scholarly journals Soil Nutrient Depletion Is Associated with the Presence of Burkholderia pseudomallei

2016 ◽  
Vol 82 (24) ◽  
pp. 7086-7092 ◽  
Author(s):  
Viriya Hantrakun ◽  
Patpong Rongkard ◽  
Malinee Oyuchua ◽  
Premjit Amornchai ◽  
Cherry Lim ◽  
...  
Keyword(s):  
Organic Matter ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Soil Nutrients ◽  
Burkholderia Pseudomallei ◽  
Agricultural Practices ◽  
Rice Fields ◽  
Soil Physicochemical Properties ◽  
Content Type ◽  
Calcium Magnesium

ABSTRACTBurkholderia pseudomalleiis a soil-dwelling bacterium and the cause of melioidosis, which kills an estimated 89,000 people per year worldwide. Agricultural workers are at high risk of infection due to repeated exposure to the bacterium. Little is known about the soil physicochemical properties associated with the presence or absence of the organism. Here, we evaluated the soil physicochemical properties and presence ofB. pseudomalleiin 6,100 soil samples collected from 61 rice fields in Thailand. The presence ofB. pseudomalleiwas negatively associated with the proportion of clay, proportion of moisture, level of salinity, percentage of organic matter, presence of cadmium, and nutrient levels (phosphorus, potassium, calcium, magnesium, and iron). The presence ofB. pseudomalleiwas not associated with the level of soil acidity (P= 0.54). In a multivariable logistic regression model, the presence ofB. pseudomalleiwas negatively associated with the percentage of organic matter (odds ratio [OR], 0.06; 95% confidence interval [CI], 0.01 to 0.47;P= 0.007), level of salinity (OR, 0.06; 95% CI, 0.01 to 0.74;P= 0.03), and percentage of soil moisture (OR, 0.81; 95% CI, 0.66 to 1.00;P= 0.05). Our study suggests thatB. pseudomalleithrives in rice fields that are nutrient depleted. Some agricultural practices result in a decline in soil nutrients, which may impact the presence and amount ofB. pseudomalleibacteria in affected areas.IMPORTANCEBurkholderia pseudomalleiis an environmental Gram-negative bacillus and the cause of melioidosis. Humans acquire the disease following skin inoculation, inhalation, or ingestion of the bacterium in the environment. The presence ofB. pseudomalleiin soil defines geographic regions where humans and livestock are at risk of melioidosis, yet little is known about the soil properties associated with the presence of the organism. We evaluated the soil properties and presence ofB. pseudomalleiin 61 rice fields in East, Central, and Northeast Thailand. We demonstrated that the organism was more commonly found in soils with lower levels of organic matter and nutrients, including phosphorus, potassium, calcium, magnesium, and iron. We also demonstrated that crop residue burning after harvest, which can reduce soil nutrients, was not uncommon. Some agricultural practices result in a decline in soil nutrients, which may impact the presence and amount ofB. pseudomalleibacteria in affected areas.

Correlation of pH on Soil Physicochemical Properties using Linear Regression Model for Spectral Data Analysis

2021 ◽  
Vol 10 (1) ◽  
pp. 3492-3500
Author(s):  
Vipin Y. Borole ◽  
◽  
Sonali B. Kulkarni ◽  
Keyword(s):  
Linear Regression ◽  
Plant Growth ◽  
Physicochemical Properties ◽  
Regression Model ◽  
Soil Properties ◽  
Spectral Data ◽  
Linear Regression Model ◽  
Soil Analysis ◽  
Soil Physicochemical Properties ◽  
Analytical Technique

