Respons Pertumbuhan Dan Hasil Tanaman Sorgum (Sorgum Bicolor L.) Terhadap Aplikasi Biofertilizer Rhizobium spp. Dan Pupuk Kotoran Ayam Pada Tanah Pasiran

Listyanto, Daffa Ananda (2025) Respons Pertumbuhan Dan Hasil Tanaman Sorgum (Sorgum Bicolor L.) Terhadap Aplikasi Biofertilizer Rhizobium spp. Dan Pupuk Kotoran Ayam Pada Tanah Pasiran. Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

Sandy land is one of the marginal lands (low organic matter, low nutrients, low microorganisms, high porosity) that has the potential to be utilized for crop cultivation through good and proper management. This study aims to examine the growth and yield of sorghum plants on sandy land through the application of Rhizobium sp biofertilizer and organic chicken manure fertilizer. The experiment was designed using a completely randomized design (CRD) factorial with 2 factors. The first factor is Rhizobium sp consisting of control (without Rhizobium sp), Rhizobium sp from the root zone of rice, corn, edamame, soybeans, and peanuts. The second factor is the dose of chicken manure fertilizer consisting of 8 tons/ha, 10 tons/ha, and 12 tons/ha. The results showed that the application of Rhizobium sp was able to increase the growth of plant height (188.4 cm) and stem diameter (25 mm) and accelerate flowering (57 hst) in sorghum plants compared to without Rhizobium sp application (control). Rhizobium sp is able to stimulate the growth of sorghum plants through both direct and indirect mechanisms. Freeliving Rhizobium sp is able to produce the hormone IAA which can be utilized by plants to stimulate their growth. Furthermore, the application of Rhizobium sp from the rhizosphere of corn plants has a significant effect in increasing plant height (199.9 cm), stem diameter (28.2 mm), flowering age (56 days after planting), and grain weight per panicle (157.9 g) in sorghum plants compared to Rhizobium spp from the rhizosphere of rice plants

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