dc.contributor.author |
Lloveras Vilamanyà, Jaume |
dc.contributor.author |
Chocarro, Cristina |
dc.contributor.author |
Torres, Lluis |
dc.contributor.author |
Viladrich, D. |
dc.contributor.author |
Costafreda, R. |
dc.contributor.author |
Santiveri Morata, Paquita |
dc.date |
2015-03-19T15:06:44Z |
dc.date |
2012-05-00 |
dc.date |
2015-03-19T15:06:44Z |
dc.date |
10000-01-01 |
dc.identifier |
0002-1962 |
dc.identifier |
http://hdl.handle.net/10459.1/48076 |
dc.identifier |
https://doi.org/10.2134/agronj2006.0333 |
dc.identifier.uri |
http://hdl.handle.net/10459.1/48076 |
dc.description |
Potassium fertilization recommendations for alfalfa (Medicago sativaL.) vary depending on the area of production, soil levels, and crop management. The objectives of this study were to determine the impact of K fertilization on irrigated alfalfa yield, yield components, and soil exchangeable K (Ke) values in a Mediterranean climate. A field experiment was conducted during
a period of 4 yr (2002–2006) in Spain, on a soil with moderate levels of Ke(161 mg K kg
–1). The treatments applied were five
annual rates of K (0, 100, 200, 300, and 400 kg K ha–1). Total 4-yr dry matter (DM) yields averaged 74.9 Mg ha–1 without differences between K fertilizer rates, although the unfertilized control produced the lowest DM yields. The 4-yr crop uptake of K reached 1738 kg ha–1
with the application of 400 kg K ha–1yr–1
, and 756 kg K ha–1for the 0 K fertilization. The removal was greater than the K applied. The results suggest that large amounts of K should not be applied to alfalfa because the crop uses
excess K without increasing yield. Soil Ke
concentrations decreased every year for all K rates except for the highest treatmentof 400 kg K ha–1yr–1. Lack of K fertilization did not affect stand density but the shoot weight was the yield component most closely related to K fertilization. |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
American Society of Agronomy |
dc.relation |
Reproducció del document publicat a: https://doi.org/10.2134/agronj2006.0333 |
dc.relation |
Agronomy Journal, 2012, vol. 104, núm. 3, p. 729-734 |
dc.rights |
(c) American Society of Agronomy, 2012 |
dc.rights |
info:eu-repo/semantics/restrictedAccess |
dc.subject |
Cereals |
dc.subject |
Potassi |
dc.subject |
Anàlisi dels sòls |
dc.subject |
Composició dels sòls |
dc.subject |
Farratge |
dc.subject |
Cereals |
dc.subject |
Potassium |
dc.subject |
Soil analysis |
dc.subject |
Soil composition |
dc.subject |
Forage |
dc.title |
Alfalfa yield components and soil potassium depletion as affected by potassium fertilization. |
dc.type |
info:eu-repo/semantics/article |
dc.type |
publishedVersion |