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Root phenomics and soil biological acitivity in response to thermochemical organic fertilizer application
A study entitled ‘Root phenomics and soil biological activity in response to thermochemical organic fertilizer application’ was conducted from October 2017 to April 2019 at the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani with the objective of studying th...
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| Format: | Ph.D Thesis |
| Wydane: |
Vellayani
Deapartment of Soil Science and Agricultural Chemistry, College of Agriculture
2019
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| Hasła przedmiotowe: |
| LEADER | 05480nam a22001697a 4500 | ||
|---|---|---|---|
| 999 | |c 193884 |d 193884 | ||
| 082 | |a 631.4 |b RAM/RO PG | ||
| 100 | |a Ramesha G K | ||
| 245 | |a Root phenomics and soil biological acitivity in response to thermochemical organic fertilizer application | ||
| 260 | |a Vellayani |b Deapartment of Soil Science and Agricultural Chemistry, College of Agriculture |c 2019 | ||
| 300 | |a 137p | ||
| 502 | |a MSc | ||
| 520 | 3 | |a A study entitled ‘Root phenomics and soil biological activity in response to thermochemical organic fertilizer application’ was conducted from October 2017 to April 2019 at the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani with the objective of studying the root phenomics and soil biological activity in response to thermochemical organic fertilizer application as compared with conventional organic manures and its effect on growth and yield of amaranthus. Characterization of farmyard manure (FYM), poultry manure (PM), conventional compost (CC), vermicompost (VC), microbial inoculant compost (MC), thermochemical organic fertilizer (TOF) and TOF fortified (TOF-F) with N (1.5%), P (1%), Ca (1%), Mg (0.5%), Zn (50ppm) and B (5ppm) were done. Manures had slightly acidic to neutral pH and safe limits of EC. TOF had the highest TOC. N and P of TOF- F and PM were on par. K, Ca, S, Mn, Zn, Cu and B were highest in TOF-F. Though the nutrient content of TOF was less than that of TOF-F, but statistically superior to FYM, CC and VC. Heavy metals (Pb, Cd) were below detectable limits. A pot culture trial of Amaranthus (var. Arun) was done using growing media comprises of perlite: coir pith compost: organic manure for 30 days in CRD with a no manure control. The pH of the growing media decreased slightly at harvest but EC increased. OC and K were highest in TOF-F while PM had the highest N and P. Dehydrogenase activity (DA) and microbial load of TOF-F were on par with MC. While the N content in TOF-F (2.85 %) was on par with PM in the shoot, P content was on par in shoot and root. The highest root and shoot K was in TOF-F. Shoot Ca, S, Mn, Zn, Cu, B were highest in TOF-F while Mg was highest in PM and Fe in MC. Shoot and root nutrient contents of TOF were higher than FYM and CC. TOF-F was superior in shoot weight and number of primary branches whereas plant height and shoot dry matter content were on par with PM. Shoot yield was significantly higher in TOF than in FYM and CC. Total root length (34.75cm), root weight (30.31g plant-1), root volume (11cm3), root dry weight (3.37g plant-1) and root diameter (10.5 mm) were highest with TOF-F. TOF had significantly higher root characters than FYM and CC. Root: shoot ratio of TOF-F was lower than VC and MC. Field micro plot trial with amaranthus (var. Arun) was conducted successively for three seasons (C1, C2, C3) in RBD at the Model Organic Farm, Vellayani. Treatments were FYM (organic POP) and PM, CC, VC, MC, TOF and TOF-F on nitrogen equivalent basis. Site soil had strongly acidic pH, safe EC, medium OC, low N, K and high P. Ca, S and B were deficient. Soil pH progressively decreased whereas EC and OC increased. N, P and Mg contents of TOF-F were on par with PM whereas K, Zn, Cu and B were highest in TOF-F. Soil available nutrients except Mg were higher in TOF than FYM. Plant N of TOF-F was on par with PM in C2 and C3. TOF was superior to FYM in plant N. Shoot P in TOF-F was on par with MC after C1 and C3. Shoot K was consistently highest in TOF-F. Root P, K, Ca, S and micronutrients were highest in TOF-F. TOF was superior to FYM, CC and VC in root N. Bacterial count was highest in TOF-F after C2 and C3. Bacteria in TOF was significantly higher than FYM and CC. Actinomycetes were highest in TOF-F after C1. DA and microbial biomass carbon (MBC) of TOF-F after C2 and C3 were on par with MC. DA and MBC of TOF were significantly higher than FYM and CC. Plant height, shoot weight and shoot dry weight of TOF-F were highest after C2 whereas plant height and shoot yield in TOF was superior to FYM, CC and VC. Total root length, root volume and root diameter were highest in TOF-F. Total root length and root weight of TOF was superior to FYM, CC and VC. Root weight and root dry matter were highest in TOF-F in C1 and C3 and on par with PM after C2. The root: shoot ratio of TOF-F was lower than FYM in C1 and C3 and PM in C2. B:C ratio was highest for TOF-F (1.75) which was on par with PM. B:C ratio of TOF (1.62) was superior to MC, FYM, VC and CC. The thermochemical organic fertilizer enhanced soil organic carbon and possessed comparable fertility value as conventional organic manures and is environmentally safe since heavy metal content is below detectable level. Fortification of thermochemical organic fertilizer facilitated efficient root phenomic characters coupled with proliferation of rhizospheric microorganisms, which favoured enhanced mineralisation of soil available nutrients and root nutrient acquisition. Thermochemical organic fertilizer is an effective and efficient substitute for conventional organic manures and its fortification with nutrients helped for realising higher productivity and profitability in amaranthus. | |
| 650 | |a Soil Science and Agricultural Chemistry | ||
| 700 | |a Naveen Leno (Guide) | ||
| 942 | |2 ddc |c TH | ||
| 952 | |0 0 |1 0 |4 0 |6 631_400000000000000_RAM_RO_PG |7 1 |8 REF |9 200515 |a KAUCLV |b KAUCLV |c THESES |d 2019-12-26 |o 631.4 RAM/RO PG |p 174682 |r 2019-12-26 |w 2019-12-26 |y TH | ||