Effects of light preconditioning on the seasonal water relations of nursery-grown Douglas-fir
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Effects of light preconditioning on the seasonal water relations of nursery-grown Douglas-fir

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Published .
Written in English


  • Douglas fir.

Book details:

Edition Notes

Statementby Allan Pierce Drew.
The Physical Object
Pagination[14], 121 leaves, bound :
Number of Pages121
ID Numbers
Open LibraryOL14239443M

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This was replicated over two years, and , with the subsequent effects of prior light treatment upon growth and phenology noted as well as current effects of first-year growth upon seedling water relations. Water relations analysis was based on the model, Plant Moisture Stress = f (Soil Moisture Stress, Leaf Conductance) and data subdivided as to summer, fall, and winter according to differing . Title: EFFECTS OF LIGHT PRECONDITIONING ON THE SEASONAL WATER RELATIONS OF NURSERY-GROWN DOUGLAS-FIR Abstract approved: W, K. Ferrell Douglas-fir seedlings of a single seed source were grown in a nursery under three levels of light intensity: 9, 44, and percent of full light. Growth over an entire growing season was monitored in. Stands were dominated by Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), grand fir (Abies grandis (Douglas ex D. Don) Lindley), and western red cedar (Thuja plicata Donn ex D. Don). As expected, higher density stands intercepted greater amounts of light. Thinned stands intercepted 33–58% less light than controls, depending on tree by: Effects of preconditioning on subsequent water relations, stomatal sensitivity, and photosynthesis in osmotically stressed black spruce.

1. Plants use light as a source of both energy and information. Plant physiological responses to light, and interactions between plants and animals (such as herbivory and pollination), have evolved under a more or less stable regime of h cycles of light and darkness, and, outside of the tropics, seasonal variation in day length. by: What is the effect of light and water on plant growth (I am using grass seed)? The rate at which grass grows can depend on many, many things. Mineral nutrients, daylength, aeration of the soil, pests, diseases, variety, time of planting, physical features of the soil, presence of other plants within a metre or so, carbon dioxide in the air, as well as water and light. To determine the effects of lifting time and storage on water-stress resistance of nursery-grown white spruce (Picea glauca (Moench) Voss) seedlings, we compared gas exchange, water relations and.   Light is the most important variable influencing plant growth. If plants do not receive enough light, they will not grow at their maximum rate or reach their maximum potential, regardless of how much of any other variable – water, growth medium or fertiliser – they receive.

1. Introduction. Fire suppression and lack of adequate density management in the Pacific Northwest cause many forest stands to be overstocked. Overstocked stands experience greater competition for growth-limiting resources, including light, water, and nutrients, causing tree stress within the stand (Cole and Newton, , Nambiar and Sands, ).In addition to greater competition, changing Cited by: (). Seasonal effects of light exposure, temperature, trunk growth and plant carbohydrate status on the initiation and growth of epicormic shoots in Prunus persica. The Journal of Horticultural Science and Biotechnology: Vol. 81, No. 3, pp. Cited by: The effect of seasonal variations in physical parameters on quality of gravity flow water in the study sites (Kigata, Kihanga, Kacuro, Kitibya and Kanjobe) located in Kyanamira Sub-County; Kabale District, Uganda was studied. The study involved de-termining the variations in physical parameters of the water during the dry (March-File Size: 1MB. The quality of water change with the changes in seasons. These seasonal changes may have both positive and negative impact on the quality of water. Different seasons have various temperature variations attributed to them. The temperature changes that occur as a result of climate change cause turning in water reservoirs. The quality of water is affected in terms of its mass.