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Livestock Research for Rural Development, Volume 33, Number 6, June 2021
ISSN 0121-3784


In this issue of LRRD, we review the steps in the research to develop and use an in vitro rumen incubation system to measure methane production from feeding systems using tropical feed resources. This system facilitates identifiation of basal diets, and supplements, in terms of their potential to influence methane production. Practical steps to reduce methane production are the obligation of all researchers as their contribution to climate change mitigation. Of equal importance is that when methane is reduced the nutritive value of the diet is increased.

We hope that the information will serve as a guide and encouragement to researchers in tropical countries in planning and executing their research activities.



  1. The rumen in vitro incubation system as a tool for predicting the nutritive value of ruminant diets and the associated emissions of methane; T R Preston, R A Leng, Sangkhom Inthapanya and María E Gomez Z [EDITORIAL]

  2. The effect of nutmeg flesh (Myristica fragrans Houtt) extract on growth performance, internal organ and carcass of broiler chickens raised at high stocking density; Yusri Sapsuha, Edjeng Suprijatna, Sri Kismiati and Sugiharto Sugiharto

  3. Effect of the type of container and the storage environment on the germination of Tithonia diversifolia (Hemsl.) Gray seeds; Idalmis Rodríguez, C Padilla, Verena Torres, Magalis Herrera and Yolaine Medina (In spanish)

  4. Enhancing methane production of dairy cow manure by co-digestion with modified cassava flour waste water; Sutaryo Sutaryo, Retno Adiwinarti, Muchamad Abi Sudrajad, Tri Yulia Kurnia Sari, Laela Nur Khayati, Alastair James Ward and Agung Purnomoadi

  5. Fermented sugarcane bagasse with the fungus Pleurotus eryngii reduced in vitro methane production; Nguyen Thi Huyen, Nguyen Thi Tuyet Le and Bui Quang Tuan

  6. Effect of the harvesting method on propolis production by the local honeybee Apis mellifera intermissa in Algeria; H Guermah, S Hadjem and H Zemihi (In french)

  7. Phytoliths: Characteristics, applications in livestock activity and methods for their analysis; Jatnel Alonso Lazo and Maily López Díaz (In spanish)

  8. Evaluation of nutritive value of local browses from drylands of Kenya; F Kemboi, J O Ondiek, A M King’ori and P A Onjoro

  9. Propolis mixture production and foragers daily activity of stingless bee Tetragonula sp. in bamboo and box hives; Erwan, Suhardin, Syamsuhaidi, Dwi Kusuma Purnamasari, Muhammad Muhsinin and Agussalim

  10. Effects of rice bran and sesame seed cake mixtures on feed intake and weight gain of Begait sheep supplemented for grass hay; Kibrom Gebremedhin, Mengistu Urge and Zelalem Tesfay

  11. Morphological and mitochondrial genome characterization of indigenous Dong Khe pig in rural areas of Northeast Vietnam; Bui Thi Thom, Tran Van Phung, Cu Thi Thuy Nga, Duong Thi Khuyen, Dao Thi Hong Chiem and Nguyen Minh Duc

  12. Analysis of the impact of the use of multinutritional blocks in a dual-purpose production unit in the central zone of the state of Veracruz; R S Gudiño-Escandón, J A Díaz-Untoria, C O Retureta-Gonzalez, V E Vega-Murillo, V Torres-Cárdenas, C Padilla-Corrales and R O Martínez-Zubiaur (In spanish)