scholarly journals Change in physico-chemical properties of soil and nutrients in Desmodium triflorum in case of seasonal variation in Ratnanagar-11, Jirauna, Chitwan, Nepal

2017 ◽  
Vol 3 (11) ◽  
pp. 285
Author(s):  
Niroj Paudel ◽  
Lila Pati Paudel ◽  
Prakash Deep Rai ◽  
Bishnu Dev Das
Keyword(s):  
Seasonal Variation ◽  
Rainy Season ◽  
Chemical Change ◽  
Winter Season ◽  
Chemical Properties ◽  
Low Ph ◽  
Physico Chemical ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Properties Of Soil

<p class="abstract"><strong>Background:</strong> Physico-chemical change is described in case of seasonal variation. The plant became grazed in different seasonings; nitrogen, phosphorus and potassium are estimated. The aim of paper is the nutrient uptake of <em>Desmodium triflorum due</em> to the change in season.</p><p class="abstract"><strong>Methods:</strong> The sample is collected as four month interval period the grass is tolerate as low pH<strong>. </strong>N-1.67–2.04%, P- 0.34–0.61% and K-1.46–4.15%.  </p><p class="abstract"><strong>Results:</strong> Soil had lowest concentrations of nitrogen (0.096%), phosphorus (0.004%), and potassium (0.027%) in the rainy season. The highest concentration of nitrogen (0.22%) occurred in summer season, phosphorus (0.005%) in winter and summer seasons, and potassium (0.073%) in the winter season. The carbon/nitrogen (C/N) ratio was highest (15.22:1) in summer and lowest (13.96:1) in the rainy season.</p><p><strong>Conclusions:</strong> Present study will be valuable in evaluation and management of the middle land pastures in Nepal.</p>

scholarly journals Physico-chemical properties of Seepage stream at Shripur area, eastern Nepal

2013 ◽  
Vol 2 ◽  
pp. 46-54
Author(s):  
Damodar Thapa Chhetry ◽  
Joydeb Pal
Keyword(s):  
Water Temperature ◽  
Air Temperature ◽  
Rainy Season ◽  
Winter Season ◽  
Chemical Properties ◽  
Summer Season ◽  
Total Alkalinity ◽  
Total Hardness ◽  
First Year ◽  
Physico Chemical

Physico-chemical parameters of the Seepage stream of Shripur area were studied for two years from July, 2002 to June, 2004, once in every month at regular intervals. The maximum air temperature was recorded in rainy season during first year (July, 2002 to June, 2003) and second year study period (July, 2003 to June, 2004). Water temperature was maximum in summer and lowest in winter season. Transparency, total alkalinity, total hardness, chloride were maximum in winter season. Free CO2 and BOD was maximum in summer season. The minimum transparency, total alkalinity, total hardness and chloride were recorded in rainy season. DO and pH were maximum in winter and minimum in summer season during the whole study period. Air temperature, water temperature, free CO2, BOD showed positive and significant correlation with each other. Transparency showed positive and significant correlation with pH, DO, total alkalinity, total hardness and chloride. pH showed positive and significant correlation with DO and chloride. Similarly, DO, total alkalinity, total hardness and chloride showed positive and significant correlation with each other. DOI: http://dx.doi.org/10.3126/njbs.v2i0.7489 Nepalese Journal of Biosciences 2 : 46-54 (2012)

scholarly journals Phosphatase activities of spruce stand soils after serpentinite fertilisation in combination with nitrogen, phosphorus and potassium fertilisers

2015 ◽  
Vol 57 (2) ◽  
pp. 82-89 ◽  
Author(s):  
Ewa Błońska ◽  
Kazimierz Januszek ◽  
Tomasz Wanic ◽  
Stanisław Małek
Keyword(s):  
Physicochemical Properties ◽  
Positive Impact ◽  
Chemical Properties ◽  
Molar Ratio ◽  
Mineral Horizon ◽  
Spruce Stands ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Forest District ◽  
Properties Of Soil

Abstract The aim of this study was to assess the condition of soil after serpentine fertilisation by determining the activity of phosphatase and some physicochemical properties of soil. The study was conducted in southern Poland in the Wisła Forest District (49°8’12.92N 18°58’56.36E). The following variants: C - control - no fertiliser; S - ground serpentinite; SN - serpentinite + nitrogen; SP - ground serpentinite + P; SNP - ground serpentinite + NP; SNPK - ground serpentinite + NP (as above) + K. Fertilisation of serpentinite stimulates the activity of phosphatase in soil under spruce stands. The positive impact is reflected in the organic horizon. Less activity was noted in the humus-mineral horizon (AE) in all the fertiliser combinations three years after the fertilisation. Fertilisation of serpentinite improves the chemical properties - pH was increased, reduction of molar ratio of exchangeable calcium to magnesium form was noted.

scholarly journals Bacteriological and physico-chemical properties of the Gulshan Lake, Dhaka

