peer reviewed

peer reviewed

We are pleased to present the Proceedings of the 9th International Scientific Conference “Rural Development 2019: Research and Innovation for Bioeconomy”. The Conference took place in Academia, Kaunas district, Lithuania at the Vytautas Magnus University, 26–28 September, 2019. The 9th International Scientific Conference “Rural Development 2019” was the most effective bi-annual platform for the interdisciplinary scientific discussions and the presentations of new ideas for Sustainable Rural Development in the context of research and innovation for Bioeconomy. The Conference brings together scientists, practitioners, policy makers and actors from private sector around the world to share their experience helping countries to provide their citizens with a more competitive economy, more and better jobs and a better quality of life. The topic of the Conference has allowed for the exploration of different aspects of four main areas: Agro-innovations and Food Technologies Biosystems Engineering and Environment Integrity Multifunctional Approach for Sustainable Use of Bio-Resources Social Innovations for Rural Development The topic “Research and Innovation for Bioeconomy” chosen for the 9th International Scientific Conference sparked strong interest among the professional and scientific community and elicited great response to the call for papers. The Proceedings include 86 peer-reviewed papers and contributions from 283 authors. In total we received 106 submissions for the Conference. A selection of papers are available in this volume. The majority of the contributed papers are included as are selected papers from the discussions sessions.and have been peer reviewed by two experts. We want to thank Vytautas Magnus University, Lithuanian Ministry of Agriculture, and Research Council of Lithuania for the generous financial support that made the Conference possible.   2019, December 28

peer reviewed | Lack of appropriate animal waste management methods in many smallholder farms in the tropics often leads to environmental problems, especially in locations with high population density such as urban and peri-urban areas. On farms integrating pig production to fish farming, manure can be turned into a valuable feed source of high quality protein for fish through housefly larvae and contribute to intensify fish production and reduce cost of fish feed. Three experiments were carried to optimize operating conditions for maggot production on animal wastes and industrial byproducts found in Kinshasa, the capital city of the Democratic Republic of Congo (DRC). The comparisons were: (1) production on pure substrates (manure or brewer’s grains) or mixtures with lysine or blood; (2) exposure time to flies for the insemination of the substrates: and (3) dynamics of larvae production. Mixing brewers’ grains with Lysine or manure and/or blood more than doubled the amount of larvae that were harvested. Brewers’ grains are a good source of energy, but are probably deficient in essential amino acids to support the growth of maggots. It also appears that only the first days of laying eggs are important since no difference was observed between temporary and permanent exposure of the substrates to houseflies. The peak of larvae production was reached 6 days after exposure. The addition of cow blood in increasing doses to a mixture of brewers’ grains and manure linearly increased the production of maggots.

peer reviewed | La productivité des chevreaux hybrides F1 en élevage extensif à Lubumbashi a été estimée à partir des taux de mortalité et des performances de croissance, en comparaison avec celle des chevreaux Boers «purs» et des chevreaux locaux. Le taux de mortalité pré-sevrage (0-90 jours) observé pour les chevreaux locaux, Boers et hybrides était respectivement de 14,65 % (17/116) (voir partie 2: analyse de la croissance des chevreaux locaux), 16,1 % (10/62) et 8,98 % (15/167) dans l’ensemble pour les deux sexes. Les performances de croissance des Boers étaient de 2,40 ±0,31 kg à la naissance; 6,80±0,84 kg à 1 mois; 14,2±1,59 kg à 3 mois; 17,9±1,15 kg à 6 mois et, 24,7±1,39 kg à 9 mois. La variance de poids moyen était plus élevée à 3 mois, ensuite à 9 mois. Les gains moyens quotidiens étaient respectivement de 143 g/j (0-1 mois); 123 g/j (1-3 mois); 41,1 g/j (3-6 mois) et 75,5 g/j (6-9 mois). Les performances de croissance des chevreaux hybrides étaient de 2,18 ± 0,46 kg à la naissance; 5,10±1,22 kg à 1 mois; 9,17±1,94 kg à 3 mois; 14,2±2,64 kg à 6 mois et, 21,6±2,59 kg à 9 mois. La variance de poids moyen était plus élevée à 3 mois, ensuite à 9 mois. Les gains moyens quotidiens étaient respectivement de 94,1 g/j (0-1 mois); 65,7 g/j (1-3 mois); 56,5 g/j (3-6 mois); 83,9 g/j (6-9 mois). Le gain moyen quotidien était plus élevé en saison sèche avant sevrage; après le sevrage les chevreaux nés en saison de pluies ont eu un gain moyen quotidien plus élevé que ceux nés en saison sèche. Ainsi, l’introduction de sang Boer doit s’accompagner préalablement d’une amélioration des conditions d’élevage.

