Dass A.,Indian Agricultural Research Institute |
Chandra S.,Gbpant University Of Agriculture And Technology |
Uphoff N.,Cornell University |
Choudhary A.K.,Indian Agricultural Research Institute |
And 2 more authors.
Paddy and Water Environment | Year: 2017
Although the System of Rice Intensification (SRI) has been reported to produce higher paddy (Oryza sativa L.) yields with better-quality grains, little research has addressed the latter claim. This study investigated the interactive effects of rice cultivation methods with different irrigation schedules and plant density on the uptake and concentration of sulfur (S), zinc (Zn), iron (Fe), manganese (Mn) and copper (Cu) in the grain and straw of two rice cultivars during two rainy seasons in the northern plains of India. As the two seasons differed in amounts of rainfall, there were impacts of soil moisture differences on nutrient uptake. Plots with SRI cultivation methods enhanced the grain uptake and concentrations of S, Zn, Fe, Mn and Cu by 36, 32, 28, 32 and 63%, respectively, compared to conventional transplanting (CT). Under SRI management, the highest concentrations of S, Zn and Cu in the grain and straw occurred with irrigation intervals scheduled at 3 days after disappearance of ponded water (DADPW; 3D), whereas Fe and Mn concentrations in the grain and straw were higher with irrigation at 1 DADPW (1D) compared with plots under 3D or 5 DADPW (5D). The higher nutrient uptakes were also manifested in higher grain yield in 1D and 3D plots (by 9 and 6%, respectively) compared with 5D. Wider spacing (25 × 25 cm) compared with closer spacing (20 × 20 cm) significantly increased yield and the uptake and concentrations of all the said nutrients in the grains. When comparing the performance of two cultivars, the total uptakes of Zn, Fe, Mn and Cu in both grain and straw were significantly more in Hybrid 6444 than the improved variety Pant Dhan 4. Overall, SRI crop management compared to CT practices led to more biological fortification of rice grains with respect to S and the four micronutrients studied, giving a concomitant yield advantage of about 17% on average in this region. © 2017 The International Society of Paddy and Water Environment Engineering and Springer Japan
Bisht A.,Gbpant University Of Agriculture And Technology |
Singh U.P.,Gbpant University Of Agriculture And Technology |
Pandey N.N.,Coldwater Fisheries Research
Journal of Environmental Biology | Year: 2014
The bacterial infection is an important economic and limiting factor in intensive fish production. The present study focuses on investigation of the bacterial population associated with farmed common carp fingerlings, its environment and limnological quality of pond, during winter and summer season. It was found that the bacterial count in the pond sediment (6.40 cfu × 104) was about 10 times higher in comparison of pond water (6.93 cfu × 103). Further, the intestinal bacterial count was about 100 times higher (6.67 cfu × 105) during winter and 1000 times higher (2.33 cfu × 106) during summer season in comparison to the surfacial skin of fish during winter and summer (3.39 and 8.87 cfu × 103), respectively. The isolated bacteria were both Gram negative and Gram positive, mostly aerobic rods. Furthermore, the temperature showed a significant relation with the bacterial counts of pond water. In the summer season, higher bacterial counts (8.72 cfu × 103) were recorded as compared to winter (5.13 cfu × 103). The dominant bacteria isolated from the sample of pond water, pond sediment and fish were identified as Aeromonas hydrophila, Pseudomonas fluorescens, Pseudomonas sp., Flavobacter sp., Bacillus sp., Micrococcus sp., Corynebacterium sp. Moreover, the bacterial density was dependent on C:N values, and the optimum range of C: N ratio was found between 16-23, for the carp culture ponds. Among the isolated bacterial flora, the presence of strains which were well known for their probiotic properties suggested an autochthonous source for use in aquaculture. Further, analysis of various physico-chemical parameters of pond water revealed that they were within the suitable range for the freshwater fish culture throughout farming phase. © Triveni Enterprises, Lucknow (India).
Singh N.,Mahatma Jyotiba Phule Rohilkhand University |
Srivastava A.,University of the Humanities |
Srivastava P.C.,Gbpant University Of Agriculture And Technology |
Srivastava N.,Mahatma Jyotiba Phule Rohilkhand University
Fresenius Environmental Bulletin | Year: 2011
The kinetics of adsorption and desorption of chlorpyrifos in soils of Himalayan tarai (mollisols) were studied using the miscible displacement technique under the laboratory conditions. The adsorption data of chlorpyrifos conformed to the first order kinetics and the computed values of adsorption rate constant (kads.) increased with depth and had a significant negative correlation with soil E.C.. The desorption data of chlorpyrifos also fitted well to two phase first order kinetics. However, no soil property individually showed any significant simple correlation with the desorption rate constant of chlorpyrifos (k1 des.). Adsorption rate constant (k ads) could be successfully predicted on the basis of soil sand; clay; organic C; and free iron oxide contents contents and soil B.C.. The faster desorption rate constant (k1 des) of chlorpyrifos could be predicted on the basis of soil sand; clay; and organic C contents and soil pH and E.C. while the slower desorption rate constant (k2 des.) could be estimated using sand; organic C; and free iron oxide contents and soil pH and E.C. © by PSP.
