MODEL BERA DALAM SISTEM AGROFORESTRI

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ABSTRACT: The  development  of  tree-based  agroforestry  model  gives  consequences  to  the  space utilization  dominated  by  trees.  Farmers  take  action  on  this  condition  by  conniving  the  fallow  land. This  research  was  aimed  to  know  the  fallow  land  model,  find  the  key  parameters  of  fallow  land model, and formulating the management of fallow land.
The  spatial  model  of  agroforestry  used  in  this  research  were  trees  along  border,  alley cropping, alternate rows and mixer. The actual data obtained were tree height, tree diameter, crown diameter,  land  width,  and  light  intensity;  the  calculated  data  were  land  extent,  the  percentage  of crown cover and crown density. The analysis used to determining the percentage of crown cover to calculate the affective arable land area was zone system. Zonation system maked for four zone : 1) zone 1 interval 0-1 m ; 2) zone 2 interval 1-2 m; zone 3 interval 2-3 m; zone 4 interval 3-4m.
The  fallow  land  model  was  classified  into  three  models,  which  were  light  fallow,  medium, and heavy; by using some determining factors such as land width, crown density, light intensity, and farmer’s  culture.  Light  fallow  has  62%  of  effective  arable  land  from  land  area  (zone  1:  the percentage  of  land  cover  is  >16%;  zone  2  14%;  zone  3:  >7%  and  zone  4  >15%).  Medium  fallow land model has 37% of effective arable land ≤% of arable land ≤ 62% of effective arable land (zone 1: 16% of land cover ≤land area≤26%, zone 2: 14% of land cover ≤land area≤24%; zone 3: 7% of land  cover  ≤land  area≤11%;  zone  4:  1%  of  land  cover  ≤land  area≤2%).  Heavy  fallow  land  model has 37% of effective arable land from land area (zone 1: the percentage of land cover is <26%; zone 2  <24%; zone 3 11%; zone 4 <2%). The strategy of silviculture is given priority to the decreasing of crown density to increase the availability of light in order to support the culture of crops to be more optimal.
Key  words:  agroforestry,  fallow  land,  silviculture,  land  cover,  resource  sharing,  crown dynamic
Penulis: PRIYONO SURYANT, WB.ARYONO dan M.SAMBAS SABARNURDIN
Kode Jurnal: jpkehutanandd060040

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Jp Kehutanan dd 2006