Abstract
Generally, coastal sandy soil has low water content and potassium nutrients. One way to fix this is by adding organic matter and potassium fertilizers. Sugarcane press mud compost as organic material acts as a slow-release fertilizer, it has an effect long enough to support plant growth. A pot experiment was carried out to test the probability of combining sugarcane press mud compost and potassium fertilizer to improve the vegetative growth of corn plants in coastal sandy soils. This research was arranged in a factorial completely randomized design. The first factor is the dosages of sugarcane press mud compost (0, 20, 25, 30, 35 tons per hectare). The second factor is the dosages of potassium fertilizer (0, 60, 90, and 120 kg K2O per hectare). After applying basal fertilizer (120 kg N per hectare and 90 kg P2O5 per hectare) and the treatment factor has been applied, the corn seed is planted and grown until vegetative growth or at flowering. The results showed that sugarcane press mud compost and potassium fertilizer interacted with the effect of shoots fresh and dry weight, fresh weight, and root dry weight. The combination treatment of 25 tons of sugarcane press mud compost per hectare and 90 kg K2O per hectare (B2P2) resulted in the highest fresh weight and dry weight of shoots. Meanwhile, the combination of 0 tons of sugarcane press mud compost per hectare and 120 kg K2O per hectare (B0P3) produced the highest fresh weight and plant roots' dry weight. The two treatments did not interact in influencing plant height and potassium content in the corn leaf tissue. Both the sugarcane press mud treatment (20, 25, 30 and 35 tons per hectare), and the application of potassium fertilizer (60 and 90 kg K2O per hectare) significantly increased plant height growth. The highest dosage of sugarcane press mud compost (35 tons per hectare) and potassium fertilizer (120 kg K2O per hectare) produces potassium content in plant leaf tissue
Highlights
Coastal sandy soil has low water content and potassium nutrients
One of the problems of coastal sandy soil is that it has a low capacity to store water, low content of clay minerals, organic matter, and nutrients (Ismail and Ozawa, 2006; Slavich et al, 2010)
The research results by Kayser et al (2012) found that the leaching process of potassium nutrients in sandy soils will increase in parallel with the leaching process of nitro-nitrogen elements
Summary
Coastal sandy soil has low water content and potassium nutrients. One way to fix this is by adding organic matter and potassium fertilizers. The two treatments did not interact in influencing plant height and potassium content in the corn leaf tissue Both the sugarcane press mud treatment (20, 25, 30 and 35 tons per hectare), and the application of potassium fertilizer (60 and 90 kg K2O per hectare) significantly increased plant height growth. The highest dosage of sugarcane press mud compost (35 tons per hectare) and potassium fertilizer (120 kg K2O per hectare) produces potassium content in plant leaf tissue. One source of organic material that can be used to improve coastal sandy soil's physical properties is sugarcane press mud, which is a waste processing sugarcane stalks into sugar This organic waste has a high nutrient and carbon content so that it has the potential to increase soil humus. The experimental results of Halifah et al (2014) proved that giving composted sugarcane bagasse can increase the weight of plant biomass and tuber weight
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