KARAKTERISTIK PERTUMBUHAN JARAK PAGAR PADA MEDIA TANAH BEKAS PERTAMBANGAN BAUKSIT UNTUK PENGEMBANGAN DESAIN PEMBELAJARAN BIOLOGI
ABSTRACT: A field
research has been conducted
to observe the growth
characteristics of Physic Nut
(Jatropha curcas L.)
cultivated on bauxite
mined soil in
the Biology Natural Laboratory, Teacher
Training and Education
Faculty of the
University of Riau, Pekanbaru. Parameters
observed every single
week include plant
height, stem diameter, and
number of leaves,
whereas at the
end of the testing carried
out measurements of leaf
area, canopy dry weight,
and root volume. The pH
of the soil was analyzed at the beginning and at
the end of the test, while the temperature andhumidity
were analyzed every
single week. Growth
characteristics were observedduring the 9-week
period showed that the average height
of Physic Nut plants
reach42,9 cm and the relative growth rate (RGR) 3,40
cm/week. A mean diameter of
1,26cm rod with
RGR 0.33 cm/week.
The mean number of leaves around
9,78 cm22,20 RGR strands with
strands/week. The total
leaf area of
Physic Nut directly proportional to the volume of the dry
weight of roots and
canopy. The results of nonexperimental studies
can be utilized
to improve the
quality of teaching
biology at Senior High School in the form of
Syllabus development, Lesson
Plan (LP), Student Assignment Sheet
(SAS) I and II,
and Assessment Sheet.
The review of the product design Syllabus,
LP, SAS I and II,
and Assessment Sheet
shows that all
the draft classified Very Good,
except for the Syllabus which was considered Good. In order to find out the
plant productivity in bauxite mined soil, the
observation period in
this study can be
extended to the generative
phase. Meanwhile, to ensure the quality
of biology learning design
products, the testing
steps still need to be
followed up to the stage of Implementation and
Evaluation.
Keywords: Bauxite
Mined Soil, Vegetative
Growth, Jatropha curcas
L., Biology Learning Design,
Physic Nut
Penulis: Firdaus L.N., Nursal
dan Sulistiono
Kode Jurnal: jpbiologidd140091
