Wyniki wyszukiwania - AGRO

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Monitoring of xylem formation in Picea abies under drought stress influence

100%

Gryc V., Hacura J., Vavrcik H., Urban J., Gebauer R.

Dendrobiology

|

2012

|

tom 67

The effect of drought stress on regular cambium activity and wood formation in stems of two different clones of Norway spruce (Picea abies (L.) Karst.) was investigated. Tissue samples were taken during the growing season from May to September 2010. Artificial drought stress, induced by long-term sheltering of the soil, was significantly manifested in clone 15. In the stressed individual, the period of cambium activity was shorter, the total number of formed cells was lower and the resulting tree ring was narrower. The number of cells in the phases of postcambial growth and secondary cell wall formation was significantly lower in comparison to the control tree. The tracheid lignification process was slower in the tree stressed by water deficit and the first mature tracheids were observed later. On the other hand, in clone 18 probably genetic dispositions played an important role as no considerable deviations in the cambium activity and new wood cells production were observed. Fitting xylem increments to the Gompertz function showed that the period of the most intensive cell formation was at the turn of June and July and the maximum daily production of new cells was higher in non-stressed individuals than in the stressed ones. The results of the experiment lead us to the conclusion that drought stress can significantly affect the cambium activity of some clones, the differentiation process of anatomical elements, and thus also the resulting tree ring width.

2

Preliminary results on allozyme diversity and differentiation of norvay spruce [Picea abies [L.] Karst.] in Poland based on plus tree investigations

100%

Lewandowski A., Burczyk J., Chalupka W.

Acta Societatis Botanicorum Poloniae

|

1997

|

tom 66

|

nr 2

197-200

3

A double shaped individual of Norway spruce [Picea abies [L.]Karst.]

100%

Krupski P.

Rocznik Dendrologiczny

|

1997

|

tom 45

173-174

4

Variation of tree-ring width in Picea abies L. Karsten in Bialowieza Forest

100%

Wisniewska K.

Folia Forestalia Polonica. Series A . Forestry

|

1990

|

tom 32

5

Dwudziestoletnie doswiadczenie proweniencyjne ze swierkiem [Picea abies [L.]Karsten] serii IUFRO 1972 w Lesnym Zakladzie Doswiadczalnym Siemianice. V. Proba syntezy

100%

Barzdajn W.

Sylwan

|

1996

|

tom 140

|

nr 08

11-17

6

The radial growth-competition relationship in Picea abies stands affected by windfall

100%

Badea O., Dumitru I., Cojocia C., Popa I.

Dendrobiology

|

2015

|

tom 73

Actual status of mountain forests especialy, of Norway spruce (Picea abies Karst. (L)) stands is a result of combined action between forest management measures and biotic and abiotic risk factors. In this context, tree growth dynamics is a result of multifactor interaction (competition, disturbance, management practice, climate etc.). Wind damage affect the stand structure and normal ecosystem functions including the relationship between individual tree growth and competition processes. Though, it is recorded a diminishing of productive capacity for affected stands as well as a significant diameter increment for remaining standing trees. The correlation between tree growth (cumulate basal area increment in the last 10 years) and competition (Hegyi and Schutz competition indices) was analysed in stands with different windfall intensity. No relationship between tree growth and competition was observed in highly affected stands. Schutz competition index explains better individual tree growth comparing with Hegyi index in low or no-affected stand by windthrow. The variability of the basal area increment (lnΔɡ10), explained by competition indices, is rather low (<2%) in the stand that had been highly affected by windfall, regardless of the selected competition index. Thus, significant reduction of the stand density related to number of trees (low density), as a consequence of high intensity windfalls, crown competition has a very small influence on the basal area increment comparing with situations met in low (high density) and moderate (medium density) affected stands.

7

Cytomixis in the shoot apical meristem of the Norwy spruce

100%

Guzicka M., Wozny A.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

8

Swierk pospolity [Picea abies [L.]Karst.] w 30-letnim doswiadczeniu proweniencyjnym serii IUFRO 1972 w Nadlesnictwie Doswiadczalnym Siemianice

86%

Barzdajn W.

Sylwan

|

2003

|

tom 147

|

nr 07

24-30

9

Uwagi o znaczeniu kambio- i ksylofagów świerka pospolitego Picea abies (L.) Karst. dla lasów Białowieskiego Parku Narodowego i otaczających go drzewostanów gospodarczych

86%

Gutowski J. M.

Parki Narodowe i Rezerwaty Przyrody

|

1985

|

tom 06

|

nr 2

10

Analiza produktywnosci swierka pospolitwgo [Picea abies [L.] Karst.] roznych proweniencji i rodow z nizu poludniowej Polski

86%

Krupski P., Giertych M.

