The effect of sulfur and Rhizobium sp application to the growth and nodulation of Mucuna bracteata

Abstract

Planting of legumes cover crop, Mucuna bracteata, aims to reduce erosion, increase organic matter, improve soil structure and increase nutrient N. Factors that influence N fixation are food sources, rainfall, sunlight, pH, presence of toxic and competitors. The pH value of the soil is related to the Sulfur element S (sulfur). The study was conducted with 4x4 factorial design with 3 replications. The first factor in the dosage of sulfur consists of S0 (0g), S1 (30g), S2 (60g), S3 (90g) per plant. The second factor is the dose of Rhizobium sp, I0 (0ml), I1 (0.3ml), I2 (0.6ml), I3 (0.9ml), every 1 ml contains 106 cells. Observations were length of tendrils, number of leaves, number of nodules and levels of N. The results of treatment S significantly affected the length of tendrils, number of leaves, number of root nodules, most in S3, 127.50 and soil pH. . Treatment I significantly affected the increase in the number of root nodules, in I3 it increased 86.93%. N levels of all treatments in the high category. The highest N level is 4.17% for S3I2 treatment (90g sulfur and 0.6ml Rhizobium sp).