1970 ◽  
Vol 40 (2) ◽  
pp. 105-111 ◽  
Author(s):  
Mihir Lal Saha ◽  
Tahmina Bari ◽  
Mahbubar Rahman Khan ◽  
Sirajul Hoque
Keyword(s):  
Seasonal Variation ◽  
Pseudomonas Syringae ◽  
Water Samples ◽  
Rainy Season ◽  
Heterotrophic Bacteria ◽  
Bacterial Load ◽  
Chemical Properties ◽  
Enteric Bacteria ◽  
Physico Chemical ◽  
Chemical Contents

Seasonal variation on bacterial load irrespective of heterotrophic and enteric bacteria was noticed in Gulshan lack of Dhaka Metropolitan city. The lowest number (1.56×106 cfu/100 ml) in the summer and the highest (19.03×106 cfu/100 ml) were recorded during winter. Among the isolated bacteria 32 were studied in details and provisionally identified as Bacillus cereus (1), B. sphaericus (1), B. subtilis (1), B. brevis (2), B. pasteuri (1), B. stearothermophilus (1), B. azotoformans (1), B. pantothenticus (1), B. licheniformis (1), B. circulans (1), B. insolitus (1), Planococcus citrius (1), Micrococcus sedentarius (1), Pseudomonas. syringae (4), P. aeruginosa (1), P. cichorii (1), Escherichia (2), Klebsiella (1), Aeromonas (1), Proteus (1), Enterobacter (1), Salmonella (2), Yersinia (1), Shigella (1), Hafnia (1), and Alcaligens (1). The temperature and pH of the water samples varied between 24.3 and 29.2º C and 6.54 and 7.12, respectively. Chemical contents (mg/l) like NH4 +-N, NO3 --N and phosphorus ranged 3.06 (Winter) to 14.86 (Summer), 0.32 (in Rainy season) to 13.02 (Summer) and 0.81 (Rainy season) to 1.86 (Summer), respectively. The enteric bacterial load (0.03 × 105 cfu/100 ml in Rainy season to 21.2 × 105 cfu/100 ml in Winter) and the presence of Escherichia, Aeromonas, Enterobacter, Pseudonomas in the samples indicated significant level of microbial pollution of the lake. Key words: Aerobic-heterotrophic; Bacteria; Enteric bacteria; Chemical factorsDOI: http://dx.doi.org/10.3329/bjb.v40i2.9753 Bangladesh J. Bot. 40(2): 105-111, 2011 (December)  

scholarly journals Effect of zoogenic litter on soil’s chemical properties in forest biogeocoenoses of steppe Prydniprovia

2018 ◽  
Vol 29 (2) ◽  
Author(s):  
M. V. Shulman ◽  
O. Y. Pakhomov
Keyword(s):  
Organic Matter ◽  
Ph Value ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Steppe Zone ◽  
Soil Horizons ◽  
Phosphorus And Potassium ◽  
Positive Effect ◽  
Nitrogen Phosphorus ◽  
Properties Of Soil

The aspects of the process of decomposition and recycling of zoogenic litter (dead animals of different classes) were first ascertained for the steppe Prydniprovia. Influence of destruction of necrotic organic matter on soil properties (pH, NPK-complex) in forest ecosystems in the steppe zone of Ukraine was estimated. Decomposition and recycling processes of dead animals (chickens, rats) on the experimental plots in biogeocoenoses with artificial oak plantations, sampling soil under dead bodies after the active stages of decomposition with different soil horizons at the same time with control samples, its chemical analysis allowed to determine the effect of degradation necrotic organic matter on the pH value and the content of some chemical elements (N, P, K) in the soil studied ecosystems. In this article the results of investigation of the effect of zoogenic litter on some chemical properties of soil in forest biogeocoenoses of steppe Prydniprovia are presented. The effect of chickens and rats corpses’ decomposition on the pH of soil, nitrogen, phosphorus and potassium indexes in the soil is analyzed. The influence of the expansion of animal carcasses on soil chemical properties in different soil horizons compared with control values (without the presence of animal carcasses) is identified. It was found that under the effect of decomposition of animals’ corpses the pH of the soil increases. Under the corpses of chickens pH increases by 6,4–16,7 %, and rats – 2,2–14,2 % compared to control values. The content of nitrogen in the soil under the corpses of chickens increases by 9,5–42,2 %, and under the corpses of rats – to 25,5–25,7 %. Phosphorus content under the corpses of chickens increases by 28,4–107,7 % of rats – to 57,5–75,7 %. The content of potassium in the soil under the corpses of chickens increased by 3,63 % to 69,8 %, and the corpses of rats – by 6,8–23,0 %. Consequently zoogenic litter is an important factor in the accumulation of NPK-complex in the soil. Thus process of animal corpse decomposition has positive effect for chemical properties of forest soil and biogeocoenoses generally.

scholarly journals Effects of serpentinite fertilizer on the chemical properties and enzyme activity of young spruce soils

2016 ◽  
Vol 30 (4) ◽  
pp. 401-414 ◽  
Author(s):  
Ewa Błońska ◽  
Kazimierz Januszek ◽  
Stanisław Małek ◽  
Tomasz Wanic
Keyword(s):  
Enzyme Activity ◽  
Chemical Properties ◽  
Molar Ratio ◽  
Tree Roots ◽  
Forest Zone ◽  
Negative Effect ◽  
Phosphorus And Potassium ◽  
One Year ◽  
Nitrogen Phosphorus ◽  
Experimental Plots

