Pengaruh Komposisi Media Tanam Berupa Campuran Vertisol, Pasir Dan Arang Sekam Terhadap Sifat Fisik Tanah, Pertumbuhan Dan Hasil Lobak

Peters O. Bako , Moresi M. Airtur, Diana Y.L Serangmo, Max J. Kapa, Komang Kertiawan

Abstract

An experimental research was carried out on farmer's land in Batuplat Village, Alak
District, Kupang City and at the Soil Physics Laboratory, Faculty of Agriculture, Nusa Cendana
University. The aims of this study were: (1) to determine the effect of the treatment of the
composition of the planting medium in the form of a mixture of vertisol, sand and rice husk
charcoal on the physical properties of the soil, growth and yield of rapeseed; and (2) getting the
composition of the growing media that gives the best effect on soil physical properties, growth,
and radish yield. The study was designed in a single factor experiment using an environmental
design in the form of a completely randomized design (CRD). The treatment tested was the
composition of the planting medium in the form of a mixture of vertisol, sand and rice husk
charcoal, namely: 1 : 1 : 1 (P1); 1 : 1 : 2 (P2); 1 : 2 : 1 (P3); 2 : 1 : 1 (P4); 2 : 2 : 1 (P5) and 2 : 1 :
2 (P6). Each treatment was made in 3 replications so that in total there were 18 experimental units.
Parameters observed included: soil bulk density, soil porosity, plant height, number of leaves per
plant, and fresh weight of radish tubers. The results showed: (1) the composition of the growing
media had a very significant effect on the parameters of fill density and soil porosity, as well as
the height and number of leaves per plant at the age of 2 and 4 weeks after planting (MST), but
had no significant effect on the fresh weight of radish tubers per plant; (2) there was no treatment
of the composition of the planting medium in the form of a mixture of Vertisol, soil, and rice husk
charcoal which had the best effect on the physical properties of the soil, growth and yield of
rapeseed. Each treatment of the composition of the planting media that was tried was able to
change the physical condition of the Vertisols to be better and more conducive to plant growth and
development of radish tubers in the soil.