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Proline Accumulation,Photosynthetic Abilities and growth Characters of Sugarcane(Saccharum officinarum L.) Plantlets in Response to Iso-Osmotic Salt and Water-Deficit Stress

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Agricultural Sciences in China 2009年第1期8卷 51-58页

作者： Suriyan Cha-um Chalermpol Kirdmanee National Center for Genetic Engineering and Biotechnology(BIOTEC) National Science and Technology Development Agency(NSTDA)

The aim of this study was to investigate the biochemical, physiological and morphological responses of sugarcane to iso- osmotic salt and water-deficit stress. Disease-free sugarcane plantlets derived from meristem cuttings were photo- autotrophically grown in MS media and subsequently exposed to -0.23 （control）, -0.67 or -1.20 MPa iso-osmotic NaCl （salt stress） or mannitol （water-deficit stress）. Chlorophyll a （Chl a）, chlorophyll b （Chl b）, total carotenoids （Cx＋c）, maximum quantum yield of PSII （Fv/Fm）, photon yield of PSII （ΦPSII）, stomatal conductance （Gs） and transpiration rate （E） in the stressed plantlets were significantly reduced when compared to those of plantlets of the control group （without mannitol or NaCl）, leading to net-photosynthetic rate （Pn） and growth reduction with positive correlation. In addition, physiological changes and growth parameters of plantlets in the salt stress conditions were more sharply reduced than those in waterdeficit stress conditions. On the other hand, the proline content and non-photochemical quenching （NPQ） in the leaves of stressed plantlets increased significantly, especially in response to iso-osmotic salt stress. The chlorophyll pigments in iso-osmotic stressed leaves were significantly degraded （r^2 = 0.93）, related to low water oxidation （r^2 = 0.87）, low net- photosynthetic rate （r^2 = 0.81）, and growth reduction （r^2 = 0.97）. The multivariate biochemical, physiological and growth parameters in the present study should be further used to develop salt, or drought, tolerance indices in sugarcane breeding programs.

关键词： growth performances net-photosynthetic rate pigment degradation proline water oxidation

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growth Performance of Butcher’s Pigs Fed on Diets Made from the Ruminal Contents of Bovine Animals

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Open Journal of Animal Sciences 2022年第3期12卷 428-440页

作者： Ngouana Tadjong Ruben Mube Kuietche Hervé Tsafack Antoine Kana Jean Raphaël Laboratory of Aquaculture and Demography of Fisheries Resources Department of Aquaculture Institute of Fisheries and Aquatic Science of Yabassi University of Douala Douala Cameroon Laboratory of Animal Nutrition Department of Animal Science Faculty of Agronomy and Agricultural Sciences University of Dschang Dschang Cameroon

Both quantitatively and qualitatively, underfeeding materialized by underconsumption of meat remains one of the things most felt in Africa. To make up for this deficit, emphasis is placed on the production of short-cycle animals such as poultry, rabbits and pork. Among these animals, pig plays a very important socio-economic role in the life of local populations. Its meat is required in various ceremonies such as the dowry and funerals. For this purpose, twenty four males cross piglets with Large White × Landrace × Duroc × Pietrain phenotypic traits, aged between 58 and 62 days and having an average weight of 9.978 ± 1.11 kg were used to evaluate the influence of graded levels of bovine rumen content on the growth performances of grower finisher pigs. The piglets were submitted to 4 treatments, housed in pairs and fed ad libitum with a diet containing 0, 5%, 10% and 20% bovine rumen content. The trial which lasted for 18 weeks was carried out at the Teaching and Research Farm of the University of Dschang. The results showed that drying process destroyed most microbes found in the rumen content. These results also showed that the incorporation of bovine rumen content in diets had no significant (p > 0.05) effect on feed conversion ratio efficiency. However, feed intake, body weight and body weight gain were significantly higher in pigs fed with a diet (R5) containing 5% of bovine rumen content. Feed cost per kg of live body weight was significantly (p 20 diet compared to the animals receiving the control diet which was lower than that of the other two diets (R0) and (R5) but comparable with animals fed diet R10. The analysis of the carcass showed that increasing incorporation level of bovine rumen content in the diet reduces abdominal fat and back fat thickness. For offal, the lowest weight was recorded in animals fed the control diet (R0) and the highest weight with animals fed a diet containing 5% bo

关键词： Carcass Characteristics Dried Bovine Rumen Contents growth performances Pigs

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Effects on growth Performance and Feed Digestibility of Hainan Black Pigs by Adding Lysine in Low Protein Diet

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Animal Husbandry and Feed Science 2018年第2期10卷 109-112页

作者： Wei Limin Liu Quanwei Sun Ruiping Zheng Xinli Wang Feng Tan Shuyi Huang Lili Xing Manping Institute of Animal Science and Veterinary Medicine Hainan Academy of Agricultural Sciences Haikou 571100 China Hainan Key Laboratory of Tropical Animal Reproduction & Breeding and Epidemic Disease Research Haikou 571100 China

[Objective] The paper was to study the effects on growth performance and feed digestibility of Hainan black pigs by adding lysine in low prntein diet. [Method] A tntal of 36 Hainan black pigs with the body weight of （46.34±3.06） kg were randomly divided into three groups： con- trol group （protein level 15%, lysine level 0.83%）, experimental grnup 1 （protein level 13%, 0.83%）, and experimental group II （protein level 13%, lysine level 1.03）, each group had three replicates of four pigs. The trial lasted 35 d. [Result] The growth performance of Hainan black pig in grnup II had no significan! difference with that in contrail group （P〉0.05）. The apparent digestibility of chide protein and phosphorus of Hainan black pigs in Group II increased significantly （P〈0.05）, which were increased by 10.08% and 11.85% respectively compared to the control group; the apparent digestibility of calcium was increased, but the difference was not signifieant （P〉0.05）. [Conclusion] It will not reduce the growth performance of Hainan blaek pig when the protein level of diet is reduced by 2% and Ihe lysine level is increased to 1.03%. It is recommended that the diet can be used in the production of llainan black pig.

关键词： Low prolein diets Lysine Hainan black pigs growth performances Feed digestibility

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