Seasonal Change of the Soil Physical, Chemical and Biological Properties of the VGCG Slope

2012 ◽  
Vol 599 ◽  
pp. 32-35
Author(s):  
Zi Chao Zhao ◽  
Zhen Yao Xia ◽  
Ming Yi Li ◽  
Bin Wu ◽  
Wen Nian Xu
Keyword(s):  
Seasonal Change ◽  
Enzyme Activities ◽  
Chemical Properties ◽  
Biological Properties ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Physical Chemical ◽  
Different Seasons ◽  
One Year ◽  
Physical And Chemical

Taked an repaired completed slope - Vegetation-Growing Concrete Gunning (VGCG) slope for the experimental plot to measured indicators could evaluate the physical, chemical and biological properties.It showed that there were significantly difference in SBD, PH, SOM, AN. AP. AP and AK in different seasons, but no law. And there were significantly difference in soil enzyme activities except catalase in different seasons. Soil enzyme activities were highest in summer, lowest in winter except catalase. It showed that enzyme activitiy roses at first in the lower from spring to winter in one year. It proved that there were ruleless in seasonal change of the soil physical and chemical properties and there was a certain rule in seasonal change of the soil biological properties of the VGCG slope in one year.

scholarly journals Effects of Tree Species and Soil Enzyme Activities on Soil Nutrients in Dryland Plantations

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1153
Author(s):  
Yage Li ◽  
Chun Han ◽  
Shan Sun ◽  
Changming Zhao
Keyword(s):  
Soil Nutrients ◽  
Tree Species ◽  
Enzyme Activities ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Pinus Tabulaeformis ◽  
Soil Enzyme Activities ◽  
Caragana Korshinskii ◽  
Nitrogen Phosphorus

Long-term afforestation strongly changes the soil’s physicochemical and biological properties. However, the underlying mechanism of different tree species driving change in soil nutrients is still unclear in the long-term dryland plantations of the Loess Plateau, China. In this study, samples of surface soil (0–20 cm) and woody litter were collected from five plantations (≥50 years) of Caragana korshinskii, Armeniaca sibirica, Populus hopeiensis, Platycladus orientalis, and Pinus tabulaeformis and a natural grassland, and tested for the carbon, nitrogen, phosphorus, and potassium contents, as well as the soil sucrase (SC), urease (UE), and alkaline phosphorus (ALP) activities. We found that soil nutrients, enzyme activities, and the litter’s chemical properties obviously varied among five tree species. C. korshinskii significantly increased the soil’s TC, organic carbon (OC), total nitrogen (TN), available nitrogen (AN), and available potassium (AK) by 28.42%, 56.08%, 57.41%, 107.25%, and 10.29%, respectively, and also increased the soil’s available phosphorus (AP) by 18.56%; while P. orientalis significantly decreased soil TN (38.89%), TP (30.58%), AP (76.39%), TK (8.25%), and AK (8.33%), and also decreased soil OC (18.01%) and AN (1.09%), compared with those in grassland. The C. korshinskii plantation had higher quality litter and soil enzyme activities than the P. orientalis plantation. Moreover, 62.2% of the total variation in soil nutrients was explained by the litter’s chemical properties and soil enzyme activities, and the litter phosphorus (LP) and soil ALP had a more significant and positive impact on soil nutrients. Therefore, tree species, LP, and soil ALP were key factors driving soil nutrient succession in dryland plantations. The significantly positive nitrogen–phosphorus coupling relationship in the “litter–enzyme–soil” system revealed that the improving nitrogen level promoted the phosphorus cycle of the plantation ecosystem. Our results suggest that leguminous tree species are more suitable for dryland afforestation through the regulation of litter quality and soil enzyme activities.

scholarly journals An Emerging Chemical Fumigant: Two-Sided Effects of Dazomet on Soil Microbial Environment and Plant Response

2021 ◽  
Author(s):  
Ran Chen ◽  
Weitao Jiang ◽  
Shaozhuo Xu ◽  
Hai Fan ◽  
Xuesen Chen ◽  
...  
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Relative Abundance ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Physical And Chemical Properties ◽  
Soil Enzyme Activities ◽  
Soil Microbial ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Methyl bromide has been banned worldwide because it causes damage to the ozone layer and the environment. To find a substitute for methyl bromide, the relationships among fumigation, plant growth, and the microbial community in replant soil require further study. We performed pot and field experiments to investigate the effects of dazomet fumigation on soil properties and plant performance. Changes in soil microbial community structure and diversity were assessed using high-throughput sequencing, and plant physiological performance and soil physicochemical properties were also measured. Dazomet fumigation enhanced photosynthesis and promoted plant growth in replant soil; it altered soil physical and chemical properties and reduced soil enzyme activities, although these parameters gradually recovered over time. After dazomet fumigation, the dominant soil phyla changed, microbial diversity decreased significantly, the relative abundance of biocontrol bacteria such as Mortierella increased, and the relative abundance of pathogenic bacteria such as Fusarium decreased. Over the course of the experiment, the soil microbial flora changed dynamically, and soil enzyme activities and other physical and chemical properties also recovered to a certain extent. This result suggested that the effect of dazomet on soil microorganisms was temporary. However, fumigation also led to an increase in some resistant pathogens, such as Trichosporon, that affect soil function and health. Therefore, it is necessary to consider potential negative impacts of dazomet on the soil environment and to perform active environmental risk management in China.

