Impact of clone mixture composition on stability of 7th-year mean height in a series of Norway spruce clone tests

1990 ◽  
Vol 20 (6) ◽  
pp. 757-763 ◽  
Author(s):  
B. G. Bentzer ◽  
G. S. Foster ◽  
A. R. Hellberg
Keyword(s):  
Growth Performance ◽  
Norway Spruce ◽  
Reduction Process ◽  
Height Growth ◽  
Relative Height ◽  
Southern Sweden ◽  
Variation Pattern ◽  
Elimination Process ◽  
Stepwise Manner ◽  
Location Interaction

Four mixtures of Norway spruce (Piceaabies (L.) Karst.), each containing 56 clones, were analysed for height at age 7 years at six locations in southern Sweden. The number of clones in each mixture was subsequently reduced in a stepwise manner from 56 to 40, 30, 20, 10, and finally, 5 clones. The reduction process was conducted in three ways: (i) random deletion, (ii) deletion based on height growth, and (iii) deletion based on clone stability. No difference among the means of clone mixtures could be found for 20–56 clones for any elimination procedure tested, and no mixture × location interaction existed despite the number of clones in the mixture or the elimination process used. Location effects were consistently significant, independent of the number of clones in each mixture. Also, replication effects were significant in all cases but one. Random elimination of clones resulted in weak differences between mixture means when 10 and 5 clones were included. Deletion of clones based on lack of stability or inferior height growth only slightly changed the variation pattern compared with when all 56 clones were present in each mixture. Relative height growth performance of clone mixtures with as few as 5 clones appeared to be stable within the region of Sweden that was represented by the trials.

scholarly journals Modeling early height growth in trials of genetically improved Norway spruce and Scots pine in southern Sweden

Silva Fennica ◽  
2017 ◽  
Vol 51 (3) ◽  
Author(s):  
Samuel Egbäck ◽  
Urban Nilsson ◽  
Kenneth Nyström ◽  
Karl-Anders Högberg ◽  
Nils Fahlvik
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Height Growth ◽  
Southern Sweden ◽  
Genetically Improved

Vegetation management on grass-dominated clearcuts planted with Norway spruce in southern Sweden

1999 ◽  
Vol 29 (7) ◽  
pp. 1015-1026 ◽  
Author(s):  
Urban Nilsson ◽  
Göran Örlander
Keyword(s):  
Norway Spruce ◽  
Vegetation Management ◽  
Shoot Length ◽  
Southern Sweden ◽  
Vegetation Control ◽  
Containerized Seedlings ◽  
Soil Temperatures ◽  
Stock Type ◽  
Bare Root ◽  
Relative Differences

A field experiment was established between 1989 and 1993 to study the effects of competing vegetation on growth of planted Norway spruce (Picea abies (L.) Karst.) seedlings. Effects of clearcut age, scarification (mounding), herbicide treatment, and seedling stock type were investigated 5 years after planting. On fresh clearcuts, amounts of vegetation were negligible, whereas 2.1-3.7 Mg·ha-1 was found on 4-year-old and older clearcuts. Soil temperatures were about 10% higher in mounds than in undisturbed ground, while herbicide and clearcut age only marginally affected soil temperatures. Seedlings planted on old clearcuts showed significant reductions in growth due to interference from vegetation. Five years after planting, the reduction in growth corresponded to about 1 year's growth. Most of the interaction between seedlings and vegetation occurred during the first 2 years after planting. Thus, scarification was just as effective as repeated herbicide treatments in reducing competition from vegetation. Differences in periods of drought between years could largely explain variation in leading shoot length. However, leading shoot length was affected in the same way irrespective of vegetation control treatments. Five years after planting, the relative differences in diameter between bare-root and containerized seedlings were the same as at the time of planting.

Weather-sensitive height growth modelling of Norway spruce using repeated airborne laser scanning data

2021 ◽  
Vol 308-309 ◽  
pp. 108568
Author(s):  
Luiza Tymińska- Czabańska ◽  
Jarosław Socha ◽  
Paweł Hawryło ◽  
Radomir Bałazy ◽  
Mariusz Ciesielski ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Laser Scanning ◽  
Height Growth ◽  
Airborne Laser Scanning ◽  
Growth Modelling ◽  
Airborne Laser

scholarly journals Diquat Determines a Deregulation of lncRNA and mRNA Expression in the Liver of Postweaned Piglets

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Jin Wang ◽  
Zhi-xin Li ◽  
Dan-dan Yang ◽  
Pei-qi Liu ◽  
Zhi-qiang Wang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Growth Performance ◽  
Signaling Pathways ◽  
Molecular Mechanisms ◽  
Reduction Process ◽  
Future Research ◽  
Control Group ◽  
Oxidoreductase Activity ◽  
Go Terms ◽  
Porcine Hepatocytes

