東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Practices for improving water qualit...

Seo, Jinwon.

FindBook

Google Book

Amazon

博客來

Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture./
作者:	Seo, Jinwon.
面頁冊數:	65 p.
附註:	Director: Claude E. Boyd.
Contained By:	Dissertation Abstracts International62-01B.
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3002909
ISBN:	9780493117393

Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture.
Seo, Jinwon.

Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture. - 65 p.

Director: Claude E. Boyd.

Thesis (Ph.D.)--Auburn University, 2001.

Research on practices for improving water quality in channel catfish Ictalurus punctatus ponds was conducted at the Auburn University Fisheries Research Station, Auburn, Alabama, in 1998 and 1999. The objective of this two-year study was to determine better management practices to enhance water quality and improve production efficiency. In the first year, oxidation of bottom soil by drying, tilling, and applying sodium nitrate was performed (dry-till and dry-till with sodium nitrate treatments). The second year, based on the results obtained during the first year, precipitation of phosphorus (P) from water by applying gypsum was compared to the dry-till treatment (dry-till and dry-till with gypsum treatments). Control ponds were not subjected to bottom drying, tilling, sodium nitrate, or gypsum treatment. Channel catfish fingerings were stocked at 15,000/ha.

ISBN: 9780493117393Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture.
LDR:03545nam 2200301 a 45 001 951282
005 20110609
008 110609s2001 ||||||||||||||||| ||eng d
020 $a 9780493117393
035 $a (UMI)AAI3002909
035 $a AAI3002909
040 $a UMI $c UMI
100 1 $a Seo, Jinwon. $3 1275262
245 1 0 $a Practices for improving water quality in channel catfish Ictalurus punctatus aquaculture.
300 $a 65 p.
500 $a Director: Claude E. Boyd.
500 $a Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0008.
502 $a Thesis (Ph.D.)--Auburn University, 2001.
520 $a Research on practices for improving water quality in channel catfish Ictalurus punctatus ponds was conducted at the Auburn University Fisheries Research Station, Auburn, Alabama, in 1998 and 1999. The objective of this two-year study was to determine better management practices to enhance water quality and improve production efficiency. In the first year, oxidation of bottom soil by drying, tilling, and applying sodium nitrate was performed (dry-till and dry-till with sodium nitrate treatments). The second year, based on the results obtained during the first year, precipitation of phosphorus (P) from water by applying gypsum was compared to the dry-till treatment (dry-till and dry-till with gypsum treatments). Control ponds were not subjected to bottom drying, tilling, sodium nitrate, or gypsum treatment. Channel catfish fingerings were stocked at 15,000/ha.
520 $a In the first year, water in ponds from dry-till and dry-till with sodium nitrate treatments had lower concentrations (P < 0.01) of soluble reactive P, nitrate (NO3-) and nitrite (NO2-) nitrogen (N), total ammonia (NH3) nitrogen, total suspended solids and turbidity, and higher values of pH, Secchi disk visibility, total alkalinity, total hardness, and calcium (Ca2+) hardness than water in control ponds. Ponds of the dry-till treatment also had lower concentrations (P < 0.01) of total P and total N than control ponds. Total fish production and survival rate did not differ among the treatments (P > 0.05). The findings suggested that drying and tilling pond bottoms between crops could achieve water quality improvement. Applying sodium nitrate to dry, tilled pond bottoms did not provide water quality improvement.
520 $a In the second year, the treatment with the best results from the first year, dry-till, was compared with a dry-till with gypsum treatment. Enough gypsum was applied to give a total hardness of about 200 mg/L, and gypsum was reapplied as needed to maintain the hardness. Compared to the control, dry-till and dry-till with gypsum treatments had lower concentrations ( P < 0.01) of total and soluble reactive P, total N, and total NH3-N, and higher concentrations (P < 0.01) of dissolved oxygen. Ponds of the dry-till with gypsum treatment also had lower concentrations (P < 0.01) of chlorophyll a&barbelow;, chemical oxygen demand, and total alkalinity than the control. Total fish production and survival rate did not differ ( P > 0.05) among the treatments. These findings suggest that drying and tilling pond bottoms between crops and treating low hardness waters with gypsum could achieve water quality improvement.
590 $a School code: 0012.
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
650 4 $a Environmental Sciences. $3 676987
690 $a 0768
690 $a 0792
710 2 $a Auburn University. $3 1020457
773 0 $t Dissertation Abstracts International $g 62-01B.
790 $a 0012
790 1 0 $a Boyd, Claude E., $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3002909