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Maira, Lusi
Jurusan Tanah Fakultas Pertanian Universitas Andalas
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EFFECT OF L-TRP ON PERFORMANCE OF IAA PRODUCING RHIZOBACTERIA ON GROWTH OF SWEETPOTATO (IPOMOEA BATATAS L.) Lusi Maira
Jurnal Solum Vol 1, No 1 (2004): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.996 KB) | DOI: 10.25077/js.1.1.26-36.2004

Abstract

Penelitian tentang penambahan L-Triptophan (TRP) pada rhizobakteri penghasil IAA terhadap tanaman ubi jalar yang merupakan percobaan pot bertujuan untuk melihat pengaruh dari L-TRP dan inokulasi isolat rhizobakteri pada pertumbuhan dan hasil ubi jalar, populasi bakteri dan jamur tanah serta kandungan nutrien pada tanah pasir bekas galian tambang timah di Malaysia. Penelitian ini merupakan percobaan pot yang disusun secara Acak lengkap (RAL) yang menggunakan tiga isolat rhizobakteri penghasil IAA yang juga berasal dari perakaran ubi jalar. Dari penelitian ini didapati bahwa isolat rhizobakteri SPR 66 mampu meningkatkan berat kering bahagian atas, kandungan klorofil dan jumlah luas daun, sedangkan isolat SPR 100 mempengaruhi berat kering dan volume akar, pembentukan ubi, kandungan nutrien tanaman dan nutrien tanah. Pemberian L-TRP kepada semua isolat terpilih cendrung meningkatkan pembesaran dan hasil tanaman ubi jalar. Peningkatan ini berkaitan dengan peningkatan keadaan kimia dan aktivitas mikroorganisme di dalam tanah.
APLIKASI RHIZOBAKTERI PEMACU TUMBUH (RPT) DARI AKAR TITONIA (Tithonia diversifolia) TERHADAP PERTUMBUHAN STEK MELATI (Jasminum officinale) PADA ULTISOL Agustian Agustian; Anisah Permata Sari; Lusi Maira
Jurnal Solum Vol 15, No 2 (2018): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.175 KB) | DOI: 10.25077/jsolum.15.2.75-82.2018

Abstract

Jasmine plant is a horticultural crop that has promising prospect to be developed in trading. The development of jasmine cultivation is determined by the quality of seedling that can be produced rapidly for planting in the field. The purpose of this research is to study the effect of application of Plant growth-promoting rhizobacteria (PGPR) from titonia root (Tithonia diversifolia) in increasing the growth of jasmine cuttings (Jasminum officinale). This experiment used Completely Randomized Design (RAL) which consists of 7 treatments with 5 replications. The treatments were: A (control), B (Growtone), C (Growtone + 1 ml PGPR), D (Growtone + 2 ml PGPR), E (Growtone + 4 ml PGPR) , F (Growtone + 6 ml PGPR) and G (Growtone + 8 ml PGPR). Data obtained were analyzed statistically with F test at 5% level. The results showed that the application of PGPR can increase the growth of jasmine cuttings. However, the increase in PGPR dose did not have a significant effect on the increase of leaf number, branch number and height of jasmine cuttings. The highest number of leaves, branch and plant height at two months seedling age were found in treatment (C) 1 ml PGPR with 48.60 leaves, 5.80 branch and 22.90 cm plant height that significantly different from other treatments,. Treatment (D) 2 ml PGPR application increased the population of P solubilizing bacteria in rhizosphere from 2.59x104 cfu/g of soil at control to 5.05x105 cfu/g soil and fixing bacteria N (Azospirillium) 3x104 cfu/g soil to 1.41x105 cfu/g soil and Azotobacter to 1.2x 103 cfu/g soil.Key words : Jasmine, PGPR, cuttings, Ultisol
Co-Authors Agustian Agustian Anisah Permata Sari