Indira Gandhi Krishi Vishwavidyalaya
Indira Gandhi Krishi Vishwavidyalaya
Singh A.P.,Indira Gandhi Krishi Vishwavidyalaya
Indian Journal of Ecology | Year: 2014
A field study was conducted in a rice - wheat cropping system, rotated for three consecutive years with different tillage systems vis-à-vis weed control practices. In the fourth year of study, their effect was evaluated in terms of physico-chemical, biochemical and microbiological properties of rice rhizosphere soil. The results of the investigation revealed that different type of tillage operations exhibited their effects on physio-chemical properties, organic carbon status, enzymes' activity, basal respiration rate and microbial population of rhizosphere soil of rice. Soil reaction (pH) tend towards normality due to conventional-conventional tillage system, however, EC was least affected by different tillage systems. Maximum organic carbon was found In rhizosphere soil under conventional-conventional tillage system. It was found that soil enzymes' activity and basal soil respiration was maximum under conventional-conventional tillage system, whereas, minimum under zero-zero tillage system. The acid phosphatase activity was found more than alkaline phosphatase activity. The microbial population study showed that conventional-conventional tillage system promoted the growth of fungal and bacterial population whereas zero-zero tillage system did not show any promotional activity of the concerned microbial population. Data of above microbial population were also supported by microbial biomass carbon status of soil. The results of weed management study envisaged that the use of recommended herbicides (Butachlor as pre-emergence and fenoxaprop-p-ethyl + ethoxysulfuron as post-emergence) significantly affected the EC, organic carbon status, enzymes activity (acid, alkaline phosphatase and dehydrogenase), basal soil respiration rate, microbial population and microbial carbon status in rhizosphere soil of rice. The above parameters were found significantly lower in herbicide treated plots compared to hand weeded and weedy check plots In all the growth periods of crop.
Alagarasan G.,Indira Gandhi Krishi Vishwavidyalaya |
Aswathy K.S.,Tamilnadu Agricultural University
Frontiers in Plant Science | Year: 2017
Immunity, virulence, biofilm formation, and survival in the host environment are regulated by the versatile nature of density dependent microbial cell signaling, also called quorum sensing (QS). The QS molecules can associate with host plant tissues and, at times, cause a change in its gene expression at the downstream level through inter-kingdom cross talking. Progress in controlling QS through fungicide/bactericide in pathogenic microscopic organisms has lead to a rise of antibiotic resistance pathogens. Here, we review the application of selective quorum quenching (QQ) endophytes to control phytopathogens that are shared by most, if not all, terrestrial plant species as well as aquatic plants. Allowing the plants to posses endophytic colonies through biotization will be an additional and a sustainable encompassing methodology resulting in attenuated virulence rather than killing the pathogens. Furthermore, the introduced endophytes could serve as a potential biofertilizer and bioprotection agent, which in turn increases the PAMP- triggered immunity and hormonal systemic acquired resistance (SAR) in plants through SA-JA-ET signaling systems. This paper discusses major challenges imposed by QS and QQ application in biotechnology. © 2017 Alagarasan and Aswathy.
Sahu H.,Indira Gandhi Krishi Vishwavidyalaya |
Saxena R.R.,Indira Gandhi Krishi Vishwavidyalaya |
Verulkar S.B.,Indira Gandhi Krishi Vishwavidyalaya |
Pratibha Mohan V.,Indira Gandhi Krishi Vishwavidyalaya |
Rao R.K.,Indira Gandhi Krishi Vishwavidyalaya
Indian Journal of Ecology | Year: 2017
In this study characterization of hundred landraces/farmers varieties of rice (Safri) collected from different part of chhattishgarh was performed using DUS testing protocol. Characterization was done using forty six agro-morphological traits following Distinctiveness, Uniformity and Stability test (DUS) during kharif season of 2014 at the biodiversity park Indira Gandhi Krishi Vishwavidyalaya, Raipur. Among the investigated forty six qualitative and quantitative characters, 10 characters were quantitative and 36 were qualitative in nature. Leaf intensity of green colour, Leaf width of blade, time of heading, flag leaf attitude, 1000 grain weight, Grain length, Grain width, Decorticated Grain length and Width are the essential characters which are used for the grouping of variety according to the DUS guideline and recorded highest variation among accessions. All the accessions were distinct on the basis of thirty five characters. The present work is so much important in respect to the present scenario of agro-biodiversity of this region as well as identification, conservation and documentation of landraces variety for future crop improvement.
