Results 201 to 210 of about 49,100 (228)

Prediction of bud burst in Douglas-fir by degree-day accumulation

Canadian Journal of Forest Research, 1982
A temperature threshold, starting date, and heat unit total are required for use of degree-days. The three parameters are not independent, the heat unit total depending largely on the threshold used. An iterative solution is presented to estimate these parameters for Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) bud burst from observations of ...
A. J. Thomson, S. M. Moncrieff
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Photoperiod sensitivity of bud burst in 14 temperate forest tree species

Agricultural and Forest Meteorology, 2012
Abstract The timing of spring phenology of trees reflects a trade-off between a longer growing season and a lower risk for damage by late freezing events. Temperature is driving rates of development directly, but given the high inter-annual variability in weather, it is a poor environmental cue for the progression of the season and thus, the period ...
Basler, David, Körner, Christian
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Studies on the sultana vine. II. The course of bud burst.

Australian Journal of Agricultural Research, 1955
Sultana vines were examined during bud burst for four seasons, and the date on which each shoot arose was noted. The shoots were later classified as fruitful, barren, or defective. The vines were pruned uniformly in the first season, and two pruning treatments were compared in the other three seasons. In all cases the mean time of bursting a t each bud
AJ Antcliff, WJ Webster
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Dormancy and time of bud burst in the sultana vine

Australian Journal of Agricultural Research, 1966
Time of bud burst for sultana vines at Merbein has been closely related to sums of daily temperatures at four periods during bud dormancy by a multiple regression covering 17 years, the result being supported by field trials of vine heating. Bud burst is delayed by higher daily maximum temperatures in May.
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Suppressed water availability in winter buds delays the bud burst of broad-leaved trees in a heavy snow forest

Tree Physiology
Abstract Early snowmelt is known to accelerate budburst. Budburst and leaf expansion require water absorption, and current-year vessels, which function as water pathways, begin to mature in early spring. However, whether the limitation of xylem reactivation by snow affects budburst and leaf expansion remains unclear.
Shin Shoji, Kenichi Yoshimura
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Temperature Effects on Bud-Burst and Leaf-Fall in Subalpine Larch

Journal of Sustainable Forestry, 1993
Phenology was monitored in natural stands of subalpine larch (Larix lyallii Parl.) in parts of four decades. Bud-burst date varied by about six weeks from year to year, and leaf-fall date by a month, suggesting that the importance of photoperiod in these processes has been over emphasized, even in the case of leaf-fall.
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Evaluation of temperature models for predicting bud burst in Norway spruce

Canadian Journal of Forest Research, 1999
Spring bud development was assessed on cuttings of 17 Norway spruce (Picea abies (L.) Karst.) clones for up to 7 years at two sites in southern and central Sweden. The ability of various temperature models to predict bud-burst timing was analysed. All temperature-based models resulted in significantly better predictions than the null model, day number.
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Respiration and oxygen status during bud burst of grapevine

2013
Bud dormancy is an important strategy in the phenology of temperate perennial trees, including important crops such as grapevine. Temperature and photoperiod play key roles in regulating dormancy, particularly accumulation of chilling hours. However, dormancy is a quantitative state and in many cases facultative.
Meitha, Karlia, Konnerup, Dennis, Considine, John A., Foyer, Christine H, Colmer, Timothy David, Considine, Michael J.   +5 more
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May 10, 2020 Bud burst!

2023
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Improvement of chilling and forcing model to predict bud-burst

2006
Timing of bud-burst for crop and forest species mainly depends on air temperature variation during the winter season. Exposure to a particular duration of cold temperature is needed to meet the chill requirement and break dormancy. The effectiveness of time-temperature combinations on meeting chilling requirements varies between species.
CESARACCIO C, SPANO D, SNYDER RL, DUCE P, JONES H   +4 more
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