Plant Growth Promoting Rhizocbacteria (PGPR) II

PGPR is a one of the bio-fertilizer. Compared to chemical fertilizer, it is more environmental friendly and has long-term effect.

Disadvantages of Chemical Fertilizer/Pesticides 

(Example: NPK 15:15:15)

Fertilizer

 1. Land will turn into infertile in long term.

2. Reduce quality and quantity of crops.

3. Increase pH of land and cause some minerals are bounded by soil particles and not available for plant.

4. Accelerate the process of soil erosion and compaction. When the soil is compacted, roots of plants are hard to grow.

5. Applied too much, plant will susceptible to pest and disease.

6. More easy to be leached out especially urea fertilizer .

Pesticides

1. Built up resistance of pest to pesticides

2. Bacteria disease cannot be treated by using pesticides/fungicides

3. Easy to be leached out and caused pollution of water.

Advantages of Bio-fertilizer (PGPR)

1. Environmental friendly 

2. Help to promote the growth of root - absorb more soil nutrients and water

3. Can stay in the soil for long-term period - Microorganism

4. Help to fix nitrogen in soil

5. Help to increase the available of phosphate and potassium

6. Help to protect plant from pathogen disease like powdery mildew.

7. Help to kill larvae of pest

etc.

PGPR fertilizer that used in our farm:

Bacillus mycoides 

It was common soil microorganism. It can help to fix nitrogen in soil therefore we can replace nitrogen fertilizer with it. Bacillus mycoides can used to control the growth of pathogenic bacteria and fungus.  Diseases that caused by pathogenic bacteria and fungus like powdery mildew, wilting disease and others. Therefore, we can use it to replace pesticide or fungicide to control pathogen disease. 

Extra information:

Bacillus mycoides strain SU-23 is proved can be used to control damping off disease on cucumber seedling caused by Pythium mamillatum (Paul et al., 1995).

Reference

Paul, B., Charles, R. and Bhatnagar, t. 1995. Biological control of Pythium mamillatum causing damping-off of cucumber seedlings by a soil bacterium, Bacillus mycoides, Microbiological Research, Vol150, 1, 71–75.

Bacillus thuringiensis

Bacillus thuringiensis

It is Gram positive bacteria and normally used as bio-pesticides. Commonly used to against leaf-feeding caterpillar and also affect to larvae of  beetles and mosquitoes.  

Phosphate-Solubilizing Bacteria Inoculant No.1

Phosphate-Solubilizing Bacteria

Phosphate-solubilizing microorganisms can help to increase the availability of phosphorus in soil and promote plant growth and increase the plant yield (Ahemad et al., 2009). The phosphate-solubilizing bacteria can produce organic acid which can help to solubilize insoluble phosphate in the soil. Examples of bacteria which can solubilize phosphate are Erwinia and Bacillus.

(copy from Ooi, 2014)

Reference

Ahemad, M., Zaidi, A., Khan, M.S. and Oves, M. 2009. Biological Importance of Phosphorus and Phosphate Solubilizing Microbes – An Overview. Phosphate Solubilizing Microbes for Crop Improvement, ed M.S. Khan and A. Zaidi, pp. 1-14. New York: Nova Science Publishers, Inc.

Ooi, Y.S. 2014. Isolation and Characterization of Plant Growth Promoting Rhizobacteria and Its Effect on Quality of Turfgrass, Degree Thesis, University Putra Malaysia.

Angelia