The roles of nitrogen and phosphorus in increasing productivity of western hemlock and western redcedar plantations on northern Vancouver Island

Influence of Irrigation, Soil and Weeding on Performance of Mediterranean Cypress Seedling in Nursery

“…Shahini (1996) found the better growth of pot-planted Cupressus seedlings in soils containing organic matter (30% peat moss). The similar finding was detected in work Ahmadloo et al (2009) (2000), Salifu and Timmer (2001) and Blevins et al (2006), too. This is seemingly due to proper aeration and water content in soil and easiness in absorption of nutritional elements by plant (Shibu et al, 2006).…”

Mid-rotation response to fertilizer by Pinus radiata D. Don at three contrasting sites

“…However, there was no significant response to N or P alone in these trials. Blevins et al (2006) reported long-term growth responses (15 years) related with the effects of including P in the fertilizer on western red cedar and western hemlock regenerating on cedar-hemlock sites. Their results indicated that western hemlock did not respond to a second application of N unless P had been applied at least once.…”

“…Blevins et al (2006) found that Tsuga heterophylla (Rafinesque) Sargent stands that received N alone increased individual tree growth approximately fourfold during the first 4 years after application. Although growth response to the first application of P alone was not as large as to N alone, P fertilization seems to have induced a longer duration of response by 10-15 years (a type A response).…”

Effects of nitrogen and phosphorus supply on growth and physiological traits of two Larix species

“…Menge and Field (2007) found that N fertilization led to P limitation in six out of eleven previously N-limited ecosystems, mainly because N input could accelerate P cycling rates across a wide variety of terrestrial ecosystems (Marklein and Houlton, 2012). Nevertheless, most investigations on P fertilization have been conducted in N-rich Yavitt et al, 2011;Santiago et al, 2012;Mori et al, 2013) or P-limited conditions (De Groot et al, 2003;Wright et al, 2005), while only few studies have investigated how P fertilization influences productivity in N-limited ecosystems (Blevins et al, 2006;Carlson et al, 2014;Gotore et al, 2014).…”