Uma,Indira Gandhi Krishi Vishwavidyalaya |
Chowdhury T.,Indira Gandhi Krishi Vishwavidyalaya |
Soni R.,Indira Gandhi Krishi Vishwavidyalaya |
Sharma G.L.,Indira Gandhi Krishi Vishwavidyalaya
Indian Journal of Ecology | Year: 2017
The investigation was carried out to evaluate the effective eco-friendly microflora for earty degradation of herbicide and enhancing chickpea productivity. Fifteen soil samples were collected from different plots of a long term herbicidal trail where different herbicides were applied in kharif and rabiseason continuously for last five years in a rice-chickpea cropping system. Three rhizobial, four phosphobacterial, two Azotobactor and two Azospirillum isolates were isolated and 11 crop beneficial herbicide tolerant microbial isolates were identified. Among different treatments dual inoculation of rhizobial isolate Rhizobium-Z and phospho-bacterial isolate PSB-4 was found best for rapid degradation of herbicide pendimethalin, followed by single inoculation of phosphor-bacterial isolate PSB-4. These native isolates had highest basal soil respiration, alkaline phosphatase activity and microbial population over control at 50 days after sowing. The combined application of Rhizobium-3 and PSB-4 also found supreme to increase the chickpea yield at highest level followed by isolate PSB-4 by mobilizing more nitrogen and phosphorus in crop rhizosphere.
Tewari V.K.,Indian Institute of Technology Kharagpur |
Shrivastava A.K.,Indira Gandhi Krishi Vishwavidyalaya
Advances in Intelligent Systems and Computing | Year: 2016
A finite element model of Universal Mounting Fixture (UMF) was developed in CATIA_V5. This model consisted of a number of beam elements and nodes connected to the tractor frame. For the simulation, fasteners between the ROPS and tractor axle housing were designed. The finite element model was developed parametrically to accommodate a range of tractors and ROPS sizes. The parametric design permits changes in the model dimensions without varying the number of nodes or elements. It was important to note that this research examined trends for various scenarios for one base-fixture finite element model. The final design of fixture was developed and tested in accordance with IS 11821 (Part 2): 1992 . With due consideration of part geometry, OCTREE Tetrahedron mesh was selected and parabolic displacement interpolation was used between the nodes and elements. After getting the satisfactory result of UMF, the fixture was fabricated and validated through static testing of ROPS. The sequences for the loadings were as follows: rear longitudinal, vertical crush, transverse, and second longitudinal. Each testing except vertical loading, were carried out until the fulfillment of energy criterion. The vertical loading test required maintaining of the load for a specific period of time. The axle housing and mounting fixture combinations must pass the static testing criteria as per standard for acceptability. The fixture design has been patented and being used in testing different types of tractor ROPS. © Springer International Publishing Switzerland 2016.
Kotasthane A.,Indira Gandhi Krishi Vishwavidyalaya |
Agrawal T.,Indira Gandhi Krishi Vishwavidyalaya |
Kushwah R.,Indira Gandhi Krishi Vishwavidyalaya |
Rahatkar O.V.,Indira Gandhi Krishi Vishwavidyalaya
European Journal of Plant Pathology | Year: 2014
In the current study we evaluated the production of potential growth-promoting metabolites (IAA, phosphate, siderophore) for 20 isolates of Trichoderma collected from different geographical locations of Chhattisgarh and assessed their growth response on cucumber, bottle gourd and bitter gourd. All the Trichoderma isolates were able to release inorganic phosphorus from tri-calcium phosphate and showed consistent ability to produce siderophores and indole-3-acetic acid (IAA). The production of these metabolites varied greatly within species. Using the same set of isolates we evaluated the production of potential cell wall degrading enzymes. Confrontation assays of Trichoderma isolates against two soilborne plant pathogens (Scelrotium rolfsii and Rhizoctonia solani) expressed varying degrees of antagonistic responses, in-vitro antagonism being more effective against R. solani than S. rolfsii. The production of metabolites in all the Trichoderma isolates did not correlate with enhanced growth on cucumber, bottle gourd and bitter gourd, and bio control efficacy. However, one of the Trichoderma viride isolate (T14) was identified as highest producer of inorganic phosphate, IAA and siderophore exhibited high antagonistic and plant growth promoting ability. A characteristic aromatic odour resembling coconut in T14 isolate was observed which we speculate is due to 6-Pentyl pyrone (one of the best studied secondary metabolites having both antifungal and plant growth-promoting activities). © 2014, Koninklijke Nederlandse Planteziektenkundige Vereniging.
