Nitrogen and phosphorus cycling following prescribed burning in natural and managed Aleppo pine forests

1999 ◽  
Vol 29 (8) ◽  
pp. 1237-1247 ◽  
Author(s):  
D Gillon ◽  
C Houssard ◽  
J C Valette ◽  
E Rigolot
Keyword(s):  
Forest Floor ◽  
Prescribed Burning ◽  
Pinus Halepensis ◽  
Fire Severity ◽  
Nutrient Balance ◽  
Pine Needles ◽  
Aleppo Pine ◽  
Slight Reduction ◽  
Nitrogen And Phosphorus ◽  
Natural Stand

Two prescribed burnings (downhill and uphill fires) were conducted in two stands of Aleppo pine (Pinus halepensis Mill.): a natural stand and a managed stand that was subject to thinning, pruning, and shrub removal. The concentrations of nitrogen (N) and phosphorus (P) in the pine needles and regrowth of the main shrub species, Quercus coccifera L., and the quantities of N and P in the needle fall and in the forest floor were measured during the 6 months following the fires. The concentrations of N and P in the pine needles and leaves of Q. coccifera increased compared with the unburned control after both fires in the natural stand, where there was only a slight reduction in fuel during prescribed burnings and where there was an abundant fall of scorched needles. In contrast, the chemical composition of the foliage was unchanged after the fires in the managed stand, where there was a greater reduction in fuel, and where only small quantities of scorched needles fell. This study showed that first opening prescribed burnings (natural stand) were less severe in terms of nutrient balance than maintenance prescribed burnings (managed stand) and that the forest floor reduction was a good indicator of fire severity.

Impact of prescribed burning on the nutrient balance of heathlands with particular reference to nitrogen and phosphorus

2005 ◽  
Vol 8 (2) ◽  
pp. 183-192 ◽  
Author(s):  
T. Niemeyer ◽  
M. Niemeyer ◽  
A. Mohamed ◽  
S. Fottner ◽  
W. Härdtle
Keyword(s):  
Prescribed Burning ◽  
Nutrient Balance ◽  
Nitrogen And Phosphorus

Tree ring to climate relationships of Aleppo pine (Pinus halepensis Mill.) in Greece

2001 ◽  
Vol 27 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Andreas Papadopoulos ◽  
Françoise Serre-Bachet ◽  
Lucien Tessier
Keyword(s):  
Tree Ring ◽  
Pinus Halepensis ◽  
Aleppo Pine

A comparative study of the effects of fire retardants on the pyrolysis of cellulose and Pinus halepensis pine-needles

1995 ◽  
Vol 31 ◽  
pp. 85-100 ◽  
Author(s):  
A.A. Pappa ◽  
N.E. Tzamtzis ◽  
M.K. Statheropoulos ◽  
S.E. Liodakis ◽  
G.K. Parissakis
Keyword(s):  
Comparative Study ◽  
Pinus Halepensis ◽  
Pine Needles ◽  
Fire Retardants

Litter decomposition and nutrient release in a tropical rainforest, Southern Bakundu Forest Reserve, Cameroon

1995 ◽  
Vol 11 (3) ◽  
pp. 333-350 ◽  
Author(s):  
Nicholas C. Songwe ◽  
D. U. U. Okali ◽  
F. E. Fasehun
Keyword(s):  
Forest Floor ◽  
Tropical Rainforest ◽  
Great Influence ◽  
Wood Decay ◽  
Nutrient Release ◽  
Dry Weight ◽  
Nitrogen And Phosphorus ◽  
Forest Reserve ◽  
Ceiba Pentandra ◽  
Terminalia Superba

ABSTRACTDecomposition of litter on the forest floor and of leaves of five species, Celtis zenkeri, Cola lepidota, Desbordesia glaucescens, Ceiba pentandra and Terminalia superba in nylon mesh bags, as well as wood decay were studied in the tropical rainforest at Southern Bakundu Forest Reserve, Cameroon.The rate of loss of dry matter was fastest in Celtis zenkeri which was significantly different from the other species, while potassium was the most rapidly released element from all species with more than 50% being released in the first two months of the experiment. Nitrogen and phosphorus showed initial increases in bagged leaf litter independent of dry weight losses and while nitrogen was later released phosphorus continued to increase reaching 2–3 times the initial concentration. Decomposition constant (k) of litter on the forest floor was found to be 2.23 whereas the mean decomposition constants of the different species were as follows: Celtis zenkeri 4.18, Cola lepidota 2.18, Desbordesia glaucescens 1.60 and Ceiba pentandra 2.16 for the two experiments.Termites were found to have a very great influence on the decay of the wood of Terminalia superba with decay due to micro-organisms being negligible.

