Influence of herbaceous and woody vegetation control on seedling microclimate, leaf gas exchange, water status, and nutrient relations of Pinus strobus L. seedlings planted in a shelterwood

Parker, William C.; Pitt, Doug; Morneault, Andrée E.

doi:10.1016/j.foreco.2012.01.042

Cited by 12 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Understory vegetation was indicated as a competitor of resources in the field, and controlling understory vegetation could increase nutrient concentrations of planted seedlings [14]. Contrary to previous reports, our results showed that removing understory vegetation and associated litter had no effect on seedling [N] and [P].…”

Section: Discussioncontrasting

confidence: 99%

“…As for the introduced seedlings in the understory, removal of existing understory vegetation may be beneficial for seedling growth due to reducing competition for resources such as light and soil nutrients. For example, Parker et al (2012) demonstrated that controlling herbaceous vegetation can increase leaf [N] and [P] of eastern white pine [14] . However, such treatment effects may differ depending on the variation of understory vegetation type and the intrinsic trait of introduced species.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Understory Vegetation and Litter on Plant Nitrogen (N), Phosphorus (P), N∶P Ratio and Their Relationships with Growth Rate of Indigenous Seedlings in Subtropical Plantations

et al. 2013

View full text Add to dashboard Cite

Establishing seedlings in subtropical plantations is very important for forest health, succession and management. Information on seedling nutrient concentrations is essential for both the selection of suitable indigenous tree species to accelerate succession of the established plantation and sustainable forest management. In this study, we investigated the concentrations of nitrogen ([N]), phosphorus ([P]), and N∶P ratio in leaves, stems and roots of seedlings of three indigenous tree species (Castanopsis chinensis, Michelia chapensis and Psychotria rubra) transplanted with removing or retaining understory vegetation and litter at two typical subtropical forest plantations (Eucalyptus plantation and native species plantation). We also measured the relative growth rate (RGR) of seedling height, and developed the relationships between RGR and leaf [N], [P] and N∶P ratio. Results showed that treatments of understory vegetation and associated litter (i.e. removal or retained) generally had no significant effects on leaf [N], [P], N∶P ratio and RGR of the transplanted tree seedlings for the experimental period. But among different species, there were significant differences in nutrient concentrations. M. chapensis and P. rubra had higher [N] and [P] compared to C. chinensis. [N] and [P] also varied among different plant tissues with much higher values in leaves than in roots for all indigenous species. RGR of indigenous tree seedlings was mostly positively correlated with leaf [N] and [P], but negatively correlated with leaf N∶P ratio. Considering the low [P] and high N∶P ratio observed in the introduced indigenous tree seedlings, we propose that the current experimental plantations might be P limited for plant growth.

show abstract

Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Understory Vegetation and Litter on Plant Nitrogen (N), Phosphorus (P), N∶P Ratio and Their Relationships with Growth Rate of Indigenous Seedlings in Subtropical Plantations

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Past studies of the effects of competition on tree growth have shown crop-tree stem diameter to be the best allometric indicator of competition for growing resources, with stem height and mortality being comparatively invariant in all but the more extreme competition levels [45]. In this study, planted pine stem diameters responded strongly and positively to the increased light, soil moisture and nutrient availability associated with both herbaceous and woody vegetation control (Figure 2; [29,30,32]). Close examination of the stem diameter response surfaces reveals clear similarities between the clearcut (Figure 2a) and the NB shelterwood (Figure 2b), suggesting comparative competitive environments at these sites, despite large differences in overtopping residual cover ( Figure 6).…”

Section: The Three Sites In Perspectivementioning

confidence: 51%

“…Since seedlings exposed to full sunlight on the clearcut sustained high incidence of weevil attack, our preliminary recommendations focused on the proactive, early suppression of herbaceous vegetation to reduce competition for soil moisture and nutrients [31]. The two shelterwood environments proved just as competitive as the clearcut, but sunlight was often the most limiting resource, given that the mature overstories intercepted substantial available quantities of light [32]. Our 6th-year recommendations from these shelterwoods emphasized thinning of mature stands from below to allow 50% to 60% of full sunlight into the understory (something that was not being done consistently in operations of the time), followed by the proactive, early suppression of both woody and herbaceous vegetation to maintain optimum light levels and reduce competition for soil moisture and nutrients [33].…”

Section: Introductionmentioning

confidence: 99%

Optimum Vegetation Conditions for Successful Establishment of Planted Eastern White Pine (Pinus strobus L.)

Pitt

Hoepting

Parker

et al. 2016

Forests

View full text Add to dashboard Cite

The 10th-growing season performance of planted eastern white pine (Pinus strobus L.) seedlings was evaluated in response to herbaceous and woody vegetation control treatments within a clearcut and two variants of the uniform shelterwood regeneration system (single vs. multiple future removal cuts). Herbaceous vegetation control involved the suppression of grasses, forbs, ferns and low shrubs for the first 2 or 4 growing seasons after planting. Deciduous woody vegetation control treatments, conducted in combination with the herbaceous treatments within a response-surface design, involved the permanent removal of all tall shrubs and deciduous trees at the time of planting, at the end of the 2nd or 5th growing seasons, or not at all. In general, the average size of planted pine was related positively to the duration of herbaceous vegetation control and negatively to delays in woody control. White pine weevil (Pissodes strobi Peck) altered these trends, reducing the height of pine on plots with little or no overtopping deciduous woody vegetation or mature tree cover. Where natural pine regeneration occurred on these plots, growth was similar but subordinate to the planted pine. Data from the three sites indicate that at least 60% of planted pine may be expected to reach an age-10 height target of 2.5 m when overtopping cover (residual overstory + regenerating deciduous) is managed at approximately 65% ± 10%, and total herbaceous cover is suppressed to levels not exceeding 50% in the first five years. On productive sites, this combination may be difficult to achieve in a clearcut, and requires fairly rigorous vegetation management in shelterwood regeneration systems. Currently, synthetic herbicides offer the only affordable and effective means of achieving such vegetation control.

show abstract

White pine (Pinus strobus L.) regeneration dynamics at the species’ northern limit of continuous distribution

2013

View full text Add to dashboard Cite

Influence of herbaceous and woody vegetation control on seedling microclimate, leaf gas exchange, water status, and nutrient relations of Pinus strobus L. seedlings planted in a shelterwood

Cited by 12 publications

References 36 publications

Effects of Understory Vegetation and Litter on Plant Nitrogen (N), Phosphorus (P), N∶P Ratio and Their Relationships with Growth Rate of Indigenous Seedlings in Subtropical Plantations

Effects of Understory Vegetation and Litter on Plant Nitrogen (N), Phosphorus (P), N∶P Ratio and Their Relationships with Growth Rate of Indigenous Seedlings in Subtropical Plantations

Optimum Vegetation Conditions for Successful Establishment of Planted Eastern White Pine (Pinus strobus L.)

White pine (Pinus strobus L.) regeneration dynamics at the species’ northern limit of continuous distribution

Contact Info

Product

Resources

About