Soil properties may be varied by spatially and temporally with different agricultural practices. An accurate and reliable soil properties assessment is challenging issue in soil analysis. The soil properties assessment is very important for understanding the soil properties, nutrient management, influence of fertilizers and relation between soil properties which are affecting the plant growth. Conventional laboratory methods used to analyses soil properties are generally impractical because they are time-consuming, expensive and sometimes imprecise. On other hand, Visible and infrared spectroscopy can effectively characterize soil. Spectroscopic measurements are rapid, precise and inexpensive. Soil spectroscopy has shown to be a fast, cost-effective, environmentally friendly, non-destructive, reproducible and repeatable analytical technique. In the present research, we use spectroscopy techniques for soil properties analysis. The spectra of agglomerated farming soils were acquired by the ASD Field spec 4 spectroradiometer. Different fertilizers treatment applied soil samples are collected in pre monsoon and post monsoon season for 2 year (4 season) for banana and cotton crops in the form of DS-I and DS-II respectively. The soil spectra of VNIR region were preprocessed to get pure spectra. Then process the acquired spectral data by statistical methods for quantitative analysis of soil properties. The detected soil properties were carbon, Nitrogen, soil organic matter, pH, phosphorus, potassium, moisture sand, silt and clay. Soil pH is most important chemical properties that describe the relative acidity or alkalinity of the soil. It directly effect on plant growth and other soil properties. The relationship between pH properties on soil physical and chemical parameters and their influence were analyses by using linear regression model and show the performance of regression model with R2 and RMSE. Keywords soil; physicochemical properties; spectroscopy; pH

scholarly journals Soil mixing with organic matter amendment improves Albic soil physicochemical properties and crop yield in Heilongjiang province, China

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0239788
Author(s):  
Qingying Meng ◽  
Hongtao Zou ◽  
Chunfeng Zhang ◽  
Baoguo Zhu ◽  
Nannan Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Physicochemical Properties ◽  
Crop Yield ◽  
Heilongjiang Province ◽  
Soil Physicochemical Properties ◽  
Soil Mixing ◽  
Albic Soil

Effects of Ecological Projects on Grassland Soil Physicochemical Properties in Three-River Headwater

2013 ◽  
Vol 807-809 ◽  
pp. 843-847
Author(s):  
Xu Dong Zhao ◽  
De Gang Zhang ◽  
Li Na Shi ◽  
Yong Shun Yang
Keyword(s):  
Organic Matter ◽  
Physicochemical Properties ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Available Phosphorus ◽  
Soil Physicochemical Properties ◽  
Total N ◽  
Effective Measure ◽  
Artificial Grassland

The depth variations of soil physicochemical properties in the degraded native grasslands and the artificially restored grasslands were studied in the Three-river headwater areas of Qinghai-Tibetan plateau, China. The results showed: (1) With the increase of the gradient of restoration years, soil water content, total chemical properties, total potassium, phosphorus, available phosphorus and potassium were increased thereafter in the artificial grasslands. (2) With the increase of grassland degradation gradient, soil water content was gradually reduced, and the total N, K, the organic matter didnt gradually reduced also. (3) Both restoration years and degradation degree didnt influence the nutrient distribution in soil. (4) The organic matter, total N and K of degraded grassland were increased by artificial grassland construction. Therefore, artificial grassland construction canbe used as an effective measure of ecological projects in the Three-river headwater area.

scholarly journals Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations

Forests ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 17
Author(s):  
Jie He ◽  
Quanhou Dai ◽  
Fengwei Xu ◽  
Youjin Yan ◽  
Xudong Peng
Keyword(s):  
Organic Matter ◽  
Physicochemical Properties ◽  
Soil Depth ◽  
Nutrient Cycle ◽  
Stand Age ◽  
Soil Physicochemical Properties ◽  
Soil System ◽  
Masson Pine ◽  
Available Nutrients ◽  
C:P Ratio

Plantations play a vital role in the global nutrient cycle because they have large stocks of soil macronutrients. However, the impacts of plantations on soil macronutrient stocks combined with stand age and soil physicochemical properties have not been well quantified. We compared soil macronutrient stocks at soil depths of 0−20 and 20−40 cm across a 7-, 14-, 25-, and 30-year chronosequence of Masson pine (Pinus massoniana Lamb.) plantations. The results showed that the nitrogen (N), phosphorus (P), and potassium (K) stocks first increased and then decreased with stand age. The highest N and P stocks were observed in the 14-year-old plantation, and the 25-year-old plantation displayed the highest K stock. The C, N, and P stocks declined with increasing soil depth across all sites, whereas the reverse trend was found in the K stock. Carbon stocks were highest for all plantations, followed by the K, N, and P stocks. Plantation soils exhibited a higher C:P ratio and a lower P:K ratio at various soil depths. The dominant controlling factors for the soil macronutrient stocks varied significantly at different stand ages and soil depths according to statistical analysis. For the total soil system, the C stock was affected by the available nutrients, organic matter, and stoichiometry; the available nutrients and organic matter were the determinant factors of the N and P stocks. Aggregate stability could be the primary parameter affecting the K stock. Organic matter explained most of the variation in soil macronutrient stocks, followed by the P:K ratio and available K. Collectively, our results suggest that the response of soil macronutrient stocks to stand age and soil depth will be dependent on different soil physicochemical properties, and P and K may be important limiting factors in Masson pine plantation ecosystems.