Verma V.,Indira Gandhi Krishi Vishwavidyalaya |
Patel S.,Indira Gandhi Krishi Vishwavidyalaya
Emirates Journal of Food and Agriculture | Year: 2013
Finger millet also known as ragi in India is one of the important cereals occupies highest area under cultivation among the small millets. Finger millet is comparable to rice with regard to protein (6-8%) and fat (1-2%) and is superior to rice and wheat with respect to mineral and micronutrient contents. It is a major source of dietary carbohydrates for a large section of society. Additionally ragi has enormous health benefits and also a good source of valuable micro-nutrients along with the major food components. In order to develop the value added food products based on ragi, that can able to enrich the nutritional value and also beneficial for good health is the current need for the wellbeing of the society. Food is consumed in combinations. The synergy between foods with other is vital not for taste and delight of eating but also for their high nutritional quality and health benefits. The modern trend for development of new food products aspires for complementary foods in order to fulfill the widening gap of food availability and nutritional security. This paper attempts to discuss the few value added food products incorporating ragi and simultaneously attempts to enlist and document the methodology and techniques in the interest of scientist and common mass.
Kumar P.,Indira Gandhi Krishi Vishwavidyalaya |
Dhillon S.K.,Punjab Agricultural University |
Kaur J.,Punjab Agricultural University
Indian Journal of Ecology | Year: 2014
The present investigations were undertaken to find out association among the economically important characters in different moisture regimes. Under normal irrigation level, seed yield exhibited significant positive correlation with 100-seed weight, early vigour and photosynthetic capacity, however, its association with canopy temperature was significantly negative. The significant positive association of seed yield with 100 seed weight, leaf water potential, plant height and head diameter was observed in second water stress environment. In third water stress environment, seed yield had significant positive correlation with early vigour, canopy temperature, head diameter and 100-seed weight but a significant negative correlation with leaf area index and number of days to maturity. In fourth stress condition, seed yield was found to have significant positive association with head diameter, 100 seed weight and leaf water potential. This indicated a shift in correlations under changing water stress environments. The study revealed that while selecting for high seed yield under different water stress conditions, the selection criteria should be based on the changing correlations among different characters, under different stress environments.
Ghosh L.,Indira Gandhi Krishi Vishwavidyalaya |
Singh L.,Indira Gandhi Krishi Vishwavidyalaya
Tropical Ecology | Year: 2011
This study describes the variation in seed and seedling characters of Jatropha curcas L. Seeds of J. curcas were collected from 6 zones (geographical regions) within India and 4-6 provenances within each zone. Significant variation was found among zones and among different provenances within zones, for all traits of seed and seedlings of J. curcas. Among six zones, sub- humid to humid eastern, south eastern uplands, semi arid lava plateaus and central highlands showed maximum seed length, seed weight, oil content and plant height. All seed and seedling characters were lowest for humid western Himalayan zone. Among 32 provenances, Danikundi, Pendra road, Nainpur and Indore-1 provenances showed better seed and seedling characters. This study has implications for identifying potential seed sources of J. curcas for exploiting for higher oil content. © International Society for Tropical Ecology.
Urkurkar J.S.,Indira Gandhi Krishi Vishwavidyalaya |
Chitale S.,Indira Gandhi Krishi Vishwavidyalaya |
Tiwari A.,Indira Gandhi Krishi Vishwavidyalaya
Indian Journal of Agronomy | Year: 2010
Field experiments were conducted at Raipur in Inceptisols between 2003-04 and 2007-08 to compare organic, integrated and chemical fertilizer nutrient inputs pakages in scented rice (Oryza sativa L.) - potato (Solanum tuberosum L.) a high value cropping system. Seven different nutrient treatments, 5 of them having use of organic inputs and 1 each having integrated (50% through fertilizers and 50% through organic nutrients) and 100% through fertilizers were studied in RBD with 3 replications. Organic transition effect in which decline in yield from 1 to 3 years and again increase in yield was noticeable in rice under organic nutrient inputs packages. These treatments followed a steady increase and registered 20 to 50% more yield at the end of study compared to first year yield i.e. 2003-04. However, effect of different organic inputs packages on potato tuber yield was not stable over the years. Total productivity in terms of rice equivalent yield of the system (13.36 tonne/ha) and total net return (Rs 92,634/kg) was highest with chemical fertilizer treatment closely followed by integrated inputs use. 100% N (1/3 each from cowdung manure, neem cake and composed crop residue) appreciably increased the organic carbon (6.3 g/kg) over initial value (5.8 g/kg). However, availability of P and K did not show any perceptible change after completion of five cropping cycles under organic as well as integrated nutrient approaches.