Chandra M.,Graphic Era University |
Prakash O.,University of the Humanities |
Bachheti R.K.,Graphic Era University |
Kumar M.,Gbpant University Of Agriculture And Technology |
Pant A.K.,University of the Humanities
Journal of Essential Oil-Bearing Plants | Year: 2016
Abstracts: The essential oil composition of Thymus linearis collected from two different locations (Harinagar; Nainital (TLHEO) & and Dhanachuli Nainital (TLEOD)) were analyzed by combination of GC and GC-MS. Total nine major constituents contributing to 93.6 % were identified in TLHEO and 89.3 % in TLDEO samples. Germacrene-D (65.1 %) and γ-terpinene (19.4 %) were identified as major constituents in TLHEO while thymol (66.8 %) and p-cymene (9.8 %) were identified in TLDEO. The oils and extracts were evaluated for DPPH radical scavenging ability, chelation of Fe2+, and Fe3+reducing power activities. The oils and extracts both showed good to moderate antioxidant activity in a dose dependent manner. Both oils and extracts also exhibited significant pharmacological activities (antipyretic, analgesic, and anti-inflammatory activities) compared to the standards (paracetamol, indomethacin and ibuprofen) tested on Swiss albino mice. Total phenolic assay of the aqueous ethanolic extracts determined by Folin-Ciocalteu method revealed total phenol (5.15 mg /100 mg), flavonols (0.26 mg /100 mg) and orthodihydroxy phenols (0.4 mg/100 mg) in Harinagar collection and (4.65 mg/ 100 mg), (0.52 mg/100mg) and (0.18 mg/100 mg) in Dhanachuli collection respectively. © 2016 Har Krishan Bhalla & Sons.
Kumar R.,Gbpant University Of Agriculture And Technology |
Tiwari S.N.,Gbpant University Of Agriculture And Technology
Pestology | Year: 2011
The fumigant toxicity of some plant oils was studied against Sitophilus oryzae, Rhizoprtha dominica and Tribolium castaneum. The plant oils of Trigonella foenumgraecum, Coleus aromaticus, Delbergia sisso, Asparagus racemosus, Lactuca sativa, Nigella sativa, Matricaria chamonilla, Withania somnifera, Styrax tonkinesis, Commifera mukul, Amomum subulatum, Dhatura metel, Nardostachys jatamansi, Sesamum indicum, Celastrus paniculatus, Bacopa monnieri, Psorelia corylifolia, Vitax nergundi at .02 and 0.4% (v/w) was found highly effective against R. dominica, Delbergia sisso, Lactuca sativa, Styrax tonkinesis, Sesamum indicum and Bacopa monnieri at 0.2 and 0.4% were found highly effective against T. castaneum in stored wheat.
Gondwal M.,Gbpant University Of Agriculture And Technology |
Prakash O.,Gbpant University Of Agriculture And Technology |
Vivekanand,Gbpant University Of Agriculture And Technology |
Pant A.K.,Gbpant University Of Agriculture And Technology |
And 2 more authors.
Journal of Essential Oil Research | Year: 2012
The essential oils of the leaves and flowers of Skimmia anquetilia N.P.Taylor & Airy Shaw (family: Rutaceae) were examined by the combination of gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The analysis of the oils from leaves and flowers revealed the presence of b-phellandrene (1.8%, 18.4%), geijerene (2.0%, 15.0%), germacrene B (11.6%, 2.0%), linalyl acetate (7.3%, 11.2%), linalool (9.5%, 9.4%), a-terpineol (5.6%, 4.4%) and pregeijerene (0.2%, 5.6%) as major constituents. The antioxidant activity of the leaf and flower oils was studied and compared by different methods including their effect on reducing power, chelating properties of Fe+2 and in vitro 2'2'-diphenylpicrylhadrazyl (DPPH) radical-scavenging activity. The total phenolic contents in the water extracts of leaf and flower were estimated and compared. © 2012 Taylor & Francis.
