AI SearchThe effects of light intensity, fertilization and water depth on the production of Lemna (Record no. 35209)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04053cas a2200409 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818095254.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 111010s1992 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10230749 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. AE-92-27 |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Sujjat-Al-Azad |
| 245 14 - TITLE STATEMENT | |
| Title | The effects of light intensity, fertilization and water depth on the production of Lemna |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1992 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 106 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. AE-92-27 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted to the partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.sc.) - Asian Institute of Technology, 1992 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Three experiments were conducted in an outdoor system of fifteen circular concrete tanks each of 2.07m~ area, to investigate the effects of light intensity, urea- N and triple super phosphate- P, and water depth on the production and nutrient uptake of Lemna perpusilla. Experiment 1 involved a fertilization rate of 0.25g N/m3 /day and a water depth of 1.0m at 301., 401., 651., 80/. and 100/. ambient light; Experiment 2 involved a 30/. ambient light in O. lg, 0.2g, 0.3g, 0.4g and 0.5g N/m3 /day (N:P ratio 2:1) in a depth of 1.0m; and Experiment 3 involved a fertilization rate of 0.25g N/m3 /day and with 30/. ambient light, and 0.2m, 0.4m, 0.6m, O.Bm and 1.0m water depths of tanks. The highest extrapolated net yields in the three experiment were, 3.486 tonnes/ha/yr in Experiment 1 with 0.25g N/m3 / day in 1.0m depth and with a 30/. ambient 1 ight when photosynthetic active radiation was 3 to 11 Umol/m-2/s-.1.; and with a fertilization rate of 0.25g N/m3 /d and with 30/.light, in a depth of 0.4m it was 3.515 tonnes/ha/yr, and in Experiment 2 with a varying rates of fertilization and 30/. light, the yield was 3.78 tonnes/ha/yr in the lowest concentration rate of O.lg N/m3 /day . Nitrogen contents in Lemna were not significantly different (p>0.05), but phosphorus contents were significantly different (p<0.05) in the first two experiments. The experiment with depth showed significance differences in nitrogen and phosphorus contents in Lemna (p<0.05). Nitrogen and phosphorus contents increased with nutrient loading rate. Most of the nitrogen added remained in the water in all experiments, except in the experiment with a fertilization rate of O.lg N/m3 /day, with 30/. ambient light; and 0.4m tank in an experiment with 0.25g N/m3/day and 30/. light, where the largest amounts, 55.79/. and 52.8/. respectively, were taken up by Lemna. On the other hand, phosphorus always showed the highest accumulation in the sediments in all experiments, except for the nutrient loading rate and depth mentioned above, where Lemna contained the largest amoL1nt of added nitrogen, 39.12/. and 42.21., respectively. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Lemna |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Edwards, Peter, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Little, David C., |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yakupitiyage, Amararatne, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | The British Council, |
| 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 | Thesis ; |
| Volume/sequential designation | no. AE-92-27 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B16540">http://203.159.5.9/ait-thesis/detail.php?q=B16540</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10230749 |
| b | mnait |
| c | s |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240329 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 2 |
| Cataloger's initials, CIN (RLIN) | 951012 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | s |
| -- | 4 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 20-AIT Publication |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003007837 |
| CREATED | CREATED : 1994-05-17 |
| RECORD Id | RECORD # : i10281290 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050004436795 |
| CREATED | CREATED : 1994-05-17 |
| RECORD Id | RECORD # : i10281307 |
| LPATRON | LPATRON : 1009682 |
| LCHKIN | LCHKIN : 1997-11-21 |
| RENEWALS | # RENEWALS : 0 |
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| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120300768 |
| CREATED | CREATED : 2016-05-27 |
| RECORD Id | RECORD # : i13001437 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 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 Thesis no. AE-92-27 | 30050003007837 | 18/08/2026 | 1 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | AIT Thesis no. AE-92-27 | 30050004436795 | 18/08/2026 | 2 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no. AE-92-27 | 30050120300768 | 18/08/2026 | 18/08/2026 | 40-Archives |