Evaluation of fortified humic acids from grow bag mixtures as phytotonic in okra [Abelmoschus esculentus (L.) Moench.] (Record no. 160006)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05894nam a22001817a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 631.4 |
| Item number | DHA/EV |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Dhanesh Kumar, T V |
| 245 ## - TITLE STATEMENT | |
| Title | Evaluation of fortified humic acids from grow bag mixtures as phytotonic in okra [Abelmoschus esculentus (L.) Moench.] |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of Soil Sciene and Agricultural Chemistry, College of Agriculture |
| Date of publication, distribution, etc | 2017 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 145p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc. |
| 520 3# - SUMMARY, ETC. | |
| Abstract | The research entitled “Evaluation of fortified humic acids from growbag<br/>mixtures as phytotonic in Okra [Abelmoschus esculentus (L.) Moench]” was<br/>undertaken with an objective to study the physicochemical characteristics and<br/>microbial enumeration of different growbag mixtures and the effect of their humic<br/>acids fortified with multinutrient mixture on growth, yield and quality of okra.<br/>The study consisted of two parts, an incubation study and a crop study in grow<br/>bags. Incubation study was carried out for a period of three months maintaining<br/>60% of water holding capacity. Conventional composition of growbag media, soil<br/>+ sand + FYM. The third component FYM was replaced by various composts to<br/>form 6 treatments. T1- soil + sand + FYM, T2 -soil + sand + coirpith compost, T3-<br/>soil + sand + vermicompost, T4- soil + sand + desi cowdung with assorted farm<br/>waste soil, T5- sand + soil+ desi cowdung mixed with straw and Gliricidia, T6-<br/>soil + sand + composted kitchen waste using composting inoculum. Incubated<br/>mixtures were sampled 6 times and analysed for physicochemical properties and<br/>microbial load at fortnightly intervals. Humic acids were extracted from<br/>incubation mixtures and were characterised and fortified with multinutrient<br/>mixture.<br/>The effect of multinutrient fortified humic acids were assessed in the<br/>growbag containing routine potting mixture using okra variety Varsha Uphar as<br/>the test crop during January 2017- April 2017 as per POP recommendations. The<br/>study consisted of eight treatments in which HA1 to HA6, were humic acids<br/>extracted from the incubated growbag media of different composition and<br/>fortified with multinutrient mixture as T1 to T6 respectively, T7- water spray and<br/>T8- extractant spray (0.5 N NaOH). Foliar application of treatments at 0.5 %<br/>concentration were given at fortnightly intervals throughout the crop period. The<br/>plant samples were analysed at fifty percent flowering and at final harvest.<br/>Incubation study recorded neutral to alkaline pH in all media except<br/>coirpith medium (5.49 - 7.5) and kitchen waste inoculum compost (8.75-10.4). EC<br/>of the growing media was non saline in all media except kitchen waste inoculum<br/>compost (7.15 - 8.50 d Sm-1). Available N content was highest in kitchen waste<br/>inoculum compost (703.0 kg ha-1) and all other media were in low to medium<br/>range. Available P content was highest in vermicompost medium (93.9 kg ha-1).<br/>Available K was high in all media except coirpith medium where it was low to<br/>medium and the highest K content was recorded in kitchen waste inoculum<br/>compost (9893 kg ha-1). Ca content was sufficient throughout the incubation in all<br/>media except coirpith during the first fortnight (103.3 mg kg-1). Available Mg<br/>was found to be deficient in coirpith, vermicompost and kitchen waste during the<br/>first fortnight. Available B was highest in kitchen waste compost (6.71 – 3.50 mg<br/>kg-1). Generally, the availability of other micronutrients (Fe, Mn, Cu and Zn) were<br/>not significantly influenced by the composition of the growth media.<br/>Microbial enumeration of incubated samples showed highest bacterial<br/>count from vermicompost (8.88 log cfu /g soil). Fungal population was found to<br/>be maximum in coirpith compost (5.39 log cfu/g soil) and highest count of<br/>actinomycetes was noted in medium with desi cowdung and farm waste. Humic<br/>acids extracted from the vermicompost growth media showed a higher total<br/>acidity of 12 meq g-1 of humic material. Content of humic acids was the highest in<br/>vermicompost media. Time taken for pH stabilization of humic acids was highest<br/>for desi cowdung + farm waste medium.<br/>Crop study in growbag revealed that different humic acids fortified with<br/>multinutrient mixture have significant effect on growth and yield of bhindi.<br/>Application of vermicompost HA (T3) recorded best biometric characters and<br/>yield characters viz., days to flowering (36 days), number of fruits per plant (24<br/>no.), average fruit weight (17.1 g) and a highest yield of (573.15 g plant-1). T3 also<br/>showed maximum keeping quality (9 days) and highest crude protein content<br/>(15.40 %) in fruit. B: C ratio (1.76) was also highest in T3.<br/>The results of plant nutrient analysis indicated that T3 (vermicompost HA)<br/>has the highest content of total N (2.80%) and K (2.52 %), while T6 recorded<br/>highest content of P (0.66%) which was on par with T3. The N, P, K status of T3<br/>was found to be positively correlated with yield. Content of secondary nutrients<br/>was also the highest in T3.<br/>Hence it may be concluded that composition of growth media has<br/>significantly influenced quantity and quality of humic acids. In the incubation<br/>study T6 (kitchen waste compost) recorded the highest nutrient content followed<br/>by T3 (Vermicompost). However, the highest humic acids content was noted in<br/>the medium containing vermicompost comparing the effects of fortified humic<br/>acids, best results in crop study were shown by the vermicompost HA (T3),<br/>followed by the treatment which received HA extracted from medium containing<br/>desi cowdung + assorted farm waste (T4). Hence humic acids extracted from<br/>growing media containing vermicompost, fortified with multinutrient mixture can<br/>be recommended as a phytotonic.<br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Agriculture |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Soil Science and Agricultural Chemistry |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Usha Mathew (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810143460 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Item type | Theses |
| Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 12/04/2018 | 631.4 DHA/EV | 174187 | 12/04/2018 | Theses |