scholarly journals Changes in Reconstructed Soil Physicochemical Properties in an Opencast Mine Dump in the Loess Plateau Area of China

2022 ◽  
Vol 19 (2) ◽  
pp. 706
Author(s):  
Yuting Li ◽  
Wenxiang Zhou ◽  
Ming Jing ◽  
Shufei Wang ◽  
Yuhan Huang ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Soil Properties ◽  
Variation Coefficient ◽  
Shanxi Province ◽  
Soil Reclamation ◽  
Soil Porosity ◽  
Soil Physicochemical Properties ◽  
Mining Areas ◽  
Opencast Mine ◽  
Significant Difference

Soil construction and revegetation are essential for ecological restoration in mining areas. The influence of vegetation on the horizontal and vertical distribution patterns of soil properties should be fully understood. However, most studies on reconstructed soils in mining areas only concentrate on the surface soil, without exploring the vertical variations in soil properties. Overall, this study aims to explore the potential mechanisms by which surface vegetation exerts some influence on the spatial distribution of soil physicochemical properties, and to provide some insight into revegetation and soil reclamation in mining areas. Descriptive statistics and one-way analysis of variance (one-way ANOVA) were employed to evaluate the differences in the soil physicochemical properties in horizontal and vertical directions under different land-use types in the south dump of Antaibao opencast mine in Pingshuo, Shanxi Province, China. The main results of this study are as follows: (1) In the horizontal direction, except for the strong variation (variation coefficient ≥ 100%) in soil organic matter (SOM) content at some depths, the degree of variation in other soil physicochemical properties at various depths was moderate or weak (variation coefficient < 100%). The soil physicochemical properties gradually remained constant after years of reclamation. In the vertical direction, the soil bulk density (SBD), soil porosity, SOM content, soil C/N ratio, soil total nitrogen (STN) content, soil available phosphorus (SAP) content, and soil available potassium (SAK) content showed significant variations (p < 0.05) between soil depths. In contrast, no significant difference was found for other physicochemical properties. (2) The SBD, STN, SAK, soil porosity, and soil clay content were significantly different (p < 0.05) under different vegetation cover types, but the influence of vegetation on other soil physicochemical properties seemed to be limited. The results reveal that trees have a stronger ability to reduce soil grain sizes and enhance SAP contents than shrubs or herbs; however, the beneficial effects of herbs on the physicochemical properties of shallow soil are more obvious than those of trees and shrubs. (3) This study indicates that more shrubs and trees should be planted in the areas with low vegetation coverage, and more measures should be taken to improve soil physicochemical properties in order to prevent the occurrence of large-scale degradation. The reconstruction of soil structure should be preferentially considered in the process of soil reconstruction and revegetation in areas under similar conditions. Herbs should first be planted in the early reclamation stage. At the same time, shrubs or trees can be adopted in the middle and late stages of vegetation reconstruction in order to achieve comprehensive revegetation.

scholarly journals Differences in Soil Physicochemical Properties in Different-Aged Pinus massoniana Plantations in Southwest China

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 987
Author(s):  
Xiaoai Yin ◽  
Longshan Zhao ◽  
Qian Fang ◽  
Guijie Ding
Keyword(s):  
Organic Carbon ◽  
Physicochemical Properties ◽  
Bulk Density ◽  
Soil Nutrients ◽  
Southwest China ◽  
Available Phosphorus ◽  
Soil Physicochemical Properties ◽  
Forest Age ◽  
Masson Pine ◽  
Masson Pine Forest

