Aalto, T.: Gas Exchange of Scots Pine Shoots: Stomatal Modelling and Field Measurements

1999 ◽  
Vol 42 (2) ◽  
Author(s):  
J. Pospisilova
Keyword(s):  
Gas Exchange ◽  
Scots Pine ◽  
Field Measurements

Field evidence for the optimality hypothesis of gas exchange in plants

1999 ◽  
Vol 26 (3) ◽  
pp. 239 ◽  
Author(s):  
Pertti Hari ◽  
Annikki Mäkelä ◽  
Frank Berninger ◽  
Toivo Pohja
Keyword(s):  
Stomatal Conductance ◽  
Gas Exchange ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Field Measurement ◽  
Field Data ◽  
Field Measurements ◽  
Leaf Structure ◽  
Model Parameters ◽  
Field Evidence

The ‘optimality hypothesis’ of gas exchange in plants has been studied since the 1970s, but testing it in the field has proven difficult. A recent reformulation of the hypothesis with detailing assumptions on leaf structure makes it possible to solve the optimisation problem explicitly, such that the predictions of gas exchange are readily testable against field data. This form of the model was tested against field measurements of photosynthesis, transpiration and stomatal conductance in Scots pine (Pinus sylvestris) shoots during three clear summer days. Model parameters were estimated independently from photosynthesis measurements on preceding days. The measurements were carried out at a new field measurement station with a very low level of noise. The predictions of photosynthesis, transpiration andstomatal conductance explained 84–98% of the variance in the data.

Uptake of SO2 in shoots of Scots pine: field measurements of net flux of sulphur in relation to stomatal conductance

1982 ◽  
Vol 5 (1) ◽  
pp. 75-83
Author(s):  
J-E. HALLGREN ◽  
S. LINDER ◽  
A. RICHTER ◽  
E. TROENG ◽  
L. GRANAT
Keyword(s):  
Stomatal Conductance ◽  
Scots Pine ◽  
Field Measurements ◽  
Net Flux

Dynamics of leaf gas exchange, chlorophyll fluorescence and stem diameter changes during freezing and thawing of Scots pine seedlings

2015 ◽  
Vol 35 (12) ◽  
pp. 1314-1324 ◽  
Author(s):  
Lauri Lindfors ◽  
Teemu Hölttä ◽  
Anna Lintunen ◽  
Albert Porcar-Castell ◽  
Eero Nikinmaa ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Scots Pine ◽  
Leaf Gas Exchange ◽  
Stem Diameter ◽  
Freezing And Thawing ◽  
Pine Seedlings

Plasticity in gas-exchange physiology of mature Scots pine and European larch drive short- and long-term adjustments to changes in water availability

2017 ◽  
Vol 40 (9) ◽  
pp. 1972-1983 ◽  
Author(s):  
Linda M. Feichtinger ◽  
Rolf T.W. Siegwolf ◽  
Arthur Gessler ◽  
Nina Buchmann ◽  
Mathieu Lévesque ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Scots Pine ◽  
Water Availability ◽  
European Larch ◽  
Short And Long Term

Uptake of SO2 in shoots of Scots pine: field measurements of net flux of sulphur in relation to stomatal conductance.

1982 ◽  
Vol 5 (1) ◽  
pp. 75-83
Author(s):  
J-E. Hallgren ◽  
S. Lindert ◽  
A. Richter ◽  
E. Troeng ◽  
L. Granat
Keyword(s):  
Stomatal Conductance ◽  
Scots Pine ◽  
Field Measurements ◽  
Net Flux

scholarly journals Effect of ammonium and nitrate source of nitrogen on productivity of photosynthesis in Scots pine (Pinus silvestris L.) seedlings

2015 ◽  
Vol 42 (4) ◽  
pp. 599-605 ◽  
Author(s):  
A. Łotocki ◽  
W. Żelawski
Keyword(s):  
Gas Exchange ◽  
Scots Pine ◽  
Growth Rates ◽  
Dry Matter ◽  
Nitrogen Nutrition ◽  
Growing Season ◽  
Sand Culture ◽  
Pinus Silvestris ◽  
Water Culture ◽  
Matter Production

Water culture and sand culture seedlings of Scots pine were investigated in respect to their reaction to ammonium or nitrate source of nitrogen nutrition. Photosynthesis, respiration, and dry matter production were studied in three and four months old plants. The results are preliminary but they have indicated that the effect of various form of nitrogen nutrition on gas exchange and growth rates could change during the growing season.

scholarly journals Gas exchange and organic matter production of Scots pine (Pinus sihestris L.) seedlings grown in water culture with ammonium or nitrate form of nitrogen

2015 ◽  
Vol 42 (4) ◽  
pp. 607-615 ◽  
Author(s):  
J. Zajączkowska
Keyword(s):  
Organic Matter ◽  
Gas Exchange ◽  
Scots Pine ◽  
Organic Substance ◽  
Pinus Silvestris ◽  
Water Culture ◽  
Organic Matter Production ◽  
Matter Production ◽  
Photosynthesis And Respiration

he reaction of Scots pine (<i>Pinus silvestris</i> L.) seedlings to ammonium and nitrate form of nitrogen was investigated. Rates of photosynthesis and respiration, content of chlorophylls, and accumulation of organic substance were determined in 12 and 18 weeks old plants. The results have shown, that the forms of nitrogen does affect the amount of accumulated organic substance as well as its distribution in particular organs.

