AI SearchDynamics and recovery of phosphorus in mud of fertilized fish ponds (Record no. 32109)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04715cas|a2200385 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818094310.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 171197s1994 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10216042 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Diss. no. AE-94-02 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Shrestha, Madhav Kumar |
| 245 10 - TITLE STATEMENT | |
| Title | Dynamics and recovery of phosphorus in mud of fertilized fish ponds |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1994 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 206 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Dissertation ; |
| Volume/sequential designation | no. AE-94-02 |
| 500 ## - GENERAL NOTE | |
| General note | A dissertation submitted in partial fulfillment of the requirement for the degree of Doctor of Technical Science, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (Ph.D.) - Asian Institute of Technology, 1994 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | A series of six experiments was conducted to study the effects of pond bottom soil types on phosphorus (P) saturation level and its relation to P fertilization; to study the nutrient recovery potentials from bottom soils by rooted macrophytes and upland crops. Pond muds accumulate P in two forms; (1) adsorbed inorganic P and (2) deposited organic P. P adsorption in mud is related to cations (A13+ , Fe3+ , Ca2+) content in clay and clay content (%) in mud. can represent its adsorption capacity. P adsorption is slower below 5-cm depth and cation P adsorption capacity is a linear function of clay content (%) in mud. Therefore, level of P saturation (%) in mud can be calculated by initial cation P and clay content (%) in the top 5-cm of pond mud using the equation: P saturation (%) = initial cation P (mg/g soil) x 100 / P adsorption capacity (mg/g soil). The results show positive linear relationship between soluble reactive P (SRP) availability and mud P saturation level. and negative correlation between added P loss from water column and mud P saturation level. Biogenic P was a major source of P sedimenter, With a rate twice higher than that in direct adsorption of inorganic P in mud. Bioturbation facilitates release of loosely bound P (loose-P) and aluminum bound P (A1-P) but it also leads to adsorb iron bound P (Fe-P) and calcium bond P (Ca-P) in mud at pH 7-9. Increasing the SRP concentration in the water Column up to 0.3-0.4 mg/L is sufficient for the fish pong as higher SRP concentration will increase primary productivity, nor fish yield. The concentration of SRP can be achieved with a P fertilization rate of 0.2 g, 0.1 g and 0.05 g/m3/day and N:P ratios of 2:1, 4:1 and 8:1 when the level of P fertilization rate for tropical ponds in a semi-intensive system should be 0.2 g, 0.1 g and 0.07 g/m2/day (2 kg, 1 kg and 0.7 kg/ha/day) with a N:P ratio of 2:1, 4:1 and 6:1 for below 50%, 50-80% and above 80% P saturated muds, respectively, to compensate the P adsorption below 5-cm depth which is slow but continuous. Organic P deposited in pong bottom can be recovered by enhancing oxidation to mineralize organic matter by drying the pond at an optimal 20-40% moisture for two weeks. oxidation of pond mud certainly enhances the adsorption of mineralized P but, its rate and amount depend on P saturation level in mud. Once the partial saturation of P in mud increases, mineralized P released from organic matter to water column will be greater than mud adsorption, Rooted plants can mobilize the adsorbed P in mud. Due to frequent liming in pond preparation, a considerable amount of P is adsorbed by Ca ion. Plant roots are capable of extracting Ca-P from mud. Roots of semiaquatic taro crop is efficient to utilize Fe-P in mud in reduced environment P fertilization strategy based on mud P saturation level has been discussed. Procedure for estimating mud P saturation level and corresponding P fertilization relate to tropical semi intensive fish pong is suggested. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Fish ponds |
| General subdivision | Fertilization |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lin, Chang Kwei, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Edward, Peter, |
| Relator term | Examination committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Chongrak Polprasert, |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Upasena, Selawa H., |
| Relator term | Examination committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Boyd, Claude E., |
| Relator term | Examination committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Government of Australia, |
| Relator term | Scholarship donor |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology Fellowship, |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Dissertation ; |
| Volume/sequential designation | no. AE-94-02 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B00319">http://203.159.5.9/ait-thesis/detail.php?q=B00319</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10216042 |
| b | mnait |
| c | u |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240329 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 1 |
| Cataloger's initials, CIN (RLIN) | 951206 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | u |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120563894 |
| CREATED | CREATED : 1995-06-12 |
| RECORD Id | RECORD # : i11673011 |
| LPATRON | LPATRON : 1015151 |
| LCHKIN | LCHKIN : 2019-02-04 |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 2 |
| -- | TOT RENEW : 3 |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | AIT Diss. no. AE-94-02 | 30050120563894 | 18/08/2026 | 3 | 18/08/2026 | 22-AIT Thesis (Replacement) |