AbstractThe experimental plots used in the study were located in the middle forest zone (elevation: 900-950 m a.s.l.) on two nappes of the flysch Carpathians in southern Poland. The aim of this study was to assess the effects of serpentinite in combination with nitrogen, phosphorus, and potassium fertilizers on selected chemical properties of the soil and activity of dehydrogenase and urease in the studied soils. All fertilizer treatments significantly enriched the tested soils in magnesium. The use of serpentinite as a fertilizer reduced the molar ratio of exchangeable calcium to magnesium, which facilitated the uptake of magnesium by tree roots due to competition between calcium and magnesium. After one year of fertilization on the Wisła experimental plot, the pH of the Ofh horizon increased, while the pH of the mineral horizons significantly decreased. Enrichment of serpentinite with nitrogen, phosphorus, and potassium fertilizers stimulated the dehydrogenase activity in the studied organic horizon. The lack of a negative effect of the serpentinite fertilizer on enzyme activity in the spruce stand soil showed that the concentrations of the heavy metals added to the soil were not high enough to be toxic and indicated the feasibility of using this fertilizer in forestry.

scholarly journals Phytotoxic effects of invasive Ageratina adenophora on two native subtropical shrubs in Nepal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tej Bahadur Darji ◽  
Barsha Adhikari ◽  
Seeta Pathak ◽  
Shristi Neupane ◽  
Lal B. Thapa ◽  
...  
Keyword(s):  
Low Ph ◽  
Potential Mechanism ◽  
Phytotoxic Effects ◽  
Seedling Length ◽  
Ageratina Adenophora ◽  
Ir Analysis ◽  
Allelopathic Interference ◽  
Phosphorus And Potassium ◽  
Native Shrubs ◽  
Nitrogen Phosphorus

AbstractThe response of native plants to allelopathic interference of invasive species may differ from species to species. In this study, the phytotoxic effects of Ageratina adenophora were tested on two native shrubs (Osbeckia stellata and Elsholtzia blanda) of Nepal. Both the shrubs were grown in pots under treatments of A. adenophora fresh leaves and root leachates, and litter. Then, the seedling length and biomass were compared among the treatments. The results show that A. adenophora litter has stimulatory effects but the leachates from fresh leaves and root are phytotoxic to the growth and development of native shrubs. Infrared Spectroscopy (IR) analysis confirmed the presence of O–H (Hydroxyl), N–H (Amines), C≡C (Alkynes), and C–H stretching (Aromatic) or C–O–C stretching (Ethers) in the leachates representing harmful allelochemicals. The invaded soil by A. adenophora had low pH and a high amount of organic matter, total nitrogen, phosphorus, and potassium than the uninvaded soil. The results indicate that the native O. stellata and E. blanda are harmed by A. adenophora in nature by leaching of allelochemicals and probably by reducing the soil pH. Overall, this study has provided valuable insights regarding the effects of A. adenophora invasion on native shrubs and revealing the potential mechanism of its invasiveness.

scholarly journals Pollution Scenario due to Discharge of Effluent from Agrochemicals and Pesticides Manufacturing Industries of Dombivali Industrial Belt of Mumbai, India

2013 ◽  
Vol 22 ◽  
pp. 8-15
Author(s):  
P.U. Singare ◽  
S.S. Dhabarde
Keyword(s):  
Heavy Metals ◽  
Ph Value ◽  
Winter Season ◽  
Chemical Properties ◽  
Total Solid ◽  
Average Concentration ◽  
Summer Season ◽  
Manufacturing Industries ◽  
Toxic Heavy Metals ◽  
Physico Chemical

The paper deals with monitoring of pollution arising due to agrochemicals and pesticides manufacturing industries located along the Dombivali industrial belt of Mumbai, India. The study was carried for the period of one year from June, 2012 to May, 2013 to study the level of toxic heavy metals and the physico-chemical properties of waste water effluents discharged from the above industries. The average concentration of Cu, Ni, Cr, Pb and Zn was found to be maximum of 29.86, 0.90, 1.16 and 1.19 ppm respectively in summer season, while average Fe concentration was maximum of 51.10 ppm in winter season. The average pH value of the effluent was found to be maximum of 12.95 in summer season, while average conductivity value was maximum of 21085 µmhos/cm in rainy season. The majority of physco-chemical parameters like alkalinity, hardness, salinity, chloride, cyanide, phosphate, total solid, BOD and COD content were found to be maximum in summer season having the average values of 1918, 186, 4, 11.20, 0.07, 81, 6391, 685 and 2556 ppm respectively. The average DO content was found to be low of 4.5 ppm in winter season. It was observed that the concentration level of majority of the toxic heavy metals and physico-chemical properties were above the tolerable limit set for inland surface water. The results of present study indicates that the existing situation if mishandled can cause irreparable ecological harm in the long term well masked by short term economic prosperity due to extensive industrial growth

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