Short-term potassium release and fixation in some calcareous soils

2007 ◽  
Vol 170 (4) ◽  
pp. 530-537 ◽  
Author(s):  
Mohsen Jalali ◽  
Zahra Kolahchi
Keyword(s):  
Calcareous Soils ◽  
Short Term ◽  
Potassium Release

scholarly journals Short term recovery of soil physical, chemical, micro- and mesobiological functions in a new vineyard under organic farming

2014 ◽  
Vol 1 (1) ◽  
pp. 1165-1201 ◽  
Author(s):  
E. A. C. Costantini ◽  
A. E. Agnelli ◽  
A. Fabiani ◽  
E. Gagnarli ◽  
S. Mocali ◽  
...  
Keyword(s):  
Central Italy ◽  
Calcareous Soils ◽  
Vitis Vinifera L ◽  
Microbiological Analysis ◽  
Soil Functions ◽  
Short Term ◽  
Equilibrium Conditions ◽  
Soil Features ◽  
Physical And Chemical ◽  
Organically Managed

Abstract. Deep earthwork activities carried out before vineyard plantation can severely upset soil profile properties. As a result, soil features in the root environment are often much more similar to those of the underlying substratum than those of the original profile. The time needed to recover the original soil functions is ecologically relevant and may strongly affect vine phenology and grape yield, particularly under organic viticulture. The general aim of this work was to investigate soil resilience after vineyard pre-planting earthworks. In particular, an old and a new vineyard, established on the same soil type, were compared over a five year period for soil chemical, physical, micro and mesobiological properties. The investigated vineyards (Vitis vinifera L., cv. Sangiovese) were located in the Chianti Classico district (Central Italy), on stony and calcareous soils and were not irrigated. The older vineyard was planted in 2000, after slope reshaping by bulldozing and back hoe ploughing down to about 0.8–1.0 m. The new vineyard was planted in 2011, after equivalent earthwork practices carried out in the summer of 2009. Both vineyards were organically managed and fertilized only with compost every autumn (1000 kg ha−1 per year). The new vineyard was cultivated by periodic tillage, while the old vineyard was managed with alternating grass-covered and tilled inter-rows. Soil samples were collected at 0–15 cm depth from the same plots of the new and old vineyards, during the springtime from 2010 to 2014. The old vineyard was sampled in both the tilled and the grass-covered swaths. According to the results from physical and chemical analyses, the new vineyard, during the whole 2010–2014 period, showed lower TOC, N, C/N and EC values, along with higher silt and total CaCO3 contents than the old vineyard, suggesting still evolving equilibrium conditions. The microarthropod analysis showed significantly different abundances and communities' structures, in relation to both vineyard and time, increasing with rain precipitations in the old vineyard. Though the euedaphic forms, well adapted to soil life, were always rare. Microbiological analysis revealed a different structure of eubacterial communities between old and new vineyard in the whole period. However, the DGGE similarity values of such communities increased of about 2.5% per year, suggesting that at least 3 years more are needed to compare intra- and inter-specific diversity of the two vineyards. In conclusion, the consequences of deep earthworks on soil chemical, micro and mesobiological properties were still evident after four years from planting, indicating that more time is necessary for the recovery of soil functions, probably longer than that needed to obtain an economic grape production.

Potassium release from sand, silt and clay fractions in calcareous soils of southern Iran

2012 ◽  
Vol 58 (12) ◽  
pp. 1439-1454 ◽  
Author(s):  
Mahdi Najafi Ghiri ◽  
Ali Abtahi ◽  
Soheila Sadat Hashemi ◽  
Fatemeh Jaberian
Keyword(s):  
Calcareous Soils ◽  
Potassium Release ◽  
Southern Iran

scholarly journals Kinetics of Non-exchangable Potassium Release in Aggregates with Different Sizes in a Number of Calcareous Soils

2018 ◽  
Vol 22 (1) ◽  
pp. 267-278
Author(s):  
S. Z. Atar Shahraki ◽  
A. R. Hosseinpur ◽  
H. R. Motaghian ◽  
Sh. Ghorbani ◽  
◽  
...  
Keyword(s):  
Calcareous Soils ◽  
Potassium Release ◽  
Kinetics Of

Potassium fixation of some calcareous soils after short term extraction with different solutions

2018 ◽  
Vol 65 (7) ◽  
pp. 897-910 ◽  
Author(s):  
Mahdi Najafi-Ghiri ◽  
Soodabeh Rezabigi ◽  
Sara Hosseini ◽  
Hamid Reza Boostani ◽  
Hamid Reza Owliaie
Keyword(s):  
Calcareous Soils ◽  
Short Term ◽  
Potassium Fixation ◽  
Term Extraction
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