfalfa yield.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- P applicatione0
- Outcome
- yielde0
- Direction
- no impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P application had no impact on yield”
t0“Alfalfa”
Claim · model-written summary
P application was associated with did not interact in alfalfa productivity.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- P applicatione1
- Outcome
- productivitye0
- Direction
- did not interacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not interact with K in determining productivity”
t0“Alfalfa”
e1“P application had no impact on yield”
Claim · model-written summary
K was associated with positive effect in alfalfa yield.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Ke0
- Outcome
- yielde0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K had a positive effect on yield”
t0“Alfalfa”
Claim · model-written summary
300 kg ha –1 K 2 O was associated with maximize in alfalfa yield.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- 300 kg ha –1 K 2 Oe0
- Outcome
- yielde0
- Direction
- maximizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 300 kg ha –1 K 2 O rate appeared sufficient to maximize yield”
t0“Alfalfa”
Claim · model-written summary
300 kg ha –1 K 2 O was associated with without adverse effects in alfalfa forage nutritive value.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- 300 kg ha –1 K 2 Oe1
- Outcome
- forage nutritive valuee0
- Direction
- without adverse effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without adverse effects on the forage nutritive value”
t0“Alfalfa”
e1“the 300 kg ha –1 K 2 O rate appeared sufficient to maximize yield”
Claim · model-written summary
fertilized at high rates was associated with high in alfalfa K uptake.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- fertilized at high ratese0
- Outcome
- K uptakee0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alfalfa has a high K uptake even when it is fertilized at high rates”
t0“Alfalfa”
The same questions in other papers
potassium · yield · Medicago sativa (alfalfa)Results differ
29 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
34 papers more in this group
See all 38 papers →phosphorus · yield · Medicago sativa (alfalfa)Results differ
13 papers in the same direction as this paper · 54 in the opposite direction
- positive
- positive
- positive
64 papers more in this group
See all 68 papers →fertilization · nutrient: content · Medicago sativa (alfalfa)Positive and negative results
48 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
55 papers more in this group
See all 59 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.