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Volume 4 Issue 1
 
Volume & Issue: Volume 4 Issue 1

Effect of Azotobacter Sp and Endophytic Bacteria Indigenous to Tea Plant on Drought Season
  Volume 4,Issue 1
 

Author :

Eko Pranoto, Restu Wulansaria, Mieke Rochimi Setiawati

 

Abstract :

Productivity of tea in Indonesia has decreased caused by several factors, such as land conversion at 2,10% per year, the lack of maintenance plant, especially fertilization. Type of fertilizer which has the potential to reduce 20-30% of anorganic fertilizer use is a biofertilizers. The aimed of the research was to test Azotobacter sp and endophytic bacteria from tea planting area (indigenous) and exogenous as biofertilizers on tea productive plants, GMB 7 clones and two years after pruning. The research was conducted in June 2013-September 2103. This research was carried out at Gambung experimental station of Research Institute for Tea and Cinchona (RITC), Block A7 with type of soil was Andisol, altitude of 1.283 m above sea level and slope 10%. Endophytic bacteria was applied to leaves as a biofertilizer with each dose of 2 liters/ha/application with a population of 2,176 x 1011 cfu/ml and Azotobacter sp applied to each dose of 2 liters/ha/application with a population of 2,144 x 1011 cfu/ml on the ground. Randomized block design was used in this study with nine treatments and three replications. Microorganisms that used i.e Acinetobacter sp and Azotobacter sp (AK-II) as exogenous and endophtic bacteria (DtG7-5) and Azotobacter sp (RTG- 1) as an indigenous. The variables analyzed were tea productivity and N absorption. The results showed that the application of Azotobacter sp and endophytic bacteria both indigenous and exogenous fluctuated to the tea productivity. Application of these microorganisms could be increase the tea productivity on water deficit month (rainfall <147 mm / month) by the average percentage 6-51% higher than control (anorganic fertilizer only). The combination of indigenous Azotobacter sp with 75% dose of N anorganic fertilizer resulted the highest increase in N absorption by 38.11%. These microorganisms have a potential as Nitrogen Fixing Bacteria on tea plant.

 

Keywords :

Azotobacter sp, endophytic bacteria, exogenous, indigenous, tea plant

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