scholarly journals Effect of climate factors on survival and growth of planted trees in scots pine (pinus sylvestris l.) plantations

2019 ◽  
Vol 26 (01) ◽  
pp. 85-93
Author(s):  
Batsaikhan G ◽  
Battulga P ◽  
Baterdene J ◽  
Gerelbaatar S ◽  
Tsogtbaatar J
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Tree Growth ◽  
Seedling Survival ◽  
Field Measurements ◽  
Annual Rainfall ◽  
Strong Positive Correlation ◽  
Climate Factors ◽  
Planted Forests ◽  
Significant Difference

This study was conducted in planted forests located in the Tujyin Nars National Park territory of Selenge province, Mongolia. We aimed at studying the effect of climate factors on seedling survival and tree growth at the Scots pine plantations. A total of five 50 x 20 m (0.1 ha) sized square sample plots were established at the plantations, planted between 2003 and 2007. All field measurements and data collection were carried out annually in September and October between 2003 and 2017. Annual field measurements of seedlings included: tree health status, diameter at stem basis, total height and annual height increments. We used climate data taken from the closest meteorological station (8-15 km to the north-west), “Sukhbaatar” located in Sukhbaatar Soum of Selenge province. To calculate the statistical analysis of the survival rate and seedling growth, we used the one-way analysis of variance (ANOVA) method to determine statistically significant differences in means among variables between the sites. An F-test and Pearson's correlation coefficient were used to assess the relationships between climate variables and survival and tree growth. Our findings showed a significant difference (F=28.4, p<0.001) between seedling survival among plantations planted in different years of plantation establishment. The study revealed that there is a strong negative correlation (r=-0.76) between seedling survival and number of critical dry days, and contrary, strong positive correlation (r =0.71) with the precipitation for May. The increment of planted trees was more sensitive to air temperature (r = 0.47), annual rainfall (r = 0.72), air relative humidity and number of dry days during the first three years than in subsequent years. Таримал өсвөр нарсан (pinus sylvestris l.) ойн амьдралт, өсөлтөнд уур амьсгалын үзүүлэх нөлөө Хураангуй  Тус судалгааг Сэлэнгэ аймгийн Алтанбулаг, Шаамар сумын нутагт ойжуулалтаар тарьж  ургуулсан таримал нарсан ойд гүйцэтгэв. Судалгааны ажлын зорилго нь таримал ойн моддын  амьдралт, өсөлтөнд уур амьсгалын үзүүлэх нөлөөг судлахад оршино. Судалгаанд 2003-2007  онуудад ойжуулсан таримал ойн мониторинг судалгааг 2003 -2017 онуудад жил бүр  тасралтгүй гүйцэтгэлээ. Ойжуулсан талбай бүрд 50 х 20 м (1000 м2) хэмжээтэй дээж  талбайг байгуулан, түүнд таримал модны эрүүл байдал, ишний өндөр, диаметрийн өсөлт  болон титмийн өндрийг хэмжив. Ишний шинжилгээний дээжид модны өндрийн болон  диаметрийн өсөлтийн хэмжилтийг хийсэн ба уур амьсгалын үзүүлэлтэд судалгааны талбайд  хамгийн ойр (10 км) орших Сэлэнгэ аймгийн цаг уурын ажиглалтын “Сүхбаатар” станцын  2003-2017 оны хугацаанд дахь цаг уурын мэдээг ашиглав. Хэмжилтийн статистик  үзүүлэлтүүдийг боловсруулахад нэг хүчин зүйлт вариансийн шинжилгээ (ANOVA), модны  өндөр, диаметрийн өсөлтийн явц болон уур амьсгалын үзүүлэлтүүд хоорондын хамаарлыг  Персоны корреляцын коэффициеитээр илэрхийлэв. Судалгааны үр дүнгээс үзвэл, ялгаатай цаг  хугацаанд ойжуулсан талбайн моддын амьдралт статистикийн хувьд ялгаатай (F=28.4,  p<0.001), ялангуяа 5-р сарын хэт хуурайшилттай өдрийн үргэлжлэх хугацаа (r=-0.76),  ургамал ургалтын хугацааны агаарын температур, хур тунадасны нийлбэр (5-р сар r =0.71,  6- сар r=0.41, 7- сар r= 0.46) - тэй хүчтэй, эерэг хамааралтай байна. Ойжуулалтанд  шилжүүлсний дараах тарьцын хоёр болон гурав дахь жилийн нийлбэр өндрийн өсөлт, жилийн  дундаж агаарын температур (r = 0.47), диаметрийн өсөлт нь жилийн нийлбэр хур  тунадастай (r = 0.72) эерэг, хүчтэй хамааралтай байна.  Түлхүүр үг: Ойжуулалт,өндөр, диаметр, цаг уур, хамаарал 

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