Adaptation test on growth and biomass production of Brachiaria ruzisiensis mutants in lowland and upland agroecosystems
Yenny Nur Anggraeny1a, Pritha Kartika Sukmasari, Alif Shabira Putri , Risa Antari, Noor Hudhia Krishna, Mariyono, Dicky Pamungkas, Setiasih,Wahidin Teguh Sasongko, Farida Yuliant, Wardi, Sigit Puspito, Bambang Haryanto, Dyah Tuwi Ramsiati1, Wahyuni Indah Wulansari, Muchamad Chanafi, Angga Maulana Firmansyah

National Research and Innovation Agency, Research Center for Animal Husbandry
large ruminant agricultural instrument standardization agency
National Research and Innovation Agency, Research Center for Horticulture and Plantation
National Research and Innovation Agency, Research Center for Sustainable Development Systems and Life Cycle Assessment
5National Research and Innovation Agency, Research Center for food technology and process

Abstract

Abstract. Increasing the productivity of Forage Animal Feed can be done through the formation of new superior varieties of Forage Animal Feed. Mutation induction through the use of gamma rays has been widely used to increase plant diversity and productivity. The purpose of this study was to test the growth adaptation and biomass production of Brachiaria ruziziensis mutants through gamma irradiation technology in lowland and highland agro-ecosystems. Adaptation tests were carried out on two mutants of Brachiaria ruziziensis which had been irradiated at doses of 10 Gy (BR1) and 15 Gy (BR 2) and as a comparison, germplasm grass (K) Brachiaria ruziziensis was planted. The adaptation test was carried out in Beji Village, Junrejo District, Batu City and in Alas Tlogo Village, Lekok District, Pasuruan Regency. This study used a factorial randomized block design with treatment 1) agro-ecosystem types, namely lowland and highland and 3 grasses tested, namely K (control), BR 1 and BR 2. Parameters observed were plant height, number of tillers, number of leaves, leaf width and length of leaves, biomass production at 2 months of age. The number of tillers in the highlands was more (P=0.000) than in the lowlands- although the number of tillers is affected by the interaction of mutants and agroecosystems. Plant height in BR 1 and BR 2 was taller (P=0.000) than K- plants have been taller in the lowlands than the highlands (P=0.000). The number of leaves in the lowlands were more (P=0.000) than in the highlands- BR1 and BR2 produced plants with more leaves (P=0,016) than K. BR1 and BR2 are significantly wider (P = 0.000) and longer (P = 0.003) than K. Biomass production in the lowlands was 29,750 tons while in the highlands was 13.9 tons- BR1 produces higher biomass (23,7 ton) than BR2 (20,11 ton) and K (21,8 ton).

Keywords: Superior forage, productivity, Brachiaria ruzisiensis and mutants.

Topic: Grassland Science