Zinc fertifortification of rice (Oryza sativa L.) cultivars (Record no. 289351)
[ view plain ]
000 -LEADER | |
---|---|
fixed length control field | 06374nam a22001937a 4500 |
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
Classification number | 630 |
Item number | NAM/ZI PG |
100 ## - MAIN ENTRY--PERSONAL NAME | |
Personal name | Namitha Krishna |
245 ## - TITLE STATEMENT | |
Title | Zinc fertifortification of rice (Oryza sativa L.) cultivars |
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
Place of publication, distribution, etc | Vellayani |
Name of publisher, distributor, etc | Department of Agronomy, College of Agriculture |
Date of publication, distribution, etc | 2021 |
300 ## - PHYSICAL DESCRIPTION | |
Extent | 112p. |
502 ## - DISSERTATION NOTE | |
Dissertation note | M Sc |
520 ## - SUMMARY, ETC. | |
Abstract | An experiment entitled “Zinc fertifortification of rice (Oryza sativa L.) cultivars” was conducted during 2019-2021 at College of Agriculture, Vellayani. The main objective of the study was to enhance the grain Zn content of rice cultivars through Zn fertilization. The field experiment was carried out in farmer’s field at Southern Coastal Plain (AEU 1) during the kharif season 2020-21. The field experiment was laid out in Randomised Block Design (with two factors) and was replicated thrice. The treatment combinations included four medium duration rice varieties viz., Uma (V1), Pournami (V2), Gouri (V3), DRR Dhan 45 (V4) and four foliar Zn fertilization viz., without ZnSO4 (F1), ZnSO4 @ 0.1 per cent at maximum tillering (MT) and milk (M) stages (F2), ZnSO4 @ 0.5 per cent at MT and M stages (F3), ZnSO4 @ 1.0 per cent at MT and M stages (F4). The growth parameters such as plant height, number of tillers per hill and dry matter production at panicle initiation and harvest stages were significantly influenced by foliar Zn fertilization. ZnSO4 @ 1.0 per cent (F4) recorded taller plants (80.5 and 113 cm), higher tillers per hill (20.2 and 15.7 nos.) and higher dry matter production (12.0 and 28.9 g hill-1 ) at panicle initiation and harvest stages respectively, and were comparable with ZnSO4 @ 0.5 per cent (F3). Higher leaf area index 3.87 recorded at panicle initiation stage in ZnSO4 @ 1.0 per cent (F4) was comparable to ZnSO4 @ 0.5 per cent (F3). Higher spikelets per panicle (120 nos.) and filled grains per panicle (78.0 nos.) recorded in Uma (V1) were statistically similar to Pournami (V2). Sterility per cent (35.2) and thousand grain weight (25.6 g) recorded in Uma (V1) was higher and comparable to DRR Dhan 45 (V4). ZnSO4 @ 1.0 per cent (F4) recorded higher values for yield attributes such as productive tillers per square meter (459 nos.), grain weight per panicle (2.37 g), spikelets per panicle (119 nos.), filled grains per panicle (83.3 nos.), which were comparable to ZnSO4 @ 0.5 per cent (F3). Foliar fertilization with ZnSO4 @ 1.0 per cent (F4) produced higher grain 4.65 t ha-1 and straw 4.85 t ha-1 yield, and was comparable to ZnSO4 @ 0.5 per cent (F3) which recorded grain and straw yield of 4.62 and 4.81 t ha-1 respectively. The increase in grain and straw yield due to ZnSO4 @ 0.5 per cent (F3) were 12.1 to 11.1 per cent respectively over the control plot (without ZnSO4 ) (F1). Biofortified rice variety DRR Dhan 45 (V4) recorded significantly higher Zn content in rough rice (28.6 mg kg-1 ) and its milled fractions viz., brown rice (33.7 mg kg1 ), white rice (25.3 mg kg-1 ), rice husk (51.1 mg kg -1 ) and rice bran (97.7 mg kg-1 ). Significantly higher Zn content was recorded in boiled rice (16.6 mg kg-1 ) and decanted rice water (19.9 mg kg-1 ) of