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 mixtures as phytotonic in Okra [Abelmoschus esculentus (L.) Moench]” was undertaken with an objective to study the physicochemical characteristics and microbial enumeration of different growbag mixtures and the effect of their humic acids fortified with multinutrient mixture on growth, yield and quality of okra. The study consisted of two parts, an incubation study and a crop study in grow bags. Incubation study was carried out for a period of three months maintaining 60% of water holding capacity. Conventional composition of growbag media, soil + sand + FYM. The third component FYM was replaced by various composts to form 6 treatments. T1- soil + sand + FYM, T2 -soil + sand + coirpith compost, T3- soil + sand + vermicompost, T4- soil + sand + desi cowdung with assorted farm waste soil, T5- sand + soil+ desi cowdung mixed with straw and Gliricidia, T6- soil + sand + composted kitchen waste using composting inoculum. Incubated mixtures were sampled 6 times and analysed for physicochemical properties and microbial load at fortnightly intervals. Humic acids were extracted from incubation mixtures and were characterised and fortified with multinutrient mixture. The effect of multinutrient fortified humic acids were assessed in the growbag containing routine potting mixture using okra variety Varsha Uphar as the test crop during January 2017- April 2017 as per POP recommendations. The study consisted of eight treatments in which HA1 to HA6, were humic acids extracted from the incubated growbag media of different composition and fortified with multinutrient mixture as T1 to T6 respectively, T7- water spray and T8- extractant spray (0.5 N NaOH). Foliar application of treatments at 0.5 % concentration were given at fortnightly intervals throughout the crop period. The plant samples were analysed at fifty percent flowering and at final harvest. Incubation study recorded neutral to alkaline pH in all media except coirpith medium (5.49 - 7.5) and kitchen waste inoculum compost (8.75-10.4). EC of the growing media was non saline in all media except kitchen waste inoculum compost (7.15 - 8.50 d Sm-1). Available N content was highest in kitchen waste inoculum compost (703.0 kg ha-1) and all other media were in low to medium range. Available P content was highest in vermicompost medium (93.9 kg ha-1). Available K was high in all media except coirpith medium where it was low to medium and the highest K content was recorded in kitchen waste inoculum compost (9893 kg ha-1). Ca content was sufficient throughout the incubation in all media except coirpith during the first fortnight (103.3 mg kg-1). Available Mg was found to be deficient in coirpith, vermicompost and kitchen waste during the first fortnight. Available B was highest in kitchen waste compost (6.71 – 3.50 mg kg-1). Generally, the availability of other micronutrients (Fe, Mn, Cu and Zn) were not significantly influenced by the composition of the growth media. Microbial enumeration of incubated samples showed highest bacterial count from vermicompost (8.88 log cfu /g soil). Fungal population was found to be maximum in coirpith compost (5.39 log cfu/g soil) and highest count of actinomycetes was noted in medium with desi cowdung and farm waste. Humic acids extracted from the vermicompost growth media showed a higher total acidity of 12 meq g-1 of humic material. Content of humic acids was the highest in vermicompost media. Time taken for pH stabilization of humic acids was highest for desi cowdung + farm waste medium. Crop study in growbag revealed that different humic acids fortified with multinutrient mixture have significant effect on growth and yield of bhindi. Application of vermicompost HA (T3) recorded best biometric characters and yield characters viz., days to flowering (36 days), number of fruits per plant (24 no.), average fruit weight (17.1 g) and a highest yield of (573.15 g plant-1). T3 also showed maximum keeping quality (9 days) and highest crude protein content (15.40 %) in fruit. B: C ratio (1.76) was also highest in T3. The results of plant nutrient analysis indicated that T3 (vermicompost HA) has the highest content of total N (2.80%) and K (2.52 %), while T6 recorded highest content of P (0.66%) which was on par with T3. The N, P, K status of T3 was found to be positively correlated with yield. Content of secondary nutrients was also the highest in T3. Hence it may be concluded that composition of growth media has significantly influenced quantity and quality of humic acids. In the incubation study T6 (kitchen waste compost) recorded the highest nutrient content followed by T3 (Vermicompost). However, the highest humic acids content was noted in the medium containing vermicompost comparing the effects of fortified humic acids, best results in crop study were shown by the vermicompost HA (T3), followed by the treatment which received HA extracted from medium containing desi cowdung + assorted farm waste (T4). Hence humic acids extracted from growing media containing vermicompost, fortified with multinutrient mixture can be recommended as a phytotonic. |
| 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 | |
| Item type | Theses |
| Not for loan | Collection code | Permanent location | Current location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
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| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2018-04-12 | 631.4 DHA/EV | 174187 | 2018-04-12 | Theses |