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