Arboretum Kórnickie

|

1997

|

tom 42

185-198

11

Flowering and cone bearing of Picea abies grafts in second-generation seed orchards

86%

Misiorny A., Chalupka W.

Dendrobiology

|

2006

|

tom 56

51-59

In 2004, abundant flowering of Norway spruce (Picea abies (L.) Karst.) was observed in two second- generation seed orchards: (1) ‘Outbreeding’, promoting crossing between clones of five geographically distant populations; and (2) ‘Kolonowskie’, restoring a population whose offspring exists only in an international experiment (IUFRO 1964/1968). In bothseed orchards, female strobili were produced by 91.3% and 91.7% of clones, represented by 64.1% and 55.5% of grafts, respectively, and statistically significant differences between clones were found in the number of mature cones. In the case of the seed orchard ‘Outbreeding’, the number of mature cones in individual clones was significantly correlated with latitude of the origin of maternal populations (r = 0.8826, p = 0.0470). The majority (95%) of cones in seed orchards ‘Outbreeding’ and ‘Kolonowskie’ were produced by only 28.2% and 38.5% of all clones, and 21.4% and 25.7% of all grafts, respectively. These data attest to a disparity between the level of genetic diversity in seed orchard progeny resulting from the observed numbers of cone-bearing clones and grafts and the genetic diversity expected from the actual participation of clones and grafts in seed orchard composition. The estimated seed production per 1 ha of seed orchard area in 2004 reached 21.05 kg for ‘Outbreeding’ and 21.72 kg for ‘Kolonowskie’.

12

Genetyczna wartość świerka istebniańskiego

86%

Giertych M.

Sylwan

|

1996

|

tom 140

|

nr 03

29-38

13

Lata wskaźnikowe świerka pospolitego z Puszczy Augustowskiej

86%

Orzechowski M., Tomusiak R., Ksepko M.

Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej

|

2016

|

tom 18

|

nr 3[48]

14

Charakterystyczna deformacja swierka Picea abies [L.]Karst. na wylesionych obszarach w Sudetach Zachodnich

86%

Samojlo S.

Wszechświat

|

1999

|

tom 100

|

nr 09

198-199

15

Ocena jakości hodowlanej zasobów genowych najlepszych pochodzeń świerka w Polsce

86%

Janson L.

Sylwan

|

1996

|

tom 140

|

nr 03

47-54

16

Wzrost polskich populacji swierka pospolitego [Picea abies Karst.] w doswiadczeniu IUFRO 1972

86%

Matras J.

Prace Instytutu Badawczego Leśnictwa. Seria A

|

2002

|

nr 4[944-947]

73-97

17

Dwudziestoletnie doświadczenie proweniencyjne ze świerkiem [Picea abies [L.]Karst.] serii IUFRO 1972 w Leśnym Zakładzie Doświadczalnym Siemianice. IV. Odporność drzew

86%

Barzdajn W.

Sylwan

|

1996

|

tom 140

|

nr 06

15-21

18

Produkcja biomasy w drzewostanach świerkowych w strefie zagrożenia w Sudetach

86%

Czarnowski M. S.

Sylwan

|

1993

|

tom 137

|

nr 08

75-78

19

A contribution the the knowledge of the distribution of Picea abies [L.] H.Karst.f.deflexa Tyszk.

86%

Danielewicz W., Malinski T.

Rocznik Dendrologiczny

|

1997

|

tom 45

45-55

20

Incidence of butt rot in Norway spruce seed stands in Poland's mountain regions assessed with sonic tomography

86%

Chomicz E.

Folia Forestalia Polonica. Series A . Forestry

|

2013

|

tom 55

|

nr 4

The incidence and severity of butt rot were assessed in 12 selected Norway spruce seed stands in the Beskidy Mountains, Poland. A semi-invasive technique of sonic tomography was used for the assessment of rot damage. Stands of different age classes (100–120, 130–150, 160–170 years old) and distinct regions of provenance (Istebna and Orawa) were investigated. Hierarchical analysis of variance was used to determine effects of stand age and stand provenance on butt rot occurrence at a stand level. High incidence of butt rot was noted in all of the studied seed stands (47% to 87% of diagnosed tree samples). Stand age had a significant effect on percentage share of ‘damaged wood’ on the tomogram. The extent of rot damage was rising with stand age, and the largest was observed in the age category 160–170 years. Spruce stands of Istebna provenance were generally more damaged by butt rot than those of Orawa provenance, however, the latter have been growing in forest sites more suitable for spruce in terms of fertility and altitude. Hierarchical analysis of variance did not show a statistically significant relationship between the region of provenance and average share of ‘damaged wood’ on the tomogram. Presented results indicate that for stands growing in similar conditions vulnerability to butt rot is determined by stand age. Further research is needed to separate impact of stand provenance identified with specific genetic constitution of a population from the effect of environmental conditions typical of a given region of provenance.

Ograniczanie wyników