Gupta M.,Gbpant University Of Agriculture And Technology |
Upadhyay A.K.,Gbpant University Of Agriculture And Technology |
Pandey N.N.,Coldwater Fisheries Research ICAR
Journal of Environmental Biology | Year: 2013
An attempt was made to distinguish the possible organoleptic differences between the pond reared and wild fish species of reservoirs and correlate these with the physicochemical characteristics of water bodies. The texture was found to firmer in wild varieties of fishes than pond reared fish, with best in Catla catla followed by Labeo rohita and Cirrhinus mrigala. All the cultured fishes had lighter colour than wild fish species which were darker in appearance. Comparatively, higher dissolved oxygen and transparency levels with low temperature and alkalinity levels were found in reservoirs. Hydrobiologically, the efficient ecosystem of reservoir was responsible for stronger texture and dark colouration in wild fish species. The fishes from reservoir exhibit tendency to lead active and agile life, comparatively the fishes from ponds are docile. Reservoirs have the potential of enhanced quality fish production. © Triveni Enterprises, Lucknow (India).
Jha A.,Gbpant University Of Agriculture And Technology |
Nain A.S.,Gbpant University Of Agriculture And Technology |
Ranjan R.,Gbpant University Of Agriculture And Technology
Vegetos | Year: 2013
A field study has been carried out in Pantnagar; district U.S. Nagar of Uttarakhand State for wheat acreage estimation, during Rabi season of the year 2010-2011. Two types of data viz. satellite data of Haldwani region dated 22nd March 2010 and ground truth data have been used for the study. ENVI- 4.8 (Environment for Visualizing Images-4.8) software was used for image pre processing and analysis of the data. Wheat crop at the maximum vegetative stage was used to capture the crop spectral characteristics. Supervised classification was used to identify the wheat crop in Pantnagar. Ground truth data combined with visual interpretation obtained from LANDSAT image dated 22nd March 2010 were used as training sets for supervised classification. The training pixels were selected from different fields. The total numbers of five classes were identified for which separate ROIs (Region of Interest) were generated in order to train the image processing software. The accuracy of the classification was determined by comparing the test set with the classification results to generate producers, user's and the overall accuracies. The overall accuracy obtained was 100%. Post classification statistics was generated to find out pixels belonging to different categories. The acreage of all the classes was computed by multiplying the total number of pixels in a category with the area of single pixel. The size of each pixel in LANDSAT image is 30m and hence the area covered by each pixel is 30mx30m (900m2). The total number of pixels obtained was 16,495. Therefore, total area under study was found to be 1484.55 ha.
Padalia D.,Gbpant University Of Agriculture And Technology |
Johri U.C.,Gbpant University Of Agriculture And Technology |
Zaidi M.G.H.,Gbpant University Of Agriculture And Technology
Materials Chemistry and Physics | Year: 2016
The current work presents the synthesis and properties of cerium doped magnetite (Fe3O4) nanoparticles synthesized by standard chemical co-precipitation method using NH4OH as co-precipitating agent. The effects of cerium ion substitution on structural and magnetic properties of magnetite (Fe3O4) nanoparticles were reported. These materials were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and vibrating sample magnetometer (VSM). The cerium content has a significant influence on structural and magnetic properties. The X-ray diffraction study confirmed the formation of single-phase magnetite with space group Fd3m and crystallite size ranging from 39 to 58 nm. The addition of cerium resulted in a reduction of crystallite size and an increase of cell parameters. FTIR measurements confirmed the formation of different samples and suggested that the reduction of Fe+3 to Fe+2 preferred on a site adjacent to Ce+4. Magnetic measurements revealed that the saturation magnetization (Ms) and remanence (Mr) decreased while the coercivity (HC) and squareness (Mr/MS) increased with increasing cerium content. © 2015 Elsevier B.V. All rights reserved.
Yadav R.,Gbpant University Of Agriculture And Technology |
Malik N.,Gbpant University Of Agriculture And Technology
Indian Journal of Agronomy | Year: 2010
To find out the efficacy of different organic materials as source of nutrients to barnyard millet (Echinochloa frumentacea), an experiment was laid out with 12 treatments consisting of different organic manures in a randomized block design with 3 replications during kharif 2005-2008 at Ranichauri. The results indicated that various organic nutrition treatments have significantly lower productivity of barnyard millet than recommended dose of fertilizers (RDF i.e. 40-20-20 kg N-P-K/ha) in the initial 2 years (2005 and 2006). However, from third year onwards, organic nutrition treatments of vermicompost (VC) + wild apricot-cake, WAC (50% N from each source) with and without Azotobacter produced statistically at par yield as that of RDF. Among the organic nutrition treatments tried, VC + WAC (50% N from each source) + Azotobacter on an average produced statistically similar yields (1.78 tonne/ha) as that of RDF (1.92 tonne/ha). The net returns and benefit to cost ratio were highest with RDF followed by VC + WAC (50% N from each source) + Azotobacter. Consequently that locally available WAC with VC can be a cheaper alternative to the inorganic fertilizers that can be used without significant losses in yields of barnyard millet.