Oxidative stress is detrimental to animals and can depress the growth performance and regulate the gene expression of animals. However, it remains unclear how oxidative stress regulates the expression of long noncoding RNAs (lncRNAs) and mRNAs. Therefore, the purpose of this article was to explore the profiles of lncRNAs and mRNAs in the liver of piglets under oxidative stress. Here, we constructed a piglet oxidative stress model induced by diquat and evaluated the effects of oxidative stress on the growth performance and antioxidant enzyme activity of piglets. We also used RNA-Seq to examine the global expression of lncRNAs and mRNAs in piglets under oxidative stress. The targets of lncRNAs and mRNAs were enriched in gene ontology (GO) terms and signaling pathways. The results show that the growth performance and activities of antioxidant enzymes were decreased in piglets under oxidative stress. Moreover, eight lncRNAs (6 upregulated and 2 downregulated) and 30 mRNAs (8 upregulated and 22 downregulated) were differentially expressed in the oxidative stress group of piglets compared to the negative control group. According to biological processes in enriched GO terms, the oxoacid metabolic process, intramolecular oxidoreductase activity, and oxidation-reduction process play important roles in oxidative stress. Pathway analysis showed that the signaling pathways involved in insulin and glucose metabolism had a close relationship with oxidative stress. Furtherin vitroexperiments showed that the expression of the upregulated geneGNMTwas significantly increased in primary porcine hepatocytes after diquat stimulation. In contrast, the level of the downregulated geneGCKwas significantly decreased at 12 h in primary porcine hepatocytes after diquat stimulation. Our results expand our knowledge of the lncRNAs and mRNAs transcribed in the livers of piglets under oxidative stress and provide a basis for future research on the molecular mechanisms mediating oxidative stress and tissue damage.

Site Index Curves for Norway Spruce in Southern Ontario1

1989 ◽  
Vol 6 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Andrew M. Gordon ◽  
Peter A. Williams ◽  
Edward P. Taylor
Keyword(s):  
Norway Spruce ◽  
Soil Texture ◽  
Sandy Soils ◽  
Site Index ◽  
Height Growth ◽  
Stem Analysis ◽  
Mean Values ◽  
Breast Height ◽  
Drainage Class ◽  
The Mean

Abstract Four dominant or codominant Norway spruce trees from each of 55 sites were destructively sampled and the annual height growth determined by stem analysis. The sampled sites were stratified by soil textural class (coarse, medium, and fine) and depth to distinct mottling (0-16, 16-40, and 40 in.). Two sets of an-amorphic site index curves were constructed using a total age of 30 years (SI30), and breast height age of 25 years (SIBH25) as base ages. The mean SI30 from Ontario (53 ft) was found to be 17.8% higher than the mean values published from Vermont (45 ft) and currently used in Ontario. SIBH25 values had a range of 34.6 to 74.8 ft with a mean of 55.3 ft. Analysis of variance showed significant differences in SIBH25 due to soil texture and drainage class, and in years to breast height (BH) due to drainage class. SIBH25 was highest on sites with loamy soils and distinct mottling at 16-40 in. It took an average of 6.5 years for seedlings to reach BH with a range of 3 to 12 years. Years to BH was lowest on sites with sandy soils and those with distinct mottling below 40 in. North. J. Appl. For. 6(1):23-26, March 1989.

scholarly journals Comparison of Reconstituted, Acidified Reconstituted Milk or Acidified Fresh Milk on Growth Performance, Diarrhea Rate, and Hematological Parameters in Preweaning Dairy Calves

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 778 ◽  
Author(s):  
Lingyan Li ◽  
Jiachen Qu ◽  
Xiaoyue Xin ◽  
Shuxin Yin ◽  
Yongli Qu
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Hematological Parameters ◽  
Height Growth ◽  
Dairy Calves ◽  
Initial Body Weight ◽  
Positive Effects ◽  
Fresh Milk ◽  
Dietary Treatments ◽  
Reconstituted Milk

The present experiment was carried out to assess the effects of reconstituted milk (RM), acidified reconstituted milk (ARM), and acidified fresh milk (AFM) on growth performance, diarrhea rate, and hematological parameters of preweaning dairy calves. For this purpose, a total of 27 Holstein female calves (one month of age) with initial body weight of (67.46 ± 4.08) kg were divided into three groups in such a way that each group contained nine calves. Calves were housed individually, and starter was offered ad libitum to each calf. The dietary treatments were RM, ARM, and AFM. The highest milk intake was observed in calves receiving AFM as compared to other treatments (p < 0.01). Calves fed AFM had more feed intake than those fed ARM and RM (p < 0.01). Feed efficiency was significantly lower for calves offered ARM than those offered RM and AFM (p < 0.01). A lower withers height growth was found for calves fed RM than those fed ARM and AFM (p <0.05). Diarrhea rate and white blood cell (WBC) and lymphocytes (LYM) counts were greater for calves fed RM than those fed ARM and AFM (p < 0.05). These findings suggested that ARM and AFM had positive effects on growth performance and health status of the preweaning dairy calves.

scholarly journals Consequences for bird diversity from a decrease in a foundation species—replacing Scots pine stands with Norway spruce in southern Sweden

2019 ◽  
Vol 19 (5) ◽  
pp. 1429-1440 ◽  
Author(s):  
Matts Lindbladh ◽  
Lisa Petersson ◽  
Per-Ola Hedwall ◽  
Renats Trubins ◽  
Emma Holmström ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Foundation Species ◽  
Bird Diversity ◽  
Southern Sweden ◽  
Pine Stands ◽  
Scots Pine Stands
Sign in / Sign up

Export Citation Format

Share Document