全文获取类型
收费全文 | 201篇 |
免费 | 17篇 |
国内免费 | 15篇 |
专业分类
林业 | 1篇 |
农学 | 2篇 |
基础科学 | 1篇 |
6篇 | |
综合类 | 50篇 |
农作物 | 1篇 |
水产渔业 | 80篇 |
畜牧兽医 | 92篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 11篇 |
2018年 | 7篇 |
2017年 | 5篇 |
2016年 | 13篇 |
2015年 | 5篇 |
2014年 | 11篇 |
2013年 | 13篇 |
2012年 | 16篇 |
2011年 | 13篇 |
2010年 | 9篇 |
2009年 | 17篇 |
2008年 | 14篇 |
2007年 | 6篇 |
2006年 | 5篇 |
2005年 | 13篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 3篇 |
2001年 | 12篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 5篇 |
1995年 | 4篇 |
1994年 | 7篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1980年 | 1篇 |
排序方式: 共有233条查询结果,搜索用时 31 毫秒
231.
Ayodeji A. Adeoye Sam O. Obasa Femi J. Fawole Alex H. L. Wan Simon J. Davies 《Aquaculture Nutrition》2020,26(3):772-780
A feeding trial was conducted to evaluate the potential of dietary supplementation of autolysed brewer's yeast (AY) on African catfish. The catfish (22.5 ± 1.15 g/fish, 20 fish 33 L/tank) were fed with either of diets (390 g/kg crude protein, 140 g/kg lipid) supplemented with 0, 3, 6 or 10 g/kg AY (n = 3). After 49 days of feeding, the final body weight and metabolic growth rate of the catfish fed 3 g/kg AY (3‐AY) diet were higher than those fed the control diet (p < .05). The lowest level (p < .05) of alanine transaminase was detected in the blood of the catfish fed 3‐AY diet. The mid‐intestinal histology of the catfish revealed no significant difference (p > .05) in intestinal perimeter ratio. However, an elevated (p < .05) abundance of goblet cells and intraepithelial leucocytes were found in the intestine of catfish fed 3, 6 and 10 g/kg AY diets, with the highest level of abundance recorded in the mid‐intestine of the catfish fed 3‐AY diet. The results suggest that dietary 3 g/kg autolysed brewer's yeast supplementation improves growth performance of African catfish without deleterious effect on liver functionality and gut morphology. 相似文献
232.
F.T. BARROWS T.G. GAYLORD W.M. SEALEY C.E. SMITH L. PORTER 《Aquaculture Nutrition》2010,16(6):654-661
Replacement of fish meal with plant products in aquafeeds results in the elimination of dietary compounds which may be important for optimal growth and physiology. A study was conducted to determine if supplementation with macro‐minerals and/or inositol would improve performance of rainbow trout (Oncorhynchus mykiss) fed a plant‐based diet. Four iso‐caloric and iso‐nitrogenous diets (40 g kg?1 protein and 15 g kg?1 lipid) were formulated and consisted of a fish meal‐based control diet (control) and three plant‐based experimental diets. Plant‐based diets were supplemented with either macro‐minerals and inositol (+MM+I), no macro‐minerals with inositol (?MM+I), and no macro‐minerals and no inositol (?MM?I). Sodium chloride, potassium chloride and magnesium oxide were the sources used in the macro‐mineral premix. There was no effect of diet on survival, but there was an effect of diet on weight gain, FCR, feed intake, HSI and nutrient retentions. Significant liver pathology was observed in trout fed plant‐based diets without MM supplementation. Supplementation of MM and inositol significantly improved weight gain of trout fed a plant‐based diet. Supplementation of MM and/or inositol also improved PRE and ERE. This study demonstrates the importance of supplementing these nutrients to trout fed fish meal free diets. 相似文献
233.
Robert J Michael Gavin J Partridge Thomas Hofmann Emmanuel D Caro 《Aquaculture Research》2010,41(11):e788-e794
Barramundi (Lates calcarifer, Bloch) fed live mosquito fish (Gambusia holbrooki, Girard) exhibited faster growth and a better food conversion ratio (on a dry‐weight basis) than those fed an iso‐calorific ration of commercial barramundi pellets and a 50:50 ration of mosquito fish and pellets. The improved performance of barramundi fed mosquito fish was attributed to their higher protein content, higher protein to energy ratio and lower carbohydrate content. The essential amino acid indices and fatty acid profiles of the two diets were similar, suggesting that imbalances or deficiencies in these nutrients were not the limiting factor to the slower growth of barramundi fed on pellets. The use of mosquito fish as barramundi food offers a potential use of this noxious species and may allow barramundi to be cultured without the use of conventional fish meal. 相似文献