Frost hardening and resistance in three Aleppo pine (Pinus halepensis Mill.) provenances

2001 ◽  
Vol 49 (3) ◽  
pp. 179-186
Author(s):  
ELENA PAOLETTI ◽  
ROBERTO CALAMASSI ◽  
SARA STRATI
Keyword(s):  
Pinus Halepensis ◽  
Aleppo Pine ◽  
Frost Hardening

scholarly journals Structural variability of Aleppo pine stands in two forests in northeastern Algeria

2020 ◽  
Vol 21 (6) ◽  
Author(s):  
Malika Rached Kanouni ◽  
Insaf Hani ◽  
Ratiba BOUSBA ◽  
Amina Beldjazia ◽  
Hichem KHAMAR
Keyword(s):  
Pinus Halepensis ◽  
Small Diameter ◽  
Basal Area ◽  
Aleppo Pine ◽  
Regeneration Rate ◽  
Tree Diameter ◽  
Total Height ◽  
Structural Variability ◽  
Pine Stands ◽  
Northeastern Algeria

Abstract. Rached-Kanouni M, Hani I, Bousba R, Beldjazia A, Khammar H. 2020. Structural variability of Aleppo pine stands in two forests in northeastern Algeria. Biodiversitas 21: 2848-2853. The layout of the stand can be described as the width of the trees, their reciprocal locations, diametric distinction and height. The goal of this study is to recognize changes in the Pinus halepensis spatial and demographic systems in two Beni Oudjana and Chettaba Forests, located in northeast Algeria. An inventory of trees in these forest formations with P. halepensis dominance was carried out based on dendrometric parameters such as total height, tree diameter at dbh ≥ 5 cm, basal area, total volume, etc., as well as the number of trees in the forest. Tree diameter and height measurements were made on 12 rectangular plots (20 m × 20 m), located in both forests. The results obtained show that the mean stand density, mean diameter, basal area and total volume are higher in Chettaba Forest, the values attributed to these parameters are respectively (422 trees/ha, 27.07 cm, 26, 86 m2, 251.63 m3); while the total height and regeneration rate show significantly higher values in Beni Oudjana Forest (18.97 m, 607 individuals/ha). The structure in diameter and height of the species is bell-shaped to asymmetrically positive with a predominance of small diameter individuals in the Chettaba forest. On the other hand, in the Beni Oudjana Forest, the structure is ‘L’ shaped, showing a predominance of very small diameter individuals. These results indicate that the low regeneration rate of P. halepensis in the Chettaba Forest is due to anthropogenic pressures that favor the degradation of this forest.

scholarly journals Production and application of manure nitrogen and phosphorus in the United States since 1860

2021 ◽  
Vol 13 (2) ◽  
pp. 515-527
Author(s):  
Zihao Bian ◽  
Hanqin Tian ◽  
Qichun Yang ◽  
Rongting Xu ◽  
Shufen Pan ◽  
...  
Keyword(s):  
United States ◽  
Greenhouse Gas Emission ◽  
Nutrient Balance ◽  
Animal Manure ◽  
The United States ◽  
Accurate Estimation ◽  
Total Production ◽  
Nitrogen And Phosphorus ◽  
Southern Us ◽  
Multiple Data

Abstract. Livestock manure nitrogen (N) and phosphorus (P) play an important role in biogeochemical cycling. Accurate estimation of manure nutrient is important for assessing regional nutrient balance, greenhouse gas emission, and water environmental risk. Currently, spatially explicit manure nutrient datasets over a century-long period are scarce in the United States (US). Here, we developed four datasets of annual animal manure N and P production and application in the contiguous US at a 30 arcsec resolution over the period of 1860–2017. The dataset combined multiple data sources including county-level inventory data as well as high-resolution livestock and crop maps. The total production of manure N and P increased from 1.4 Tg N yr−1 and 0.3 Tg P yr−1 in 1860 to 7.4 Tg N yr−1 and 2.3 Tg P yr−1 in 2017, respectively. The increasing manure nutrient production was associated with increased livestock numbers before the 1980s and enhanced livestock weights after the 1980s. The manure application amount was primarily dominated by production, and its spatial pattern was impacted by the nutrient demand of crops. The intense-application region mainly enlarged from the Midwest toward the southern US and became more concentrated in numerous hot spots after the 1980s. The South Atlantic–Gulf and Mid-Atlantic basins were exposed to high environmental risks due to the enrichment of manure nutrient production and application from the 1970s to the period of 2000–2017. Our long-term manure N and P datasets provide detailed information for national and regional assessments of nutrient budgets. Additionally, the datasets can serve as the input data for ecosystem and hydrological models to examine biogeochemical cycles in terrestrial and aquatic ecosystems. Datasets are available at https://doi.org/10.1594/PANGAEA.919937 (Bian et al., 2020).

