Exponential fertilization promotes seedling growth by increasing nitrogen retranslocation in trembling aspen planted for oil sands reclamation

Pokharel, Prem; Chang, Scott X.

doi:10.1016/j.foreco.2016.03.034

Cited by 25 publications

(14 citation statements)

References 47 publications

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“…Among species there is often a strong positive correlation between maximum rates of photosynthesis and N [42]. Greater application of N fertilizer and greater allocation of N to metabolically active tissues, such as leaves and new stems, in the previous study promoted P n by increasing LAI and chlorophyll concentration of leaves, which, in turn, supported better plant growth [43]. There was also a strong connection between P and the maximum rate of photosynthesis [44]; a partial explanation may lie in a positive relationship between the concentration of P and the amount of Rubisco.…”

Section: Discussionmentioning

confidence: 91%

The Effects of Fertilization on the Growth and Physiological Characteristics of Ginkgo biloba L.

Guo

et al. 2016

Forests

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Ginkgo biloba L. is one of the most extensively planted and productive commercial species in temperate areas around the world, but slow-growth is the most limiting factor for its utilization. Fertilization is one of the key technologies for high quality and high forest yield. To better understand the impacts of fertilization on Ginkgo productivity, the effects of fertilization treatments (single fertilizer and combined fertilizer) on growth, nutrient content in Ginkgo leaves, and photosynthesis characteristics were studied in a 10-year-old Ginkgo plantation over two years. The single factor experiments suggested that DBH (diameter at breast height), H (height), NSL (length of new shoots), and V (trunk volume) showed significant differences between the different levels of single nitrogen (N) or phosphate (P) fertilizer application. Orthogonal test results showed that the nine treatments all promoted the growth of Ginkgo, and the formula (N: 400 g·tree −1 , P: 200 g·tree −1 , potassium (K): 90 g·tree −1 ) was the most effective. G s (stomatal conductance) and P n (net photosynthesis rate) showed significant differences between the different amounts of single N or P fertilizer application, while single K fertilizer only affected P n . Combined N, P, and K fertilizer had significant promoting effects on C i (intercellular CO 2 concentration), G s and P n . N and P contents in Ginkgo leaves showed significant differences between the different amounts of a single N fertilizer application. A single P fertilizer only improved foliar P contents in Ginkgo leaves. A single K fertilizer application improved N and K content in Ginkgo leaves. The effects of different N, P, and K fertilizer treatments on the nutrient content of Ginkgo leaves were different.

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Section: Discussionmentioning

confidence: 91%

The Effects of Fertilization on the Growth and Physiological Characteristics of Ginkgo biloba L.

Guo

et al. 2016

Forests

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“…Nitrogen (N) and phosphorus (P) are two important nutrients whose previous-year uptake and overwinter storage may affect CYS growth in the next spring (Hawkins & Henry 1999, Fernandez et al 2007, Oliet et al 2009. Several studies have demonstrated the positive effect of previous nursery fertilization (e.g., exponential and late-season fertilization) on CYS growth in transplanted trees, which enhanced mineral storage and promoted nutrient retranslocation (Oliet et al 2011, Wei et al 2013, Pokharel & Chang 2016. Recently, Wei et al (2013) and Zhu et al (2016aZhu et al ( , 2016b found that an extended photoperiod can promote growth and biomass accumulation in slow-growth tree seedlings, but resulted in the dilution of inherent N and P storage.…”

Section: Introductionmentioning

confidence: 99%

Chitosan oligosaccharide addition affects current-year shoot of post-transplant Buddhist pine (Podocarpus macrophyllus) seedlings under contrasting photoperiods

Wang¹,

Zhao²,

Wei³

2017

iForest

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(2) Chitosan oligosaccharides (COS) have been used as modifiers to promote growth and mineral nutrient utilization in crop plants, but its over-year effect on current-year shoot (CYS) of juvenile trees is still unclear. In this study, Buddhist pine (Podocarpus macrophyllus) seedlings were cultured under natural and extended photoperiods with or without COS addition for one year. In the following spring, parameters of leaf length, biomass accumulation, and N content in CYS were found to be increased by COS addition under the extended photoperiod. P concentration of COS-treated seedlings was lower under longer photoperiod, but both N and P concentrations were negatively correlated with leaf length and biomass accumulation, suggesting the utilization of N and P for growth demand of CYS. The sole addition of COS mainly resulted in wholeplant P accumulation. However, when combined with the extended photoperiod, COS addition showed over-year effect on biomass accumulation and N content in CYS of transplanted Buddhist pine seedlings. Further studies are needed to confirm these results on other tree species.

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“…Weeding and fertilization are the most common of these practices around the world for tree species such as Populus spp. (Pokharel and Chang 2016), Eucalyptus spp. (Carrero et al 2018), Pinus banksiana (Pokharel et al 2017), Cunninghamia lanceola (Wang et al 2008) and Phyllostachys edulis (Li et al 2016;Song et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Effects of weeding and fertilization on soil biology and biochemical processes and tree growth in a mixed stand of Dalbergia odorifera and Santalum album

Zhang

Xue

et al. 2021

J. For. Res.

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In southern China, the eucalyptus plantation industry has been severely restricted by government policy over concerns on negative environmental impacts. In its place, large-scale plantations of high-value tropical tree species such as nitrogen-fixing Dalbergia odorifera and hemiparasite Santalum album have been widely cultivated including in mixed-species plantations. However, despite their poor growth, little information is available on suitable silvicultural practices of these plantations. Therefore, we subjected an 8-year-old mixed stand of D. odorifera and S. album to weeding, fertilization, weeding + fertilization, or no (CK) treatments and measured soil microbial biomass, respiration, nutrients, nitrogen mineralization and leaching and tree growth and litter production. Weeding and fertilization decreased microbial biomass but increased soil respiration, inhibited mineralization, had not effect on leaching of soil nitrogen, and improved the nutrient status of plantation soil. All practices improved the growth of D. odorifera. In the mixed plantation, fertilization increased litter production and nutrient content, but weeding and weeding + fertilization decreased growth of S. album and litter production in mixed plantation because weeding decreased the number of S. album haustoria in underground plant roots. In conclusion, fertilization is recommended; however, weeding-related practices are inappropriate for D. odorifera and S. album mixed plantations. These conclusions have important implications for managing other parasite or mixed-species plantations.

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Exponential fertilization promotes seedling growth by increasing nitrogen retranslocation in trembling aspen planted for oil sands reclamation

Cited by 25 publications

References 47 publications

The Effects of Fertilization on the Growth and Physiological Characteristics of Ginkgo biloba L.

The Effects of Fertilization on the Growth and Physiological Characteristics of Ginkgo biloba L.

Chitosan oligosaccharide addition affects current-year shoot of post-transplant Buddhist pine (Podocarpus macrophyllus) seedlings under contrasting photoperiods

Effects of weeding and fertilization on soil biology and biochemical processes and tree growth in a mixed stand of Dalbergia odorifera and Santalum album

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