Growth responses in Curcuma longa L. to application of chitin and chitosan (Record no. 290581)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 06274nam a22001937a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 633.8 |
| Item number | KAR/GR PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Karthika Thankachan |
| 245 ## - TITLE STATEMENT | |
| Title | Growth responses in Curcuma longa L. to application of chitin and chitosan |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of Plantation Crops and Spices, College of Agriculture |
| Date of publication, distribution, etc | 2023 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | x, 87p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc |
| 520 3# - SUMMARY, ETC. | |
| Abstract | The present study entitled “Growth responses in Curcuma longa L. to application of chitin and chitosan” was conducted at the Department of Plantation Crops and Spices, College of Agriculture, Vellayani, Thiruvananthapuram during 2020-2023 with the objective to evaluate plant growth, yield and curcumin content of Curcuma longa L. in response to soil application of biopolymers, chitin and its deacetylated derivative, chitosan. The planting material of turmeric variety Sona for the study was procured from College of Agriculture, Vellanikkara. The rhizomes were cut into small bits of 8-10g, each consisting of two buds and were sown in protrays. After 30 days, the plantlets were transplanted to growbags. Chitin was applied to potting media and chitosan solution was applied as soil drenching (SD) at varying concentrations and frequencies viz., at transplanting (0 MAT) and 60 days after transplanting (2 MAT), to study the growth responses in C. longa. A foliar spray (FS) with chitosan @ 0.1% at monthly intervals was given as positive control. The experiment was laid out in Completely Randomized Design (CRD) with ten treatments and three replications. The treatment consisted of chitin 10 g per plant applied at 0 MAT (T1), chitin 10 g per plant applied at 0 MAT and 2 MAT (T2), chitin 15 g per plant applied at 0 MAT (T3), chitin 15 g per plant applied at 0 MAT and 2 MAT (T4), chitosan 0.2 % SD at 0 MAT (T5), chitosan 0.2 % SD at 0 MAT and 2 MAT (T6), chitosan 0.6 % SD at 0 MAT (T7), chitosan 0.6 % SD at 0 MAT and 2 MAT (T8), chitosan 0.10% FS at monthly intervals (T9) and absolute control without chitin or chitosan (T10). The observations on plant growth parameters viz., plant height, number of leaves, number of tillers and leaf area were recorded at monthly intervals from 0 to 6 MAT. These parameters showed significant variation among the treatments. At 6 MAT, T9 recorded maximum plant height (116.76 cm) which was observed to be on par with T3. The number of leaves (24.95) and leaf area (896.27 cm 2 ) were also observed to be maximum in T9 which was on par with T3 and T4. T9 reported maximum number of tillers (6.83) also. The data on rhizome and root parameters were recorded at harvest. The rhizome spread (25.48 cm) and thickness (3.79 cm) were found to be maximum in T9 and was on par with T2, T3 and T4. The application of chitin and chitosan did not influence root length and root spread of turmeric rhizome. The root weight was found highest in T9 (fresh - 29.58 g plant-1 and dry – 13.66 g plant-1 ), which was on par with T1, T2, T3 and T4. The effect of chitin and chitosan application on chlorophyll content and defense enzymes (peroxidase and polyphenol oxidase) were recorded at 4 and 6 MAT. T9 exhibited higher leaf chlorophyll, peroxidase and polyphenol oxidase content at both the stages. The quality parameters viz., carbohydrate, volatile oil, oleoresin, curcumin content of turmeric rhizome were found to be significantly influenced by the application of chitin and chitosan. The carbohydrate content was also observed to be higher in T9 (14.49 mg g-1 ) and was on par with T3 and T4. T9 reported the highest volatile oil (5.13 %), oleoresin (13.30 %) and curcumin (8.06 %) content, which was found to be on par with T1, T2, T3 and T4. The population of beneficial microorganisms present in the plant root zone was significantly influenced by the application of chitin and chitosan. T4 recorded the highest nitrogen fixing bacterial count (72.20 x 103 cfu g-1 soil). The largest population of phosphate solubilizers (7.10 x 103 cfu g-1 soil) was also recorded in T4, which was on par with T3 and T8. The chitin and chitosan treatments significantly influenced the yield parameters of turmeric. The number, length, girth and weight of mother, primary and secondary rhizomes were found to be highest in T9. The number of fingers were found to be the highest in T3 (32.27) which was on par with T9 (31.40). T9 recorded significantly higher fresh (504.93 g plant-1 ) and dry (137.23 g plant-1 ) rhizome yield. Total dry matter content (191.27 g plant-1 ) was found to be the highest in T9. This value was on par with T3. The uptake of N and P was found to be significantly higher in T3 and T9. There was no significant variation among the treatments in the uptake of K. The harvest index of turmeric plants showed significant variation among the treatments. The harvest index was reported to be the highest in T9. Among the various treatments tried, significantly higher benefit cost ratio (1.88) was observed with T9. In the study, among the treatments involving foliar and soil application of chitin and chitosan, the foliar spray of 0.1% chitosan at monthly intervals exhibited the best results in terms of growth, metabolite production, yield and benefit cost ratio. On comparing the soil application of chitin and chitosan, chitin 15 g per plant applied at transplanting showed better performance with respect to growth, metabolite production and yield. This treatment (T3), though followed chitosan foliar spray with respect to yield, was observed to be on par with respect to quality parameters. All the treatments involving chitin application gave better performance in terms of yield and quality (volatile oil, oleoresin and curcumin content) over the control and in comparison to the soil application of chitosan. Based on the observations of the present research programme, further field study has to be envisaged to confirm the effect of soil application of chitin and chitosan. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plantation crops and spices |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Curcuma longa L. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Turmeric |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Application of chitin and chitosan |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Deepa S Nair (Guide) |
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Thesis | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2023-09-18 | 633.8 KAR/GR PG | 175771 | 2023-09-18 | Theses |