RELATIONSHIPS BETWEEN COPPER CONTENTS, RATES OF SOIL RESPIRATION AND PHOSPHATASE ACTIVITIES OF SOME HISTOSOLS IN AN AREA OF SOUTHWESTERN QUEBEC IN THE SUMMER AND THE FALL

1978 ◽  
Vol 58 (2) ◽  
pp. 125-134 ◽  
Author(s):  
S. P. MATHUR ◽  
R. B. SANDERSON
Keyword(s):  
Organic Matter ◽  
Acid Phosphatase ◽  
Soil Respiration ◽  
Soil Enzymes ◽  
Organic Soils ◽  
Biochemical Activity ◽  
Phosphatase Activities ◽  
Mineralization Of Organic Matter ◽  
Different Levels ◽  
Phosphatase Enzyme

Samples from 17 fields of organic soils (Histosols) were collected on the same day between rows of crops in the summer of 1976 from the environs of Ste. Clothilde, Quebec. Thirty-three properties of the soils were examined for possible correlations. The copper contents of the samples were found to have statistically significant negative correlations with their rates of respiration which were measured as carbon lost as CO2 upon incubation at 21 ± 2 °C. The acid phosphatase enzyme contents in these Histosol samples at each of three different levels of soil biochemical activity were also similarly negatively correlated with their copper concentrations. The above results were confirmed almost without exception by the data obtained by similar analysis of seven samples collected from the same area in the fall of 1976 when the fields were bare. The results supported an earlier suggestion of Mathur and Rayment (1977) that copper application (at a few quintals/ha) be investigated as a means of mitigating the mineralization and subsidence of some organic soils. Apparently, the added Cu may inactivate some of the exocellular soil enzymes which normally contribute to the degradation and mineralization of organic matter.

scholarly journals Potassium Fertilizer Recommendations for Sugarcane on Florida Organic Soils

EDIS ◽  
2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
James Mabry McCray
Keyword(s):  
Organic Matter ◽  
Plant Growth ◽  
Agricultural Area ◽  
Organic Soils ◽  
Plant Nutrient ◽  
Potassium Fertilizer ◽  
Everglades Agricultural Area ◽  
Low Concentrations ◽  
Fertilizer Recommendations ◽  
Mineralization Of Organic Matter

Potassium is a primary plant nutrient that is required in large amounts by sugarcane. About 74% of the 400,000 acres of Florida sugarcane is grown on organic soils in the Everglades Agricultural Area. Potassium is not a component of organic matter and virgin Histosols contain very low concentrations of K, so release of K through mineralization of organic matter in these soils is not an adequate K source for plant growth. This 7-page document presents revised potassium fertilizer recommendations for sugarcane grown on Florida organic soils along with supporting information. Written by J. Mabry McCray, and published by the UF/IFAS Agronomy Department, February 2019.  http://edis.ifas.ufl.edu/ag428

scholarly journals Enzyme activities of urban soils under different land use in the Shenzhen city, China

2008 ◽  
Vol 54 (No. 8) ◽  
pp. 341-346 ◽  
Author(s):  
Z.J. Shi ◽  
Y. Lu ◽  
Z.G. Xu ◽  
S.L. Fu
Keyword(s):  
Organic Matter ◽  
Acid Phosphatase ◽  
Soil Organic Matter ◽  
Direct Effect ◽  
Soil Ph ◽  
Soil Enzymes ◽  
Urban Soils ◽  
Urban Park ◽  
Shenzhen City ◽  
Positive Direct

Urbanization has drastically changed soil properties, and an assessment of these changes is essential for soil management and soil health. The activities of urease, acid phosphatase, invertase and catalase, soil organic matter, pH, electrical conductivity (EC) and clay (< 0.01 mm) content of urban soils under two land-uses in the central built-up area of the Shenzhen city were investigated, and multivariate analysis was used to study the relationship between soil enzymes and soil physical-chemical properties. The results showed that invertase activity in roadside soil was significantly higher than that in urban park soil, whereas catalase activity was significantly higher in urban park soil. Soil organic matter had significant positive correlation with activities of invertase, urease and acid phosphatase but not with catalase. Soil pH had a significant negative direct effect on urease and acid phosphatase activity, but the effect was counteracted by positive indirect effect of soil organic matter. Soil EC had a positive direct effect on activities of catalase and there was a significant correlation between soil EC and soil catalase activities. Soil organic matter, soil pH and EC were the major factors influencing activities of soil enzymes.

scholarly journals Effect of Peatland Siltation on Total and Labile C, N, P and K

2021 ◽  
Vol 13 (15) ◽  
pp. 8240
Author(s):  
Slawomir Smolczynski ◽  
Barbara Kalisz ◽  
Pawel Urbanowicz ◽  
Miroslaw Orzechowski
Keyword(s):  
Organic Matter ◽  
Biological Activity ◽  
Microwave Digestion ◽  
Hot Water ◽  
Biologically Active ◽  
Organic Soils ◽  
Labile C ◽  
Mineralization Of Organic Matter ◽  
C And N ◽  
Total P