With increasing age, plants will cause changes in soil physicochemical properties. The objective of this study was to investigate differences in the soil physicochemical properties in different-aged Masson pine forest plantations (i.e., 10, 20, 40, and 60 years old). Soil samples were collected in a pure Masson pine forest plantation in Southwest China. The soil determination indexes included organic carbon, nitrogen, phosphorus and potassium contents, water content, bulk density, and pH. The soil pH of a 20-year-old forest was significantly (p < 0.05) higher than that of a 10, 40, and 60-year-old forest. In addition, soil-available phosphorus in a 60-year-old forest was significantly (p < 0.05) higher than that in the other three age forest groups. With increasing forest age, available phosphorus increased, while available nitrogen decreased at 20 years old and then increased at 40 years old. There was a significant positive correlation (p < 0.05) between total nitrogen and available potassium; no significant correlation (p> 0.05) between total phosphorus and total potassium, organic carbon, bulk density, and pH; and a significant negative correlation (p < 0.05) between available phosphorus and the water content. The availability and utilization efficiency of soil nutrients in young forests were higher than those in old forests and the intermediate forest age was an important time point that affected the soil properties. To improve the availability of soil nutrients and ensure the sustainable utilization of soil resources, it is necessary to increase the input of nitrogen and especially phosphorus. More attention should be given to the phytochemometric response with respect to the age of plantations.

scholarly journals Soil physicochemical properties under eucalyptus tree species planted in alley maize cropping agroforestry practice in Decha Woreda, Kaffa zone, southwest Ethiopia

2021 ◽  
Vol 10 (2) ◽  
pp. 7-14
Author(s):  
A Alemayhu ◽  
G Yakob
Keyword(s):  
Physicochemical Properties ◽  
Soil Nutrients ◽  
Tree Species ◽  
Soil Depth ◽  
Rotation Period ◽  
Soil Samples ◽  
Soil Physicochemical Properties ◽  
Total N ◽  
Significant Difference ◽  
Open Land

Different studies have shown that the effect of eucalyptus trees on soil physicochemical properties is variable, which indicates that more investigations that focus on different specific geographical locations and eucalyptus tree species are required. The objectives of this study was to evaluate the status of soil nutrients under four eucalyptus tree species planted in hedgerow system in comparison with that in its adjacent open land. To achieve these objectives, soil samples were taken from a soil depth of 0-20 cm from 15-20 spots by using auger and composited for respective treatments. Each soil samples analyzed at Teppi soil laboratory following standard procedures. Analysis of variance (ANOVA) and treatments separation were made by using Least Significance Difference (LSD) at 95% probability level. The analysis result indicated that there were no significance differences between Eucalyptus tree species and its adjacent open land in the level of soil nutrients (total N, available P, pH, OM, soil moisture and OC) (p<0.05). The only significant difference recorded between Eucalyptus tree species and its adjacent open land in the level of sand percentage whereas non-significant difference was noticed between the treatments on the level of silt and clay percentage in the study. Finally, the results indicate that the eucalyptus tree species established in hedgerow system on clay soil in high rainfall area have no significant impact on soil physicochemical properties under short rotation period of the tree species. Int. J. Agril. Res. Innov. Tech. 10(2): 7-14, December 2020

SOIL ORGANIC MATTER AND SOIL PHYSICOCHEMICAL PROPERTIES ASSOCIATED WITH FOREST FIRES IN CENTRAL TAIWAN

Soil Science ◽  
2008 ◽  
Vol 173 (11) ◽  
pp. 768-778 ◽  
Author(s):  
Po-Neng Chiang ◽  
Shun-Yao Zhuang ◽  
Ya-Nan Wang ◽  
Wei Wang ◽  
Ming-Kuang Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Physicochemical Properties ◽  
Forest Fires ◽  
Soil Physicochemical Properties ◽  
Central Taiwan

scholarly journals Effect of Slope Aspect and Land Use Types on Selected Soil Physicochemical Properties in North Western Ethiopian Highlands

