Maintenance of Oil Palm seedlings at the Main Nursery stage

        One of the advantages of double stage breeding is a more controlled culling, this makes the effectiveness of seedlings that reach the field indeed normal seedlings and according to criteria. This saves costs that must be incurred for maintenance because trees that do not meet the criteria are immediately discarded or destroyed. Other maintenance activities are also more to do. The maintenance of oil palm seeds at the main nursery stage are:

Spray fertilizers and pests diseases

        Spraying is an activity to provide active ingredients to plants by spraying depending on the purpose of fertilizers, pesticides, fungicides and herbicides. Spraying fertilizers and pests using Bayfolan compound leaf fertilizer containing nutrients N, P, and K mixed with fungicides. The mixture used is the same, namely 2 cc / L of water with a dose of 12000 mL / 400 principal or 30 ml / tree.


Fertilization

    Fertilization is an activity to meet the nutrient needs of agricultural plants so that they produce well. The material used is called fertilizer. Based on its nutrient content, fertilizers can be divided into single fertilizers and compound fertilizers. Single fertilizers contain only one nutrient such as Nitrogen, Phosphate or potassium while artificial fertilizers that contain more than one nutrient are called compound fertilizers such as NP fertilizers, NPK fertilizers. The principle of fertilization is known as 4T, which is right on target, right on dose and right way.

Consolidation

    Consolidation is an activity to meet the soil in polybags. Fulfillment is done so that the roots are not directly exposed to sunlight as well as avoid ant pests nesting around palm trees. Reducing soil density in polybags can be caused by rainwater, raised soil during manual weeding and so on. 

Weeding Manual

    Weeding Manual is an activity to remove or remove weeds contained in the main nursery polybag. Manual weeding is also carried out in the pre-nursery stage until the plants are planted in the field until the age of 1 year. This is because palm trees are still very vulnerable to herbicide active ingredients. Retraction is carried out manually by hand and regulated rotation. In this activity nursery rotation is carried out once a month.


Culling in the main nursery

        One of the advantages of double stage breeding is a more controlled culling, this makes the effectiveness of seedlings that reach the field indeed normal seedlings and according to criteria. This saves costs that must be incurred for maintenance because trees that do not meet the criteria are immediately discarded or destroyed.  Procedurally, the selection process is carried out 4 times during the main nursery stage, namely in the 5th, 6th, ninth months and before planting into the field. The main criteria that must be selected in the main nursery include:

a.       Seedlings are erect, midrib and leaves erect and less open.

b.      Narrow internodes, the distance between the leaves is tight and the seedlings become short.

c. Stunted growth, stunted growth should not be considered yet but needs to be given more intensive attention.

d. Etiolation (growing high) seedlings appear to grow higher due to competition for sunlight. Seedlings need to be spaced out

e.       Sparse leaflets (wide internode)

f.        Grass like leaf

g.      Leaf rolling

h.      Curly leaves

i.       Abnormal shoots

j.        The leaves do not open, the tips of the children are sticky to each other

k.      Dwarf seedlings. Dwarf seedlings appear short, usually followed by a dense arrangement of                 leaflets.

l.       Antracnose, seedlings attacked by antacnose fungi. Leaves appear to dry from the tip of the                     midrib.

m.    Plasmolysis, due to excessive application of fertilizer, does not need to be thought of provide                 sufficient watering.

n.      Culvularia leaf spot

o.      Chimera

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