Skip to Main Content
Phosphorus Fertilizer Rate, Soil P Availability, and Long-Term Growth Response in a Loblolly Pine Plantation on a Weathered UltisolAuthor(s): D. Andrew Scott; Christine M. Bliss
Source: Forests 3(4):1071-1085
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
PDF: Download Publication (119.69 KB)
DescriptionPhosphorus is widely deficient throughout the southern pine region of the United States. Growth responses to P fertilization are generally long-lasting in a wide range of soil types, but little is known about fertilization rates and long-term P cycling and availability. In 1982, exceptionally high P fertilization rates (0, 81, 162, and 324 kg P ha-1) were applied to a loamy Ultisol in central Louisiana, USA. We measured vegetation responses at age 27 years and sequentially extracted soil P to 1 m to elucidate potential P availability into the next rotation. Loblolly pine responded well to the lowest fertilization rate; total biomass was 39% greater in the fertilized plots compared to the unfertilized plots, but higher fertilization rates had no effect, presumably due to induced N-limitations. What little fertilizer P was found in the soils was in the moderately labile NaOH fraction in the surface 20 cm, and may be slowly available to the next pine rotation. Normal rates of P fertilizer will maintain elevated available P well into a second rotation in loamy Pleisteocene Ultisols of the western Gulf Coastal Plain. Exceptionally high rates were not effective at increasing potentially available P beyond normal rates.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationScott, D. Andrew; Bliss, Christine M. 2012. Phosphorus fertilizer rate, soil P availability, and long-term growth response in a loblolly pine plantation on a weathered Ultisol. Forests. 3(4):1071-1085.
Keywordsloblolly pine, phosphorus fertilization, phosphorus fractionation
- Nitrogen distribution within the soil-plant-microbial system in response to pre-thinning fertilization treatments in Louisiana
- Site Preparation and Fertilization Effects on Growth of Slash Pine for Two Rotations
- Effects of pine sawdust, hardwood sawdust, and peat on bareroot soil properties
XML: View XML