Authors:
Pujawati Suryatmana, Mieke Rochimi Setiawati, Reginawanti Hindersah, Ari Satria and Betty Natalie
Fitriatin ,Indonesia
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Abstract:
Indonesia is a tropical agricultural country that has an Andisol soil order which is potential to be
used for the cultivation of lettuce (Lactuca sativa L.). To increase lettuce yields, farmers
generally use excessive synthetic NPK fertilizers. This has resulted in serious pollution and land
degradation. As an effort to restore soil fertility conditions that are environmentally friendly is
through the application of biological fertilizers. Biofertilizer inoculation that potentially used is a
form of consortium, which consists of the N-fixing group, namely Azotobacter spp and
phosphate solubilizing bacteria (Pseudomonas sp.). The characteristics of the consortium
inoculant that need to be investigated are its viability and effectiveness when applied in the field
to lettuce cultivation. The experimental data analysis was carried out based on the linear model
of the Randomized Block Design (RBD), consisting of seven treatments, namely: control; NPK
100% recommended dosage; consortium 10 l / h + 100% NPK; consortium 10 l / h + 75% NPK;
; consortium 10 l / h + 50% NPK; consortium 10 l / h + 25% NPK. The results showed that
consortium inoculation of 10 l / h + 50% NPK could increase the population of Azotobacter spp.
and the yield of fresh lettuce increased by 49.24%. Meanwhile, in the application of the
consortium inoculation of 10 l / h + 25% NPK, tend increasing N absorption value. The
consortium inoculant can reduce the NPK requirement by 50% followed by a higher fresh weight
yield of lettuce compared to use 100% NPK, by using conventional method. |