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Gebretsadik Melak Tamene ◽  
Hailu Kindie Adiss ◽  
Melese Yigzaw Alemu
Keyword(s):  
Land Use ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Bulk Density ◽  
Soil Ph ◽  
Soil Samples ◽  
Slope Aspect ◽  
Strong Positive Correlation ◽  
Soil Physicochemical Properties ◽  
Land Use Types

Recent research findings imply that the slope aspect has a great impact on soil genesis and soil microclimate. The microclimate has a significant effect on the soil geobiochemical processes taking place in the soil. However, the slope aspect impact on soil properties has not been yet studied well in Ethiopia, particularly in the northern highlands. This research was initiated to link selected soil physicochemical properties with slope aspects under different land use practices. The research was conducted in Gumara-Maksegnit watershed located at the upper Lake Tana basin, Ethiopia. Four slope aspects, eastward (Ew), northward (Nw), southward (Sw), and westward (Ww), and three land use types at each slope aspect, cropland (Cl), forest land (Fl), and grazing land (Gl), were considered. In total, 36 undisturbed soil samples for bulk density and 36 disturbed soil samples for selected soil properties were collected. Soil particle size (texture), bulk density, electrical conductivity (EC), soil pH, available phosphorus (av. P), available potassium (av. K), total nitrogen (TN), and soil organic carbon (SOC) were analyzed. The resulting analyses showed no significant variation (p<0.05) across both slope aspects and/or land use types for soil pH and EC, whereas the slope aspect showed a significant effect (p<0.05) on SOC, TN, av. K, and av. P. The highest significant (p<0.05) mean value of SOC was observed in the Ww (3.04%) followed by Nw (2.52%) but SOC was not significant (p<0.05) between Sw and Ew. While the highest av. K (1233.2 centimole/kilogram) and av. phosphorus (35.76 ppm) were observed in Nw slope aspect, the highest TN was in the Ww slope aspect (0.24%). The significant effect (p<0.05) of land uses can be summarized as Fl > Gl > Cl for SOC and TN. A strong positive correlation was observed between SOC and TN (R2 = 0.997) and av. K and av. P (R2 = 0.58) at p<0.05. Generally, the slope aspect, land use types, and their interaction had a significant effect on soil physicochemical properties.

scholarly journals Impact of Rapid and Intensive Land Use/Land Cover Change on Soil Properties in Arid Regions: A Case Study of Lanzhou New Area, China

2020 ◽  
Vol 12 (21) ◽  
pp. 9226
Author(s):  
Runxia Zhang ◽  
Xueyong Zhao ◽  
Chencheng Zhang ◽  
Jing Li
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Arid Regions ◽  
Land Use Land Cover ◽  
Soil Physicochemical Properties ◽  
Lulc Change ◽  
Native Grassland ◽  
Bare Land

Land use/land cover (LULC) change widely occurs during urbanization and can affect the functionality of soil ecosystems by altering soil physicochemical properties. However, few studies have evaluated the impacts of LULC change on soils in arid regions. This study investigates LULC change patterns during 2010–2017 in Lanzhou New Area, China based on remotely sensed data (Chinese GaoFen-1 and Advanced Land Observing Satellite). We identified five main land use change types and reference native grassland and farmland to determine soil properties at different depths. Principal component analysis and scatter matrix were employed to evaluate the effect of LULC change on soil properties. The results showed that LULC changes that occurred in Lanzhou New Area were characterized by the rapid growth of construction and bare land (increased by 13.06% and 5.97%, respectively) at the expense of farmland (decreased by 25.38%). The conversion of native grassland to artificial grassland and bare land, and farmland to bare land had similar effects on soil properties; i.e., a significant decline and a lower level in total nitrogen and soil organic carbon. The farmland to construction land transition deteriorated soil nutrients and increased soil compaction by both increasing bulk density (BD, mean = 1.63 g cm−3) and enhancing sand content by 69.21%. All land use change types increased BD and decreased soil water content and saturated soil water content when compared to the reference areas. These results indicate that changes in LULC have significant impacts on soil physicochemical properties. Thus, it is essential to optimize land planning and improve soil quality in arid ecosystems to ensure sustainable resource management and ecosystem conservation.

Sign in / Sign up

Export Citation Format

Share Document