Dynamics, structure and properties of plant litterfall in a 120-year old beech stand in Middle Pomerania between 2007-2010

2013 ◽  
Vol 64 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Jerzy Jonczak
Keyword(s):  
Chemical Composition ◽  
Fagus Sylvatica ◽  
Structure And Properties ◽  
Weighted Mean ◽  
Beech Stand ◽  
Fagus Sylvatica L ◽  
Phosphorus And Potassium ◽  
Seed Coats ◽  
Maximum Content ◽  
Nitrogen Phosphorus

Abstract Studies of plant litterfall mass, its dynamics, structure and chemical composition were conducted between 2007.2010 in a 120-year old beech (Fagus sylvatica L.) stand located in Middle Pomerania. The annual mass of litterfall during the study period ranged from 2.793 to 5.398 t·ha.1 and its maximum was observed during the seed year. Leaves were the major component of plant litterfall and their contribution was 82.4.84.5% in the non-seed years and 47.2% during the seed year. Inflorescences, seeds, and seed coats were important components of litterfall during the seed year and accounted together up to 39.8% of the total litterfall mass. Particular fractions of litterfall significantly differed in the chemical composition. The highest concentrations of nitrogen, phosphorus and potassium were noticed in seeds and leaves collected in spring and the maximum content of calcium was observed in leaves collected in autumn. The weighted mean annual concentrations of nitrogen ranged within 0.81.1.13%, phosphate . 0.126.0.153%, potassium . 0.298.0.485% and calcium . 0.416.0.583%. The influx of elements with litterfall to the soil was: 167.3.225.9 kg·ha-1 of ash, 23.2.61.0 kg·ha-1 of nitrogen, 3.6.7.6 kg·ha-1 of phosphorus, 8.3.26.2 kg·ha-1 of potassium and 15.3.22.4 kg·ha-1 of calcium.

scholarly journals Fertilization With Nitrogen, Phosphorus and Potassium on Soil Fertility and Nutritional Status of Yellow Passion Fruit Plants

2019 ◽  
Vol 11 (5) ◽  
pp. 142
Author(s):  
Rodrigo T. M. Miyake ◽  
William H. S. Takata ◽  
Nobuyoshi Narita ◽  
José E. Creste
Keyword(s):  
Nutritional Status ◽  
Soil Fertility ◽  
Nitrogen Fertilization ◽  
Passion Fruit ◽  
Triple Superphosphate ◽  
Fruit Plants ◽  
Phosphorus And Potassium ◽  
Maximum Content ◽  
Nitrogen Phosphorus ◽  
Yellow Passion Fruit

The research had as objective to study the influence of the doses of nitrogen, phosphorus and potassium on soil fertility and nutritional status of yellow passion fruit plants. The experimental design was in randomized blocks in an incomplete fractioned factorial 1/2 (4 × 4 × 4), with four doses of N (150, 300, 600 and 1200 Kg-1 ha-1 yr-1 N); four doses of P2O5 (200, 400, 800 and 1600 kg-1 ha-1 yr-1) and four doses of K2O (100, 300, 500 and 700 kg-1 ha-1 yr-1). The fertilizers used were the ammonium nitrate = 32% N; triple superphosphate = 44% P2O5 and potassium chloride = 60% K2O. In the fertility of the nitrogen fertilization increased the content of phosphorus and sulfur. The doses of P2O5 increased the concentration of P in the soil. The doses of K2O influenced the increase in the content of K in the soil in the harvest 2013/2014. There was an interaction of the doses of N and K2O in the availability of K in the soil in the harvest 2012/13 with the maximum levels of K, in the doses of 200-400 kg N ha-1 and 600 to 700 kg ha-1 of K2O. In the nutritional state the yellow passion fruit plants was influenced by the doses of N for the sulfur content of the leaves. The maximum content of S leaf concentration of 3.63 g kg-1 was obtained in the dose estimated at 1120 kg ha-1 of P2O5.

scholarly journals Development of target (crop) trees in beech (Fagus sylvatica L.) stand with delayed initial tending and managed by different thinning methods

2013 ◽  
Vol 59 (No. 6) ◽  
pp. 253-259 ◽  
Author(s):  
I. Štefančík
Keyword(s):  
Fagus Sylvatica ◽  
Control Plot ◽  
Stand Age ◽  
Forest Research ◽  
Research Institutes ◽  
Beech Stand ◽  
Fagus Sylvatica L ◽  
Crown Thinning ◽  
Research Period

We evaluated the research on silviculture-production in the last 45 years in a 105-year-old beech stand, not tended up to its stand age of 60 years. Four alternatives (tending regime) were studied for development of the target (crop) trees. These were: (i) plot with heavy thinning from below (C degree according to the German Forest Research Institutes from 1902), (ii) plot with free crown thinning (thinning interval of 5 years), (iii) plot with free crown thinning (thinning interval of 10 years), and (iv) control plot (with no thinning). Target trees in the stand were selected and marked at the beginning of the study. Their development was analysed in relation to the method of tending. Based on the 45-year research period, we conclude that the most favourable results were obtained on plots tended by free crown thinning (thinning interval of 5 or 10 years) in comparison with plots tended by heavy thinning from below or with the control plot (without any tending).    

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