scholarly journals التحليل الكيميائي للمياه المعباء في محافظة دهوك

2020 ◽  
Author(s):  
dadvan Hakeem Abdulrahman
Keyword(s):  
Chemical Properties ◽  
Bottled Water ◽  
Human Needs ◽  
Physical Chemical ◽  
Laboratory Results ◽  
Different Seasons ◽  
Basic Human Needs ◽  
Physical And Chemical ◽  
And Chemical Properties

Drinking water is considered one of the basic human needs that cannot be dispensed with for any reason and the water must have quality standards in terms of taste and color in addition to the physical, chemical and biological specifications. The bottled water industry has flourished in recent decades, and the demand for it has increased in most parts of the world and for various reasons, perhaps the most prominent of which is the quality of bottled water and the regularity of that quality in different seasons, while the water changes its quality due to the quality of the source ,in addition to the possibility of contamination during transportation or when it is poorly stored, which It leads to a change in some physical and chemical properties of water. On this basis, specific samples were selected for all companies that manufacture bottled water at Duhok Governorate area, and then all samples were examined, both chemical and physical, to obtain laboratory results for these samples.

scholarly journals PHYSICAL AND BIOLOGICAL PROPERTIES OF SOIL FERTILIZED WITH GREEN MANURE

1970 ◽  
Vol 63 ◽  
Author(s):  
Alina Dora Samuel ◽  
C. Domuţa
Keyword(s):  
Enzyme Activities ◽  
Green Manure ◽  
Agricultural Practices ◽  
Biological Properties ◽  
Soil Enzyme ◽  
Enzymatic Activities ◽  
Soil Enzyme Activities ◽  
Unfertilized Plot ◽  
Properties Of Soil

Agricultural practices that improve agricultural sustainability are needed particularly for brown luvic soil. Soil enzyme activities can provide information on how soil management is affecting the processes in soil such as decomposition and nutrient cycling. Soil enzyme activities (actual and potential dehydrogenase, catalase, acid and alkaline phosphatase) were determined in the 0–10, 10–20, and 20–30 cm layers of a brown luvic soil submitted to a complex fertilization experiment with different types of green manure. It was found that each activity decreased with increasing sampling depth. It should be emphasized that green-manuring of maize led to a significant increase in each of the five enzymatic activities determined. The enzymatic indicators of soil quality calculated from the values of enzymatic activities showed the order: lupinus + rape + oat > lupinus > vetch + oat + ryegrass > lupinus + oat + vetch > unfertilized plot. This order means that by determination of enzymatic activities valuable information can be obtained regarding fertility status of soils. There were significant correlations of soil enzyme activities with physical properties.

scholarly journals التحليل الكيميائي للمياه المعباء في محافظة دهوك

2020 ◽  
Author(s):  
dadvan Hakeem Abdulrahman
Keyword(s):  
Chemical Properties ◽  
Bottled Water ◽  
Human Needs ◽  
Physical Chemical ◽  
Laboratory Results ◽  
Different Seasons ◽  
Basic Human Needs ◽  
Physical And Chemical ◽  
And Chemical Properties

Drinking water is considered one of the basic human needs that cannot be dispensed with for any reason and the water must have quality standards in terms of taste and color in addition to the physical, chemical and biological specifications. The bottled water industry has flourished in recent decades, and the demand for it has increased in most parts of the world and for various reasons, perhaps the most prominent of which is the quality of bottled water and the regularity of that quality in different seasons, while the water changes its quality due to the quality of the source ,in addition to the possibility of contamination during transportation or when it is poorly stored, which It leads to a change in some physical and chemical properties of water. On this basis, specific samples were selected for all companies that manufacture bottled water at Duhok Governorate area, and then all samples were examined, both chemical and physical, to obtain laboratory results for these samples.

scholarly journals Silicon Application Modulates the Growth, Rhizosphere Soil Characteristics, and Bacterial Community Structure in Sugarcane

2021 ◽  
Vol 12 ◽  
Author(s):  
Quanqing Deng ◽  
Taobing Yu ◽  
Zhen Zeng ◽  
Umair Ashraf ◽  
Qihan Shi ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Enzyme Activities ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Community Diversity ◽  
Soil Enzyme Activities ◽  
And Chemical Properties

Silicon (Si) deficiency, caused by acidic soil and rainy climate, is a major constraint for sugarcane production in southern China. Si application generally improves sugarcane growth; however, there are few studies on the relationships between enhanced plant growth, changes in rhizosphere soil, and bacterial communities. A field experiment was conducted to measure sugarcane agronomic traits, plant nutrient contents, rhizosphere soil enzyme activities and chemical properties, and the rhizosphere bacterial community diversity and structure of three predominant sugarcane varieties under two Si treatments, i.e., 0 and 200 kg of silicon dioxide (SiO2) ha−1 regarded as Si0 and Si200, respectively. Results showed that Si application substantially improved the sugarcane stalk fresh weight and Si, phosphorus (P), and potassium (K) contents comparing to Si0, and had an obvious impact on rhizosphere soil pH, available Si (ASi), available P (AP), available K (AK), total phosphorus (TP), and the activity of acid phosphatase. Furthermore, the relative abundances of Proteobacteria showed a remarkable increase in Si200, which may be the dominant group in sugarcane growth under Si application. Interestingly, the AP was noticed as a major factor that caused bacterial community structure differences between the two Si treatments according to canonical correspondence analysis (CCA). In addition, the association network analysis indicated that Si application enriched the rhizosphere bacterial network, which could be beneficial to sugarcane growth. Overall, appropriate Si application, i.e., 200 kg SiO2 ha−1 promoted sugarcane growth, changed rhizosphere soil enzyme activities and chemical properties, and bacterial community structures.

Sign in / Sign up

Export Citation Format

Share Document