Characterisation of biological pools of carbon, nitrogen and phosphorous in soils of rice ecosystems in Meghalaya / (Record no. 3990)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02875nam a2200229Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20230317121120.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 130502s9999 xx 000 0 und d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CPGS |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 631.41 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Sangma, Christy Berylnight K. |
| 9 (RLIN) | 765 |
| 245 ## - TITLE STATEMENT | |
| Title | Characterisation of biological pools of carbon, nitrogen and phosphorous in soils of rice ecosystems in Meghalaya / |
| Statement of responsibility, etc | by Christy Berylnight K.Sangma |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Umiam: |
| Name of publisher, distributor, etc | CPGS, CAU |
| Date of publication, distribution, etc | c2011 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | [24], 98p.: |
| Other physical details | il., |
| 440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE | |
| Title | [Soil Science and Agricultural Chemistry, School of Natural Resource Management] |
| 9 (RLIN) | 766 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Soil ecosystems are complex and biogeochemistry of soils is governed largely by the functioning of soil biota community through their control over the biological pool of every elemental cycle. Biological pools of carbon (C), nitrogen (N) and phosphorus (P) in soils of hill rice ecosystems in North East India are not yet characterized. This study characterized an array of biological parameters of C, Nand P in soils of three common rice ecosystems viz. slope land, upland terrace and lowland. Soil samples (0-15 cm depth) were collected from six different sites located in two villages (Saiden and Kyrdemkulai) in post-summer and in postwinter seasons. The soil of each site differed significantly between seasons in terms of soil microbial biomass C, Nand P, total and dissolved organic carbon, extractable organic nitrogen, potentially mineralizable nitrogen, basal and substrate induced respiration, total Nand P, available Nand P, soil dehydrogenase and phosphatase activities (P < 0.01, n=20 as determined by paired t-test within a site) and these parameters were strongly influenced by soil moisture content. Pair-wise correlation matrix analysis revealed that biological parameters of C, Nand P were strongly influenced by each other (correlation coefficient r � : 0.36 at P<0.05, or � :0.46 at P<0.0I, n=30). Principal component analysis (PCA) performed season-wise considering the biological parameters as defined variables indicated that rice fields were grouped according to ecosystem type and soil moisture status, and such effects overrided the impacts of site differences in biological pools of C, N and P. Moisture content in soils observed to be a critical variable in hill rice ecosystems that control the size and dynamics of biological pools of C, N and P and the interrelationships among these parameters. Overall, it can be concluded that C and N components of soils in lowland and stabilized upland terrace rice ecosystems seem to be self-sustained, but the major limiting factor was availability of P. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Soil chemistry |
| 9 (RLIN) | 767 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Rice ecosystem |
| General subdivision | Organic nutrients |
| 9 (RLIN) | 768 |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Thakuria, Dwipendra |
| Relator term | Major Advisor |
| 9 (RLIN) | 769 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://krishikosh.egranth.ac.in/handle/1/5810194059">https://krishikosh.egranth.ac.in/handle/1/5810194059</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | MSc Thesis |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Natural Resource Management | CPGS | CPGS | 02/05/2013 | 631.41 SAN | TH037 | 24/01/2020 | 02/05/2013 | MSc Thesis |