scholarly journals Effect of sprinkler irrigation on the properties of leached chernozem and the yield of Bromopsis inermis Leyss. in the Southern Cis-Ural

Author(s):  
Alexander Komissarov ◽  
Mikhail Komissarov ◽  
Irek Minniakhmetov ◽  
Oleg Lykasov ◽  
Julia Afanasyeva

The paper examines the effect of the long-term (10 years) low-intensity sprinkler irrigation on the properties of leached chernozem soils covered with Bromopsis inermis Leyss. (BIL) stands in the Southern Cis-Ural forest-steppe. The study analysed changes in the soil’s agrophysical and chemical properties. As a result of long-term irrigation, the humus horizon (A + AB) thickness increased by 16 ± 3 cm; the organic carbon (Corg) content and nutrients decreased in this rooting zone, in particular, Corg by 0.3%, available phosphorus by 24.8 mg/kg, exchangeable potassium by 18.4 mg/kg and the stock of Corg by 16 t/ha. The particle size distribution of irrigated soil did not significantly changed; some changes were observed for the soil’s aggregate composition. The soil’s hydrophysical properties, water and air regime worsened.

2019 ◽  
Vol 35 (4) ◽  
Author(s):  
Willian Barros Nascimento ◽  
Milton César Costa Campos ◽  
Bruno Campos Mantovanelli ◽  
Luís Antônio Coutrim dos Santos ◽  
José Mauricio Cunha ◽  
...  

The Amazon region has a great diversity of landscapes such as forests galleries, natural fields (“Cerrados Amazônicos”), dense forest, these environments made possible the formation of a broad class of soils over time. The aim of this study was to evaluate the physical and chemical properties of soils in different physiographic environments in southern Amazonas, Brazil. Three areas of representative physiographies were selected, all of them in natural conditions: natural field / forest and floodplain / dry land transitions, and corrugated relief areas. Soil samples were collected in layers of 0.0 to 0.20 and 0.80-1.0 m. From the samples collected the following physical analyzes were performed: particle size, bulk density, particle density, total porosity and saturated hydraulic conductivity; and chemical: exchangeable calcium, magnesium, aluminum and potassium available, phosphorus, potential acidity, pH and organic carbon. Based on the results of chemical analysis were calculated the sum of bases and base saturation. The results were submitted to multivariate statistics analysis, at the discretion of the principal component analysis (PCA). From the results it is clear that different physiographic environments studied influence the formation of different soil classes, featuring the diversity of Amazonian soils. The PCA allowed the distinction and formation of different similarity groups, thus enabling to relate the physical and chemical properties with the physiographic formation in which they are inserted.


2011 ◽  
Vol 23 (5) ◽  
pp. 628-637 ◽  
Author(s):  
Shin-Che Huang ◽  
Francis P. Miknis ◽  
William Schuster ◽  
Stephen Salmans ◽  
Michael Farrar ◽  
...  

2015 ◽  
Vol 27 (9) ◽  
pp. 04014248 ◽  
Author(s):  
Yuhong Wang ◽  
Yong Wen ◽  
Kecheng Zhao ◽  
Dan Chong ◽  
Jianming Wei

Geoderma ◽  
2019 ◽  
Vol 344 ◽  
pp. 127-136 ◽  
Author(s):  
Laura Giagnoni ◽  
Anita Maienza ◽  
Silvia Baronti ◽  
Francesco Primo Vaccari ◽  
Lorenzo Genesio ◽  
...  

2020 ◽  
Vol 8 (2) ◽  
pp. 185-194 ◽  
Author(s):  
Ana Clara Sokolowski ◽  
Barbara Prack McCormick ◽  
Javier De Grazia ◽  
José E. Wolski ◽  
Hernán A. Rodríguez ◽  
...  

Author(s):  
Juliany Barbosa de Pinho ◽  
Aloisio Bianchini ◽  
Pedro Silvério Xavier Pereira ◽  
Letycia Cunha Nunes ◽  
Rodrigo Fernandes Daros ◽  
...  

From the pyrolysis process, biochar is a carbon rich and recalcitrant organic material with potential for long term carbon sequestration because of its aromatic structure. However, the physical and chemical properties of the biochar vary due to the diversity of raw material and the conditions of production. The present study aimed to evaluate the biochar from the sugarcane bagasse at different temperatures and under two conditions of pyrolysis. The biochar was produced at two final temperatures 200°C (1 hour); 250°C (1h) and 250°C (2h), with pyrolysis of an oxidizing and non-oxidizing atmosphere for both. PH, cation exchange capacity (CTC), carbon content (C), Nitrogen (N), hydrogen (H), H:C, C:N and ash ratios were evaluated. The contents of C, H, N and the atomic ratios H:C and C:N were higher in Biochar produced in a non-oxidizing atmosphere (BNO). However, the content of ash, pH and CTC were higher in Biochar produced in oxidizing atmospheres (BO). One can conclude the direct influence of the pyrolysis condition.


1999 ◽  
Vol 29 (3) ◽  
pp. 300-308 ◽  
Author(s):  
M. Šimek ◽  
D. W. Hopkins ◽  
J. Kalčík ◽  
T. Picek ◽  
H. Šantrůčkov& ◽  
...  

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