Growth responses to fertilizer applications and timing

1.Background

In 2011, LPFL applied 4 kinds of fertilizers (DAP, SSP, Fertibor and KCL) to Eucalyptus and 3 kinds of fertilizers to Acacia (SSP, Fertibor and KCL) in first year. The time for applying fertilizers is very important for tree growth and operation should not be delayed (schedule is below). The result, however, shows that some plantations didn’t work out as scheduled because of lack of labours and difficult to access to the plantation (flood). To avoid these situations, LPFL decided to change the application method in 2012.

Operation schedule in 2011

Activities

Apr

May

Jun

Jul

Aug

Sep

Oct

Site preparation

 

 

 

 

 

 

 

Planting

 

 

 

 

 

 

 

Fertilizing (DAP, SSP)

 

 

 

 

 

 

 

Fertilizing(Fertibor, KCL)

 

 

 

 

 

   
                 
           
            Heavy rain    Dry Season

 2. New method in 2012

The time of SSP application was changed to pre-planting to avoid lack of labor and fertibor and KCL were replaced by Blend9 (blended fertibor and KCL) to reduce the frequency of application.

Operation schedule in 2012

Activities

Apr

May

Jun

Jul

Aug

Sep

Oct

Site preparation

 

 

 

 

 

 

 

Fertilizing (SSP)

 

 

 

 

 

 

 

Planting

 

 

 

 

 

 

 

Fertilizing (DAP)

 

 

 

 

 

 

 

Fertilizing(Blend9)

 

 

 

 

 

   
           
           Heavy rain    Dry Season

                                                                                                                                   

3.Result

Most of plantations could apply fertilizers following the schedule. Planting and weeding operation were also implemented on time. Comparing the result of 2012 to the result of 2011, growth rate has improved.

Result of growth rate

 

All species

Each species

Mean height (m)

Weighted average height(m)

Eucalyptus Spp

Acacia Spp

P11

1.0

0.9

0.6-0.9

0.9

P12

1.4

1.2

1.1-1.8

1.6

 

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