peer reviewed | The feeding of ruminants in the Democratic Republic of Congo is based on the use of natural vegetation. This vegetation is characterised by grasses and rarely legumes. In addition to this, the lack of legumes in the southern part of the country means that the dry season becomes longer (over 6 months). This leads farmers with the financial means, to use commercial foods, most of which are imported. Grasses which form the basis of forage remain as straws in the dry season. They have a digestibility of less than 45%, and are very low in nitrogen and phosphorus, as well as other minerals, which further limits their feed intake (Chenost and Kayouli 1997; Jarrige 1987). The use of locally available protein banks to supplement poor foods is therefore essential. In the same region, soils are increasingly contaminated with heavy metals from mining activities. The choice of sustainable and high protein plant species should be dictated by their adaptation to environmental conditions, including high levels of heavy metals in soil. They must also be adapted to the long dry season and provide fodder throughout the year. Among the species encountered, Adenodolichos rhomboideus is the most resistant to drought and is widespread in the region (INEAC 1954). It grows on normal soil or that contaminated by heavy metals (Faucon 2009; Meerts 2008 and Tshibangu et al 2014c). Two other species, Leucaena leucocephala and Stylosanthes guianensis are durable and are used in ruminant diets, but are neither widespread nor adapted to the contaminated soil Tshibangu et al 2014ab. The objective of this study was to compare the use of A. rhomboideus, L. leucocephala and S. guianensis forage as a complement to grass hay on the growth of local goats at Lubumbashi.

peer reviewed | In Northern Vietnam, the livestock production sector has been strongly encouraged to develop by the government for many years as an important livelihood strategy to alleviate household poverty. Over the last few decades, it has been developed quickly, but remained unsustainable. This study aims to identify the dynamics of livestock production systems during the economic transformation period and their current constraints as the basic for setting up sustainable development policies. A survey, which is based on participatory and retrospective approaches, was conducted at 38 households in two communes of Hai Duong province in 2010. The results indicated a significant evolution of livestock production systems from a traditional small-scale production system into a specialized intensive one due to the land law and the rice land conversion program in 1990s and the industrialization and urbanization process in 2000s. The intensification of livestock production system, which is accompanied by the increasing dependence on imported inputs and the limited knowledge and skills in adequate techniques and disease management, poses a huge difficulty to producers in developing their livestock production systems. Therefore, the priority of development policies should be given to the promotion of the local resource utilisation as feed for animals and to the improvement of farmers’ ability to manage their production through not only government supports but also participation of social organisations and farmers.

Notice a Reprendre pas de Clé UT au 5 Mai 2017 | 85 Algerian white population rabbits were used to study the effect on the growth performances of fig-tree (Ficus carica, 12.8%, 30.6% and 15 % DM respectively of CP, NDF and ADL) leaves incorporated in pelleted diets in association with Sulla hay (Hedysarum flexuosum). At weaning (35 d, 674±390 g), the rabbits were divided in three groups (individually caged) and received ad libitum one of the three diets during six weeks. The control (T, n=25), diet was classic diet and content barley, dehydrated alfalfa, soya bean meal and wheat bran. The experimental diets were formulated to contain 25% of Sulla hay and either 15% (F1, n =30) or 30% (F2, n =30) dried fig tree leaves in total replacement of dehydrated alfalfa and barley. The diet F1 contained also wheat bran to contain only raw materials available locally. During the whole period (35-77 d), feed intake was at the same level with the three diets (121.3 ± 6.5 g/d), as well as growth (35.3 ± 2.4g/d) and feed conversion ratio (3.37 ± 0.21). According, fig-tree leaves (Ficus carica) could be incorporated in pellet diet for fattening rabbits associated with Sulla ( Hedysarum flexuosum), in total replacement of barley, dehydrated alfalfa and eventually soya bean meal to contain only locally available raw materials. They permitted substantial performances as those of control diet without negative effect on health and the zootechnic performances. | 85 lapins de population locale blanche ont été utilisés pour étudier l’effet sur les performances de croissance de l’incorporation, dans l’aliment granulé, de feuilles de Figuier (Ficus carica ; 12,8% ; 30,6% et 15 % MS respectivement de PB, NDF et ADL) associées au foin de Sulla (Hedysarum flexuosum). Au sevrage (35 j, 674±390 g), les lapins ont été répartis en trois lots homogènes, logés individuellement et ont reçu ad libitum un des trois aliments durant 6 semaines. Le témoin (T, n=25), un aliment classique, contenait de la luzerne déshydratée, du son de blé, de l’orge et du tourteau de soja. Les deux aliments expérimentaux contenaient 25% de foin de Sulla et soit 15% (F1, n =30) soit 30% (F2, n =30) de feuilles séchées de Figuier (FF), en remplacement total de la luzerne et de l’orge. L’aliment F1, équilibré avec du son de blé, ne contenait que des matières premières disponibles localement.Durant la période globale (35-77 j), la consommation a été similaire entre les trois aliments (121 ± 6,5g/j), ainsi que la vitesse de croissance (35,3 ± 2,4g/j) et l'indice de consommation de l’aliment (3,37 ± 0,21). Ainsi, les feuilles de Figuier (Ficus carica) peuvent être incorporées dans l’aliment granulé pour lapins en engraissement associées à du foin de Sulla (Hedysarum flexuosum), en remplacement de l’orge, de la luzerne déshydratée et éventuellement du tourteau de soja pour ne contenir que des matières premières disponibles localement. Elles ont permis des performances appréciables au même niveau que celles de l’aliment témoin sans effets négatifs sur la santé et les performances zootechniques.

