The Effect of N-Fertilizer Coating ongThe Proximate Content of Sweet Corn (Zea mays) Corn

Abstract

The experiment was conducted to study the effect of N- fertilizer coating on proximate content of sweet com straw. The study was performed on regosol soil at the Agricultural Training Research and Development Center (ATRD or KP-4), Gadjah Mada University, Kalitiito, Berbah, Sleman, Yogyakarta. Five hundred meter square land was used and divided into 12 plots of 6m X 6m sized and were planted sweet com seed at spaced of about 0.25m within rows and 0.75m between rows. Three urea fertilizer treatments were applied with four replication, namely: conventional
urea application (tmcoating), where urea given at the rate of 400kg per ha (T-1), and urea oil coating application given at the rate of 60% (T-2) and 40% (T-3) of T-1. Data found were then subjected to statistical analysis following the randomized complete block design (RCBD). Results of the study indicated that there were significant (P<0.05) effect of treatment on crude protein (CP) and on ash content. The highest (P<0.05) Cl‘ content was obtained at T-1 (4.36%), followed by T-2 (2.95%), and the lowest was T-3 (2.55%). The highest ash content was recorded for T-2 (8.24%) which its comparable to T-1 (8.21%), and the least (P<0.05) was T-3 (7.92%). Others nutrient content (crude fat, crude fiber, Ca, P and nitrogen free extract or NFE) between the treatment groups, no significant differences (P>0.05) were found. It can be concluded that N-fertlizer coating applied at lower
rate than the tuiooating (conventional) one, resulted in negative effect on CP content of sweet com straw.