Korelasi Hara Mikro Tersedia Tanah Dengan Serapan Hara Mikro Jagung Yang Dipupuk Hara Mikro

Abstract

Salah satu cara memperbaiki ketersediaan hara mikro dan meningkatkan hasil jagung adalah dengan pemupukan hara mikro sesuai dengan kebutuhan tanaman. Tujuan penelitian ini adalah untuk memperoleh koefisien korelasi antara hara mikro tersedia dalam tanah dan serapan hara mikro jagung berdasarkan dua metode analisis hara mikro tersedia tanah dan menguji pengaruh hara mikro pada pertumbuhan dan hasil jagung manis. Rancangan acak kelompok dengan 8 perlakuan dan 4 kelompok digunakan dalam percobaan pemupukan hara mikro ini. Perlakuan terdiri dari 4 taraf pupuk mikro (PM) yaitu Kontrol (tanpa PM), ½ PM, 1 PM dan 1 ½ PM, dikombinasikan dengan ¾ dan 1 dosis standar (STD) pupuk mineral dan perlakuan pupuk mineral standar tanpa PM. Hasil percobaan menunjukkan bahwa hubungan antara Cu, Zn, Fe, dan Mn tersedia tanah berdasarkan metode analisis DTPA dengan serapan hara mikro yang sama oleh jagung mempunyai koefisien korelasi (r) lebih tinggi dan nyata dibandingkan dengan koefisien korelasi metode analisis EDTA. Pengaruh perlakuan hara mikro pada variabel tinggi tanaman pada umur 8 minggu setelah tanam menunjukkan bahwa perlakuan 1 STD + ½ PM menunjukkan tinggi tanaman tertinggi dan nyata lebih tinggi dibandingkan perlakuan kontrol dan standar (STD). Perlakuan 1 STD + 1 PM menunjukkan bobot tongkol jagung tertinggi, nyata lebih tinggi dibandingkan kontrol, namun tidak berbeda nyata dibandingkan perlakuan lainnya. Nilai efektivitas agronomik relatif (RAE) perlakuan 1 STD + ½ PM dan 1 STD + 1 PM berturut turut 112.5% dan 113.2% yang menunjukkan kenaikan 12.5% dan 13.2% bobot tongkol jagung akibat perlakuan ½ dan 1 dosis pupuk mikro dibanding perlakuan pupuk mineral dosis standar tanpa pupuk mikro.

Kata kunci : DTPA, EDTA, hara mikro, koefisien korelasi

One way to improve the availability of micronutrients and increase maize yields is by fertilizing micronutrients according to plant needs. The aim of this study was to obtain the correlation coefficient between available micronutrients in soil and maize nutrient uptake based on two soil available micronutrient analysis methods and examine the effect of micronutrients on the growth and yield of sweet corn. A randomized block design with 8 treatments and 4 groups was used in this micronutrient fertilization experiment. The treatment consisted of 4 levels of micro fertilizer (PM), namely Control (without PM), ½ PM, 1 PM and 1 ½ PM, combined with ¾ and 1 standard dose (STD) of mineral fertilizer and standard mineral fertilizer treatment without PM. The experimental results showed that the relationship between Cu, Zn, Fe, and Mn available in soil based on the DTPA analysis method with the same micronutrient uptake by corn had a higher and more significant correlation coefficient (r) compared to the correlation coefficient of the EDTA analysis method. The effect of micronutrient treatment on variable plant height at the age of 8 weeks after planting showed that the 1 STD + ½ PM treatment showed the highest plant height and was significantly higher than the control and standard treatment (STD). The 1 STD + 1 PM treatment showed the highest corn cob weight, significantly higher than the control, but not significantly different from the other treatments. The relative agronomic effectiveness (RAE) values of 1 STD + ½ PM and 1 STD + 1 PM treatment were 112.5% and 113.2%, respectively, which showed an increase of 12.5% and 13.2% in corn cob weight due to ½ and 1 dose of microfertilizer treatment compared to the dose of mineral fertilizer treatment standard without microfertilizer.

Keywords: DTPA, EDTA, micronutrients, correlation coefficient