EFISIENSI SERAPAN NITROGEN TIGA VARIETAS KEDELAI DENGAN PEMUPUKAN NITROGEN DAN PENAMBAHAN RHIZOBIUM PADA TANAH DENGAN STATUS HARA N RENDAH
Abstract: The use of chemical
nitrogen fertilizer tends to be high on soils with low nitrogen nutrient
status, it can affect the balance of the global N cycle, contamination of
ground water and the increasing N2O (nitric monoxide is one of the greenhouse
gases). The objective of this research to compare the effect of nitrogen fertilization
and application of Rhizobium on nitrogen uptake efficiency, growth and yield of
three varieties of soybeans In Soil With Nutritrional Status Low Nitrogen. The
research was conducted at the practice field Agricultural Extention Collage
Medan, Deli Serdang North Sumatra Province in August-December, 2014. The method
used is split-slip plot design with the main plot Rhizobium application and
without Rhizobium, subplot is the varieties used are Burangrang, Tanggamus and
Wilis. Sub-sub plot is the standard of N fertilization, that is: control, urea
50 kg / ha, 100 kg / ha and 150 kg / ha. Variable observations include:
nitrogen absorption, plant dry weight, nodule and production. The results
showed that the application of Rhizobium on the variety Wilis provide a
significant response to the increased absorption of nitrogen, whereas the the
varieties Burangrang and Tanggamus not give a significant response to increased
nitrogen absorption. Urea fertilizer dose of 150 kg / ha on the use of
Rhizobium inoculant tends to give a negative reaction to the Physiology
Efficiecy Of Nitrogen Absorbtion (PEN), nodule, and weight of 100 grains.
Physiology Efficiecy Of Nitrogen Absorbtion (PEN) of three varieties tested
were not affected by the level of nitrogen fertilization and the addition of
Rhizobium.
Penulis: Makruf Hamidah,
Hamidah Hanum, Deni Elfiati
Kode Jurnal: jppertaniandd150348
