SERAPAN N TANAMAN JAGUNG (Zea mays L.) AKIBAT PEMBERIAN PUPUK PELET BERBAHAN ABU TERBANG BATUBARA, BIOMASSA AZOLLA DAN UREA PADA ULTISOL
Daftar Isi:
- One of the ways to fulfill the nitrogen needs of maize plant is by adding urea fertilizer. But in fact, a large amount of nutrients from urea can not be absorbed by plants because the properties of urea are hygroscopic and easily leached. In this study, the efforts were conducted to increase N uptake of maize plants from urea fertilizer by modifying urea fertilizer to be pellets with additional composition of fly ash and azolla biomass. The research was arranged in a Completely Randomized Design with 9 treatments and 3 replications which analyzed variance and orthogonal contrast. The treatment which was applied was kontrol (K), pellet fertilizer compossition (fly ash: azolla): urea (50:50) 70:30 (P-A) at a dose of 100% (P-A1), dose 75% (P-A2 ) and dose 50% (P-A3), pellets compossition (fly ash: azolla): urea (40:60) 70:30 (P-B) with a dose of 100% (P-A1), dose 75% (P -A2) and dose 50% (P-A3) and urea fertilizer with 100% dose and 1 times the application frequency (U-A). Urea fertilizer with 100% dose and 3 times the application frequency (U-B). The results showed that treatments had a very significant influence on the weight of dry stover and N uptake of maize plant, had significant effect on the leaves number and N content of maize plant, but did not have significant effect on the content of K, Ca, Mg, Na and pH H2O soil during the maize plant anthesis phase. N uptake, number of leaves, dry stover weight and N content of maize plant anthesis phase of the treatment pellet fertilizer was significantly higher than those of urea fertilizer. Keywords : Azolla biomass, Fly ash, Maize plants, Pellets fertilizer, Urea