scholarly journals Does Mixing Tree Species Affect Water Storage Capacity of the Forest Floor? Laboratory Test of Pine-Oak and Fir-Beech Litter Layers

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1674
Author(s):  
Anna Ilek ◽  
Małgorzata Szostek ◽  
Anna Mikołajczyk ◽  
Marta Rajtar
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Tree Species ◽  
Forest Floor ◽  
Storage Capacity ◽  
Water Storage ◽  
Pine Needles ◽  
Litter Layer ◽  
Water Storage Capacity ◽  
Organic Debris

During the last decade, tree species mixing has been widely supported as a silvicultural approach to reduce drought stress. However, little is known on the influence of tree species mixing on physical properties and the water storage capacity of forest soils (including the forest floor). Thus, the study aimed to analyze the effect of mixing pine needles and oak leaves and mixing fir needles and beech leaves on hydro-physical properties of the litter layer during laboratory tests. We used fir-beech and pine-oak litter containing various shares of conifer needles (i.e., 0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100%) to determine the influence of the needle admixture on bulk density, total porosity, macroporosity, water storage capacity, the amount of water stored in pores between organic debris and the degree of saturation of mixed litter compared to broadleaf litter (oak or beech). We found that the admixture of fir needles increased the bulk density of litter from 7.9% with a 5% share of needles to 55.5% with a 50% share (compared to pure beech litter), while the share of pine needles < 40% caused a decrease in bulk density by an average of 3.0–11.0% (compared to pure oak litter). Pine needles decreased the water storage capacity of litter by about 13–14% with the share of needles up to 10% and on average by 28% with the 40 and 50% shares of pine needles in the litter layer. Both conifer admixtures reduced the amount of water stored in the pores between organic debris (pine needles more than fir needles).

scholarly journals Effects of Coal and Sewage Sludge Ashes on Macronutrient Content in Maize (Zea mays L.) Grown on Soil Contaminated with Eco-Diesel Oil

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 525
Author(s):  
Mirosław Wyszkowski ◽  
Jadwiga Wyszkowska ◽  
Natalia Kordala ◽  
Agata Borowik
Keyword(s):  
Zea Mays ◽  
Sewage Sludge ◽  
Zea Mays L ◽  
Maize Yield ◽  
Diesel Oil ◽  
Hard Coal ◽  
Slight Reduction ◽  
Nitrogen And Phosphorus ◽  
Soil Enrichment ◽  
Sludge Incineration

Petroleum hydrocarbons, as aggressive components of diesel oils, after migration to the land environment can alter the activity and efficiency of ecosystems. They can also be dangerous to animal and human health. Eco-friendly methods for the reclamation of affected soils is necessary to manage degraded lands. One such method is the use of ashes. The aim of this research was to determine how soil pollution with diesel oil (brand name, Eco-Diesel) affects the chemical composition of maize (Zea mays L.) and whether the application of ash from a combined heat and power plant, as well as from sewage sludge incineration, could reduce the potentially adverse impact of diesel oil on plants. The research results demonstrated that soil contamination with Eco-Diesel oil modified the content of selected macronutrients in the analyzed crop plant. Eco-Diesel oil had a negative effect on maize yield. The highest diesel oil dose in a series without neutralizing substances had a positive effect on the accumulation of most elements, except nitrogen and sodium. Soil enrichment with ash differentiated the content of macronutrients, mainly nitrogen and phosphorus, in the aerial biomass of maize. The ashes increased the yield of maize and content of some macronutrients, mainly nitrogen but also calcium, the latter in a series where soil was treated with ash from sewage sludge thermal recycling. Both types of ash also resulted in a decrease in the plant content of phosphorus, while ash from hard coal caused a slight reduction in the content of potassium in maize. Ash of different origins can be an effective solution in the reclamation of degraded soils, which may then be used for growing energy crops.

Sign in / Sign up

Export Citation Format

Share Document