The desire to reduce food insecurity and poverty in developing countries is the essential justification to take into consideration rural agro-pastoral activities. Thus this paper proposes a typological study of sedentary farmers in the semi-arid zone of Cameroon which was conducted between January and May 2014. 400 sedentary farmers were surveyed in four cities including Mindif, Doukoula, Koza and Maroua.Descriptive statistics helped to highlight that 100% of sedentary farmers practice agriculture. The fattening of ruminants is an activity that increasingly recruits sedentary farmers. This applies to Mindif where virtually all farmers practice sedentary fattening of ruminants. The factor analysis revealed two main components of variables characterizing the sedentaryfarmers. The extensive sedentary farming group is made up of 66% of producers in the area. The extensive sedentary farming group is made up of 66% of producers in the area. In the group of semi-intensive sedentary farmers, producers are increasingly farming a real business. This group could be a base for the development of animal production of second generation. | Pour réduire l’insécurité alimentaire et la pauvreté dans les pays en voie de développement une analyse des activités agropastorales en milieu rural est nécessaire. La typologie est à la base de cette analyse. Ainsi une étude typologique des élevages sédentaires en zone semi-aride du Cameroun a été menée entre janvier et mai 2014. Pour cela, 400 éleveurs sédentaires ont été enquêtés dans 4 communes dont celles de Mindif, Doukoula, Koza et la communauté de Maroua.Les statistiques descriptives ont montré que 100% des éleveurs sédentaires pratiquent l’agriculture. L’engraissement des ruminants est une activité qui recrute de plus en plus les éleveurs sédentaires. C’est le cas à Mindif où la quasi-totalité des éleveurs sédentaires pratique l’embouche des ruminants. L’analyse factorielle fait ressortir deux composantes principales des variables caractérisant les éleveurs étudiés. La classification two-step a été utilisée à et effet. Le groupe des élevages sédentaires extensifs englobe 66% des producteurs de la zone. Dans le groupe des élevages sédentaires semi-intensifs les producteurs font de plus en plus de l’élevage unvéritable business. Ce groupe pourrait constituer un socle pour le développement des productions animales de deuxième génération.

International audience | A silvopastoral grazing system (SP) was compared with confinement (CF) to determine the growth and general performance of weaned Pelibuey lambs under experimental conditions. Animals were from the Experiment Station “Indio Hatuey” flock of Matanzas, Cuba. The trial began with weaning in March and April at 4 months after lambing, with the lambs weighing around 13 kg, and lasted for 125 days. After being drenched with Levamisol, 25 lambs were grown on the SP with 18 to 21 lambs/ha, and 25 lambs were grown in CF. A rustic shed was used for CF with 1.5 to 1.8 m2 per animal. The CF lambs were fed cut and carried chopped forage (60% Pennisetum purpureum, 40% Morus alba), and dehydrated citrus pulp at 0.8 to 1.0 kg/lamb per day was offered as supplement in both treatments. The nutritive value of the woody forage species established in both systems was determined with the French expression system. Data were analyzed by Proc Mixed procedure of SAS. For the whole experimental period differences (P< 0.001) were obtained for average daily gain and incidence of gastrointestinal parasitism, mainly from Haemonchus contortus (2117 vs. 144 EPG of faeces) for SP and CF feeding systems, respectively. Lambs from CF (88.5 vs. 48.2 g/d) and males (77.8 vs. 58.9 g/d) exceeded SP and females in daily weight gains. Morbidity rate was explicitly higher in SP, and consequently, the survival level was better under CF experimental conditions (8% mortality in SP vs. 0% in CF). Advantages of the CF feeding system were mainly related to the reduced helminthiasis, which influences feed intake and efficiency, morbidity, growth rate, and survival rate as well. Under the particular conditions of this experiment, these results suggest that CF of lambs, adopting integrative approach with rational use of natural and local resources, can be a good alternative for improving the growth and welfare of growing lambs in the tropics.