Effect of Nodule Bacteria from Several Leguminous Weeds on Nodulation and Growth of Peanut Plants Grown Following Paddy Rice

Previous studies showed that microbes from root washing of Mimosa pudica from dryland in Pringgabaya significantly increased growth and yield of mungbean plants. This study aimed to examine the effect of root nodule bacteria from several leguminous weeds on nodulation and growth of peanut plants grown following paddy rice. The experiment was conducted at the Experimental Farm of the Faculty of Agriculture, University of Mataram, located in Narmada, from September to November 2024. The experiment was arranged according to Split Plot Design with three blocks and two treatment factors, namely leguminous weed sources of nodule bacteria (L1: pinto peanut; L2: Mimosa pudica; L3: Crotalaria sp.) as the main plots, and root nodule bacteria (B0: without bacteria, B1: with root nodule bacteria) as the subplots. These root nodule bacterial isolates were applied by soaking the seeds before planting, and peanut plant samples were harvested at the pod formation phase. The results showed that application of root nodule bacteria from several weeds significantly increased shoot fresh weight (FW), total plant FW, nodule FW and root FW of peanut plants, but different leguminous species as sources of nodule bacteria only showed different effects on shoot FW, total plant FW, and nodule FW of peanut plants. There were also significant interaction effects on the first three measurement variables, in which peanut’s shoot FW and total plant FW were highest (167.36 and 171.80 g/clump) under the application of Crotalaria nodule bacteria, but peanut’s nodule FW was highest under the application of pinto peanut nodule bacteria.