A Loblolly Pine Management Guide: When and Where to Apply Fertilizer

Abstract

I f you are growing l o b l o l l y pine i n p l a n t a t i o n s and you are l o o k i n g f o r a t t r a c t i v e investments i n increased wood production, consider f o r e s t f e r t i l i z a t i o n .-P l a n n i n g f o r f e r t i l i z a t i o n r e q u i r e s months of l e a d t i m e t o o b t a i n s o i l s i n f o r m a t i o n , t o t a k e f o l i a g e samples, and t o have them analyzed.

Long-term trends in loblolly pine productivity and stand characteristics in response to thinning and fertilization in the West Gulf region

“…When drought reduces the acquisition of water and mineral nutrients by roots, less P may be distributed to foliage in the lower crown than the upper crown, or P may be preferentially mobilized from lower crown foliage to support the P needs elsewhere in the crown. Wells and Allen (1985) note that loblolly pine growth rates generally return to prefertilized rates 5-8 years after N addition, and Pritchett and Gooding (1975) suggest that refertilization with P may be required every 15 years on Coastal Plain sites. At our site, high rates of aboveground growth show the potential need for more frequent N and P application than generally recommended.…”

Growth and Soil Nutrient Responses to Stocking Rate and Nitrogen Source for Mid-Rotation Loblolly Pine in West-Central Arkansas~!2010-02-16~!2010-06-17~!2010-07-20~!

“…Adjustments among the fertilizer sources for other macro-and micro-nutrients were not made. [25,26] and analyzed for N as described above.…”

Influencia de la fertilización en la supervivencia y crecimiento de Pinus patula Schiede ex Schltdl. & Cham. en vivero y campo

“…Nine months after planting, the nutrient concentration (N, P and K) of the plants was evaluated. For this purpose, a sample of needles was collected from the middle part of the stems of all the trees of each treatment, according to Wells and Allen (1985), and a composite sample was formed from each treatment of the four blocks of the experimental design in the field, which was placed in properly labeled brown paper bags. Subsequently, the needles were dried in an oven at 70 °C for 72 h. Then, 100 representative needles were selected from each sample and sent to the Nutrition Laboratory of the Colegio de Postgraduados to determine N content by the micro-Kjeldahl method, and P and K by coupled plasma induction optical emission spectrometry (Varian Agilent 725-ES ICP-OES; Mulgrave, Australia), using digestions with a mixture of H 2 SO 4 :HClO 4 (2:1, v:v) according to Alcántar and Sandoval (1999).…”