Phosphorus on soil enzymes activity

Soil samples collected from two termite mound soils in Anna University campus, Chennai, Tamil Nadu were characterized for the various parameters such as pH, Electrical Conductivity (EC), Total organic carbon (TOC), Nitrogen (N), Phosphorus(P) and Potassium (K)and microbial activity. The dehydrogenase enzyme activity was found to be 25 and 23mg TriphenylFormosan (TPH) mg/g/h respectively for the two termite mound soils.

8p kethamoi7 26-08-2020 17 2   Download

Field experiment was conducted in the college form college of agriculture Rajendranagar during the 2015 kharif season to investigate the effect of nano-fertilizer on mineral status of groundnut crop grown under rainfed conditions.

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Field experiment was conducted during kharif, 2016 on sandy loam soil to study the effect of phosphorus levels, biofertilizers (PSB) and organic manures (vermicompost) on acid and alkaline phosphatase enzyme activity and yield of green gram. The experiment was laid out in randomized block design with three replications having 12 treatment combinations viz. 3 levels of phosphorus (0, 75 and 100 % RDP) and its integration with PSB (2 kg ha-1 ) and vermicompost (5 t ha-1 ). Application of inorganic P alone decreased phosphotase enzyme activity from 0 to 100 % RDP level.

4p trinhthamhodang4 22-03-2020 23 1   Download

Magnesium (Mg) is the structural component of chlorophyll and polysaccharides and also an activator of several enzymes. Magnesium plays an important role in photosynthesis. An attempt was made in the present investigation on utilizing this property for increasing rate of photosynthesis of maize plant and subsequently higher root exudations which enhance the microbial activities in soil. Green house experiments were conducted to evaluate the effect of MgO nano particles spray on maize plant (Zea mays L.) in three benchmark soils of India which are phosphorus (P) deficient.

10p caygaocaolon2 11-03-2020 14 1   Download

An experiment was carried out in the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani during 2017-18 in order to evaluate the effect of phosphate solubilizers on the activity of different enzymes and microbial parameters in the soil and its impact on crop growth and yield of test crop tomato var. Vellayani Vijai. The experiment was laid out in a randomized block design with fourteen treatments and three replications. Treatments were the combinations of four doses of P (100%, 75%, 50%, 25%) along with P solubilizers (AMF, Pseudomonas, and Bacillus.).

13p nguathienthan3 27-02-2020 27 0   Download

A field experiment was conducted at Research Farm, Dr. RPCAU Pusa, Bihar during kharif 2018 on calcareous sandy loam soil, having pH 8.57, medium in soil organic carbon content (0.65 %), EC 0.35 dSm-1 , available nitrogen (195 kg/ha), available phosphorus (26.63 kg/ha) and available potassium (134 kg/ha). Experiment was laid-out in split-plot designand replicated thrice. Main-plot included three crop establishment methods, viz. dry direct-seeded rice (DSR-dry), wet direct-seeded rice (DSR-wet) and puddled transplanted rice (TR).

9p nguaconbaynhay3 07-02-2020 33 1   Download

Laboratory experiments were conducted to isolate screen and select the efficient Psolubilizing fungal isolates from soybean rhizosphere in the districts of Northern Karnataka. 24 P-solubilizing fungal isolates were obtained from the soil samples and were screened for phosphorus solubilizing ability on Pikovskaya’s agar and broth BS-9(1) showed highest phosphorus solubilizing activity.

10p kethamoi2 14-12-2019 9 0   Download

Nitrogenous fertilizers applied to soil undergo various physico-chemical and biological transformations due to influence of different enzymes and microbial activity and thereby become available to crops. The efficient use of nitrogen is recognized as an important production factor for rice production but it has always been a problem to raise its utilization rate by rice and to increase efficiency of absorbed nitrogen for grain production. Even with the best agronomic practices only 30-40 percent of applied nitrogen is actually utilized by the crop.

12p nguaconbaynhay1 04-12-2019 27 2   Download

Greenhouse experiment was conducted to assess the soil biochemical change patterns in soils of arbuscular mycorrhizal fungus (AMF)-inoculated and uninoculated maize plants fertilized with varying levels of P and Zn. Soil samples were collected for mycorrhizal spores, microbial communities, available micronutrients and phosphorus (P) contents besides organic and biomass carbon (BMC), soil enzymes and glomalin. Major portion of Fe and Zn fractionations was found to occur in the residual form.

17p chauchaungayxua1 04-12-2019 31 0   Download