variety DRR Dhan 45 (V4). As a variety with high Zn content in rough rice and its milled fractions, Gouri (V3) was second only to DRR Dhan 45 (V4). Among non biofortified rice varieties, lower Zn content in rough rice (18.8 mg kg-1 ), brown rice (16.3 mg kg-1 ), white rice (12.2 mg kg-1 ), rice husk (24.7 mg kg -1 ) and rice bran (47.1 mg kg-1 ) was recorded in Uma (V1) and was comparable with Pournami (V2). Lower Zn content recorded in boiled rice (8.0 mg kg-1 ) and decanted rice water (9.6 mg kg-1 ) of variety Uma (V1) was comparable to Pournami (V2). Foliar fertilization with ZnSO4 @ 1.0 per cent (F4) could increase Zn content in rough rice (24.0 mg kg-1 ), brown rice (28.3 mg kg-1 ), white rice (21.2 mg kg-1 ), rice bran (82.0 mg kg-1 ), boiled rice (13.9 mg kg-1 ), decanted rice water (16.7 mg kg-1 ). However, it was comparable with ZnSO4 @ 0.5 per cent (F3) which recorded Zn content of 22.0, 26.0, 19.5, 75.3, 12.8 and 15.4 mg kg-1 in rough rice, brown rice, white rice, rice bran, boiled rice, and decanted rice water respectively. Zn content in rice husk (54.6 mg kg-1 ) was significantly increased by ZnSO4 @ 1.0 per cent (F4). NPK content of grain and straw was enhanced by ZnSO4 @ 1.0 per cent (F4) resulting in higher plant uptake of NPK, which was comparable with ZnSO4 @ 0.5 per cent (F3). Varieties DRR Dhan 45 (V4) and Uma (V1) resulted in Zn biofortification recovery efficiency (ZnBRE) of 3.26 and 1.39 per cent respectively. Significantly higher ZnBRE efficiency of 3.14 per cent was recorded in ZnSO4 @ 0.5 per cent (F3), ZnSO4 @ 1.0 per cent (F4) recorded ZnBRE of 1.99 per cent. Economic analysis revealed highest gross income (₹ 140474 ha-1 ), net income (₹ 46900 ha-1 ) and benefit: cost ratio (1.50) in treatment combination non biofortified variety Uma foliar fertilized with ZnSO4 @ 0.5 per cent (v1f3). Increasing the foliar fertilized ZnSO4 from 0.5 per cent (v1f3) to 1.0 per cent (v1f4) in variety Uma could bring about only negligible increase in gross income, net income and benefit: cost ratio by 0.5 per cent, 1.1 per cent and 0.3 per cent respectively. Biofortified variety DRR Dhan 45 foliar fertilized with ZnSO4 @ 0.5 per cent (v4f3) recorded gross income, net income and benefit: cost ratio of ₹ 135753 ha-1 , ₹ 42019 ha-1 and 1.45 respectively. Increasing foliar fertilization of ZnSO4 from 0.5 per cent to 1.0 per cent resulted in an increment in gross income, net income and benefit: cost ratio by 1.2 per cent, 3.5 per cent and 0.7 per cent respectively. The present study indicated that foliar fertilization with ZnSO4 @ 0.5 per cent at maximum tillering and milk stages as an economically viable option to significantly increase grain and straw yield of rice, and also to increase Zn content in rough rice and its milled fractions, resulting in increased Zn content in boiled rice and decanted rice water, irrespective of the rice variety. |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
Topical term or geographic name as entry element | Agronomy |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
Topical term or geographic name as entry element | Zinc fertifortification |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
Topical term or geographic name as entry element | Rice |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
Topical term or geographic name as entry element | Oryza sativa L. |
700 ## - ADDED ENTRY--PERSONAL NAME | |
Personal name | Jacob, D (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 |
---|---|---|---|---|---|---|---|---|---|
Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2022-04-22 | 630 NAM/ZI PG | 175291 | 2022-04-22 | Theses |