EFFECTS OF ORGANIC AND CHEMICAL FERTILIZER INPUTS ON BIOMASS PRODUCTION AND CARBON DYNAMICS IN A MAIZE FARMING ON ULTISOLS
Abstract: An effort to
increase the yield and reduce carbon loss from maize farming practices on
Ultisols largely depend on fertilizer inputs and in situ crop residual
management. The experiment aimed to estimate yields, biomass production and
carbon dynamics of several management fertilization on maize farming practice
on Ultisols has been conducted from March to July 2013 in Taman-bogo
Experimental Farm, East Lampung. The experiment was set up as a randomized
complete blockdesign, consisted of 6 treatments namely: 5 t ha-1 of cattle
manure, 5 t ha-1of dried sludge manure, and its combination with 200 kg urea
ha-1 + 125 kg SP36 ha-1 + 50 kg KCl ha-1 (50% of recommended dose of inorganic
fertilizers “RDIF”) and 75% of RDIF. The experimental results revealed that
application of combined organic with inorganic fertilizers increased the
biomass production, carbon fixation, and grain yield significantly. More than
50% of produced biomass and fixed carbon (grain, maize cob, maize husk, stems
and leaves) were removed from maize farming. The use of organic fertilizer
combined with NPK fertilizer at 50% of RDIF can be applied to increase the
biomass production, organic carbon fixation and maize grain yield in
sustainable ways.
Author: Maswar, Yoyo Soelaeman
Journal Code: jppertaniangg160022