RESPON PEMBERIAN BEBERAPA DOSIS PUPUK FOSFOR TERHADAP PERTUMBUHAN SEMAI AKASIA (Acacia mangium Willd.) DAN KETERSEDIAAN FOSFORDI TANAH
Abstract: Acacia mangium
Willd. classified as plants that require nutrients are complete and available
or Nutrient demanding crop, althought for grow and evolve requires a lot of
nutrients that one of them is the phosphorus element. Phosphorusis needed
absorption of nutrientsb by increasing the number of nodules on the roots so as
to increase plant growth. The fertilization is o.0ne way that can be done to
fulfill the availability of soil nutrients that plants need. The purpose of
this research is to determine the effect of phosphorus fertilizer application
on acacia seedlings in topsoil medium, determine the best dose to the growth of
seedlings of acacia and check the availability of phosphorus in the soil at
this seedling. This research uses a completely randomize design method which
consist of 4 treatments and 10 replications. T0 = without phosphorus
fertilizer; T1 = 20 g/polybag ; T2= 25 g/polybag ; T3 = 30 g/polybag ;.The
resultsof this research indicates thatthe phosphorus fertilizer with 25 g /
polybag dose on top soil medium is the best treatment in the parameter of
observations, the high increasing (9.36 cm), the diameter increasing (1.19
mm)for seedling Acacia mangium Willd. in topsoil medium. Giving of phosphorus fertilizer can increase soil pH
(4.56), P-bray (527.66 mg / kg) and P-total (7000.1 mg / kg) the availability
increasing of phosphorus in the soil for growth seedlings Acacia mangium Willd.
Penulis: Nur Faizin, M.
Mardhiansyah, Defri Yoza
Kode Jurnal: jppertaniandd150415