Large areas of peatlands, in addition to the effect of drainage, were subjected to erosional process and were silted. The objective of the study was to verify whether siltation of peatlands hampers mineralization of remaining peat and alters labile C, N, P and K. Total C and N were measured on a CN analyzer, and total P and K on an ICP spectrometer after microwave digestion. The labile fractions of C, N, P and K were extracted with hot water and measured on the CN analyzer and ICP spectrometer. We noted that labile C, N, P and K concentrations in silted topsoil were lower than the values reported in unsilted topsoil. Higher concentration of labile compounds in peats is a signal of higher biological activity and mineralization of organic matter. A TOC/TP < 300 and TOC/TN of approximately 8 in topsoil suggested diminished mineralization and supported our hypothesis that siltation hampered mineralization of organic matter. The TOC/TK ratio proved to be a fine indicator of the state of organic soils siltation, which enabled the separation of unsilted peats from silted topsoil (on the base of value of 177). It can be assumed that the mineralization of peat layers is hampered by the above lying silted topsoil, which is less biologically active, having less oxygen, and therefore conserving underlying peats against oxidation.

scholarly journals Comparing organic versus conventional soil management on soil respiration

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 258 ◽  
Author(s):  
Bence Mátyás ◽  
Maritza Elizabeth Chiluisa Andrade ◽  
Nora Carmen Yandun Chida ◽  
Carina Maribel Taipe Velasco ◽  
Denisse Estefania Gavilanes Morales ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Soil Properties ◽  
Organic Material ◽  
Chemical Properties ◽  
Soil Management ◽  
Co2 Production ◽  
Organic Soils ◽  
Physical Chemical ◽  
Organic Farmers

Soil management has great potential to affect soil respiration. In this study, we investigated the effects of organic versus conventional soil management on soil respiration.  We measured the main soil physical-chemical properties from conventional and organic managed soil in Ecuador. Soil respiration was determined using alkaline absorption according to Witkamp.  Soil properties such as organic matter, nitrogen, and humidity, were comparable between conventional and organic soils in the present study, and in a further analysis there was no statically significant correlation with soil respiration. Therefore, even though organic farmers tend to apply more organic material to their fields, but this did not result in a significantly higher CO2 production in their soils in the present study.

scholarly journals Enzymatic activity and culturable bacteria diversity in rhizosphere of amaranth, as indicators of crop phenological changes

2018 ◽  
Vol 96 (4) ◽  
pp. 640
Author(s):  
Iván Pável Moreno-Espíndola ◽  
María Jesús Ferrara-Guerrero ◽  
Fernando De León-González ◽  
Facundo Rivera-Becerril ◽  
Lino Mayorga-Reyes ◽  
...  
Keyword(s):  
Organic Matter ◽  
Acid Phosphatase ◽  
Soil Organic Matter ◽  
Enzymatic Activity ◽  
Plant Performance ◽  
Culturable Bacteria ◽  
Phosphatase Activities ◽  
Amaranthus Hypochondriacus ◽  
Loose Soil ◽  
Rhizosphere Environment

<p><strong>Background</strong>: Amaranth is a plant of interest in farming due to its ability to adapt into arid and semi-arid climates. Biological activity by microorganisms in rhizosphere determines plant performance and quality.</p><p><strong>Hypothesis:</strong> The enzymatic activity is different in two types of soil, rhizosheath soil (adhered by roots) and loose soil (non-adhered by roots), in four cropping periods of amaranth.</p><p><strong>Species study:</strong> <em>Amaranthus hypochondriacus</em> L.</p><p><strong>Methods:</strong> Parameters of soil organic matter and several enzyme activities in the amaranth rhizosphere were assessed. Two types of soil, rhizosheath soil and loose soil, and four cropping periods were compared. Thirty-seven culturable bacterial isolates obtained from rhizosheath soil were molecularly identified.</p><p><strong>Results:</strong> Rhizosheath soil had higher content of carbon and total nitrogen compared with loose soil; however, potential enzyme activity in both soil types was similar. Dehydrogenase and acid phosphatase activities were very sensitive to the crops phenological stages. Acid and alkaline phosphatases, cellulase and protease activities correlated to changes in soil moisture. The greatest diversity of culturable bacteria was found during the flowering stage.</p><strong>Conclusions:</strong> In the rhizosphere of <em>A. hypochondriacus</em> grown in a pumiceous sandy soil, enzymatic activities in the rhizosheath and loose soils were similar, which must be considered a unique rhizosphere environment. Dehydrogenase and acid phosphatase activities were highly sensitive to changes in the crop phenology. The behavior of phosphatases and dehydrogenase activities suggests an increased dynamic soil organic matter (SOM) during the post-harvest period. In the amaranth rhizosphere, native culturable bacteria are involved in the breakdown of SOM.

Forest thinning and organic matter manipulation drives changes in soil respiration in a Larix principis-rupprechtii plantation in China

2021 ◽  
Vol 211 ◽  
pp. 104996
Author(s):  
Xiaoqin Cheng ◽  
Hairong Han ◽  
Jiang Zhu ◽  
Xinhao Peng ◽  
Bin Li ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Forest Thinning

Smartphone Based Highly Sensitive Visualized Detection of Acid Phosphatase Enzyme Activity

2021 ◽  
Author(s):  
Rui Li ◽  
Yanan Sun ◽  
Lihua Jin ◽  
Xiaohong Qiao ◽  
Cong Li ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Acid Phosphatase ◽  
Point Of Care ◽  
Rapid Development ◽  
Practical Application ◽  
Fast Analysis ◽  
Highly Sensitive ◽  
Visualized Detection ◽  
Sensitive Method ◽  
Phosphatase Enzyme

With the rapid development of point-of-care (POC) technologies, the improvement of sensitive method featured with fast analysis and affordable devices has become an emerging requirement for the practical application. In...

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