A moisture strain index for loblolly pine

Byrne, Stephen V.; Wentworth, Thomas R.; Nusser, Sarah M.

doi:10.1139/x87-004

Cited by 13 publications

(7 citation statements)

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“…Decreased predawn pine xylem pressure potential has been previously reported from experiments in which vegetation was removed from young pine stands (Nelson et al 1981, Carter et al 1984, Byrne et al 1987.…”

Section: Discussionmentioning

confidence: 59%

“…Decreased predawn pine xylem pressure potential has been previously reported from experiments in which vegetation was removed from young pine stands (Nel-son et al 1981, Carteret al 1984, Byrne et al 1987. Although these studies suggested that herbaceous plants (Nelson et al 1981) or hardwood and herbaceous plants strongly compete with pine for soil moisture (Carteret al 1984, Byrne et al 1987, none of these reports provide a satisfactory means for accounting for temporal variation in pine water potential. Schulze et al ( 1980a, b) and Linder et al ( 198 7) calculated a parameter termed "deficit-time."…”

Section: Discussionmentioning

confidence: 95%

“…Although these studies suggested that herbaceous plants (Nelson et al 1981) or hardwood and herbaceous plants strongly compete with pine for soil moisture (Carter et al 1984, Byrne et al 1987, none of these reports provide a satisfactory means for accounting for temporal variation in pine water potential. Schulze et al (1980a, b) and Linder et al (1987) calculated a parameter termed "deficit-time."…”

Section: Discussionmentioning

confidence: 99%

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Spatial and Temporal Variation in Competitive Effects on Soil Moisture and Pine Response

Mitchell¹,

Zutter²,

Green³

et al. 1993

Ecological Applications

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The effects of different plant life-forms, including a bunch grass species, Andropogon virginicus L. (broomsedge), and a sprouting deciduous tree species, Liquidambar styraciflua L. (sweetgum), on soil moisture and competitive responses of a transplanted coniferous tree seedling, Pinus taeda L. (loblolly pine), were investigated. Addition of the bunch grass and/or hardwood sprouts either had no effect or increased soil moisture in the surface soil (0-14 cm) depending on the time, while addition of sweetgum and/or broomsedge (greatest density alone) decreased soil moisture in deeper portions of the solum during the summer months. Soil moisture available to pine seedlings at various points in time was assessed by measuring predawn xylem pressure potential. Temporal variation in predawn xylem pressure potential was accounted for through a water stress integral approach. More than half of the variation in pine size after one growing season could be accounted for by the water stress integral.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial and Temporal Variation in Competitive Effects on Soil Moisture and Pine Response

Mitchell¹,

Zutter²,

Green³

et al. 1993

Ecological Applications

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“…Although there is an abundance of information relating loblolly pine response to the amount of competing herbaceous and (or) woody plants, the underlying causes or mechanisms for such responses are less well understood. A number of studies have shown soil water to increase and water stress of loblolly pine seedlings to be lessened,in the absence of woody and (or) herbaceous vegetation (Nelson et al 1981;Miller et al 1987;Byrne et al 1987. Perry et al 1994.…”

Section: Introductionmentioning

confidence: 99%

Fascicle nutrient and biomass responses of young loblolly pine to control of woody and herbaceous competitors

Zutter¹,

Miller²,

Allen³

et al. 1999

Can. J. For. Res.

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Individual fascicle mass and foliar nutrient content and concentration of young loblolly pine (Pinus taeda L.) were evaluated on 13 locations of a regionwide competition study in the southeastern United States. The study included a factorial combination of two levels of herbaceous weed control treatment (none, treated) and two levels of woody treatment (none, treated) following site preparation. At pine age 2 years, herbaceous treatment (HT) and woody treatment (WT) had a positive effect on individual fascicle biomass and content of N, P, and K at nearly all and at least half of the locations, respectively. In general, these effects mirrored responses noted for seedling diameter and height. N concentration increased and P concentration decreased at about half of the locations, while Ca and Mg concentrations decreased on nearly all locations with HT. By age 6 years, effects of HT and WT on fascicle mass and nutrient concentrations and contents became neutral or more neutral across the locations. This is attributed in part to the greater nutrient demand of larger crop pines and associated competition components. A notable exception from neutral effects at age 6, typically occurring on sites with high levels of woody vegetation, was the positive response in K concentration or content and negative response in Ca and Mg concentrations with WT.

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“…There have been limited attempts to integrate water deficit over time and relate it to tree growth, for example "moisture strain index" (Byrne et al, 1987).…”

Section: Integration Of Stress Factorsmentioning

confidence: 99%

Management of forests under nutrient and water stress

Nambiar

1990

Water Air Soil Pollut

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Abs~act.Managerae~t of forest nutrition through fertilization and other forestry practices has, undoubtedly, helped to increase the productivity of forests.Relatively little attention has been given to the potential for manipulating available water, although water relations of trees have been studied extensively. It is being increasingly recognized that, for fast-growing tree species, availability of water and its interaction with nutrients have overridin~ influences on growth, with major implicatiol~s for the development of cost effective management practices to increase yield~ For example, it has been argued that leaf area development is primarily controlled by available water and that in turn, determines the response to nutrient management. Crucial questions which need to be examined inlude: At the process level, how does the interplay between water and nutrients influence nutrient dynamics in forests? How do trees and associated vegetation interact with respect to the use of water and nutrients? How does water and nutrient availability influence leaf area development, assimilation and in particular assimilate partitioning? Does improved nutrition influence water use efficiency? An urgent need for the study of nutrition of trees under water stress also arises from the many problems encountered in reforesting arid and degraded lsnd. This paper is an overview of these issues, emphasizing the mechanisms and processes that underly the response of trees and steads to manil~/lations of water and nutrient availability.

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A moisture strain index for loblolly pine

Cited by 13 publications

References 0 publications

Spatial and Temporal Variation in Competitive Effects on Soil Moisture and Pine Response

Spatial and Temporal Variation in Competitive Effects on Soil Moisture and Pine Response

Fascicle nutrient and biomass responses of young loblolly pine to control of woody and herbaceous competitors

Management of forests under nutrient and water stress

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