Potential of Kirinyuh (Chromolaena odorata) and Cow Manure for Available Phosphor Supply on Sandy Beach Soil and P Uptake by Onion (Allium cepa L.)

Abstract

Abstract The low availability of phosphorus nutrients for onion plants resulted in disruption of the plant growth process such as blocking the extension of the root causing the uptake of nutrients decreased. This research was conducted to know the role of Kirinyuh (Chromolaena odorata) and cow manure for available phosphor of Sandy Beach Soil and P uptake by onion. The research method used was the Completely Randomized Design Method of 15 treatments, namely the mixture treatment of cow manure (S) and kirinyuh (K) at 10, 20 and 30 tons/ha equivalent doses. The treatment was: the dose of S and K mixture at without cow manure and kirinyuh (P0), 10 ton/ha comprised S/K ratios of 100/0 (P1), 75/25 (P2), 50/50 (P3), 25/75 (P4), 0/100 (P5); at 20 ton/ha comprised S/K ratios of 100/0 (P6), 75/25 (P7), 50/50 (P8), 25/75 (P9), 0/100 (P10); and at 30 ton/ha comprised S/K ratios of 100/0 (P11), 75/25 (P12), 50/50 (P13), 25/75 (P14), 0/100 (P15). Each treatment was repeated 3 (three) times. The results were analyzed by variance at 5% significant level and tested further with Duncan Multiple Range Test at 5% level if there was a significant influence. The results showed that the mixture of cow manure and kirinyuh could increase P available of Sandy Beach Soil and P uptake of onion. Giving a mixture of cow manure (S) 25% and kirinyuh (K) 75% at the equivalent dosage of 30 tons/ha significantly gave the higestes P available of Sandy Beach Soil and P uptake of onion.