Abstract
Sustainable forage production is needed to meet animal feed needs as the livestock industry increases. The purpose of this study is to evaluate the effect of liquid and solid carrier material on the effectiveness and infectivity of Bradyrhizobium sp. strain PZS_A08 on the growth of Indigofera zollingeriana (I. zollingeriana). The two carrier materials used were zeolite (solid) and molasses (liquid). This study used two carrier materials consisting of zeolite (solid) and molasses (liquid). The five treatments given were P0 (50% NPK), P1 (50% NPK+liquid biofertilizer), P2 (50% NPK+sterile liquid biofertilizer), P3 (50% NPK+solid biofertilizer), P4 (50 % NPK+sterile solid biofertilizer), P5 (100% NPK). Observations were made on the plant's height, number of leaves, number of nodules, upperparts and root wet biomass, root and upper parts dry biomass, root length, and microbial population). The use of liquid and solid carrier materials effectively affected the effectiveness and infectivity of Bradyrhizobium sp. strain PZS_A08 on I. zollingeriana. Inoculants Bradyrhizobium sp. strain PZS_A08 significantly increased plants' growth and reduced the use of 50% NPK fertilizer. Cold storage temperature (5ºC) effectively maintained Bradyrhizobium sp. strain PZS_A08 on liquid and solid carriers, while solid carriers showed better effectiveness at room temperature storage (30oC). Through this research, solid carriers such as zeolite are recommended as carriers for Bradyrhizobium sp. filter PZS_A08.
Highlights
Continuous forage production is needed to meet livestock industry needs (Duan et al 2019)
I. zollingeriana plant seeds were obtained from the Laboratory of Feed Science and Technology, Faculty of Animal Husbandry, Bogor Agricultural University
Application of Bradyrhizobium sp. strain PZS_A08 has been shown to increase plant growth and decrease NPK fertilizer by up to 50%, using zeolite and molasses
Summary
Continuous forage production is needed to meet livestock industry needs (Duan et al 2019). Fluctuating quantity and quality of feed, especially during the dry season (Tinsley et al 2019), decrease livestock productivity (Tabacco et al 2018). It impacts the high mortality rate and the low livestock growth rate. Forage feed, a combination of grass and legume, is needed to complement the nutrients required by livestock (Duan et al 2019; Koten et al 2014). I. Zollingeriana feed plants are potential feed crops as supplementary feed ingredients to improve livestock’s nutritional status on cattle, goats, and poultry (Devendra and Liang 2012; Faradillah et al 2015).
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