Description:
One of the problems in phosphate nutrient fertilization is a low level of efficiency, so the
application of arbuscular mycorrhiza is often done to increase phosphate uptake. In this study
mycorrhizal was applied to shallots which were given P fertilizer to assess the effect of
mycorrhizal applications on growth, yield, and phosphate uptake. This research was carried out
at the Faculty of Agriculture's Greenhouse of the University of Lambung Mangkurat Banjarbaru
from March to May 2016. The seed of shallot was grown on 5 kg of soil and quartz sand (3:1)
fertilized by P (0, 50, 100, 150, 200 and 250 kg SP-36 ha-1) and applied with mycorrhiza
(without and with 10 g of plant-1 mycorrhizal inoculum) at planting. The observations made
after 75 days after planting showed that the application of arbuscular mycorrhiza was effected
to improve several observation variables, namely plant dry weight, bulb dry weight, phosphate
nutrient uptake, and phosphate efficiency. The application of mycorrhiza at phosphate doses of
250 kg SP-36 ha-1 can increase plant dry weight by 97% and bulb dry weight by 203%
compared to without mycorrhiza. Whereas the application of mycorrhiza at a phosphate dose
of 100 kg SP-36 ha-1 is the best and most efficient treatment to increase phosphate nutrient
uptake and phosphate efficiency. The results of this study show that the application of
mycorrhizal can increase nutrient uptake of phosphate which ultimately increases the growth
and production of shallot plants.
Keywords: shallot; phosphate fertilizers; mycorrhiza arbuscular