PERTUMBUHAN DAN HASIL BABY CORN PADA BERBAGAI DOSIS N DAN PERIODE BEBAS GULMA

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh pupuk N dan periode bebas gulma terhadap
pertumbuhan dan hasil baby corn, dengan sasaran untuk mendapatkan dosis N yang tepat dan waktu periode
bebas gulma yang paling efektif. Penelitian ini dilaksanakan selama empat bulan, mulai bulan Mei 2006 dan
selesai bulan Agustus 2006. Kombinasi empat taraf pemupukkan N dan lima macam periode bebas gulma
diletakkan pada areal percobaan berdasarkan Rancangan Acak Kelompok Lengkap dan diulang tiga kali.
Data yang diperoleh dianalisis dengan uji F, dan dilanjutkan dengan Duncan Multiple Range Test (DMRT)
dan uji regresi untuk mengetahui pola pengaruh perlakuannya. Hasil penelitian menunjukkan bahwa pupuk N
meningkatkan tinggi tanaman, bobot segar tanaman, serapan N dan komponen hasil serta hasil baby corn.
Hasil baby corn tertinggi (2011.86 kg/ha) dicapai pada pemupukkan N sebesar 123.435 kg N/ha. Periode
bebas gulma 0 sampai 2 mst sudah mampu mengurangi persaingan tanaman dengan gulma. Besarnya serapan
N dan bobot kering tanaman jagung akibat pemberian pupuk N tergantung pada periode bebas gulma.
Serapan N tertinggi (3,50 g per tanaman) diperoleh pada kombinasi dosis pupuk 138 kg N/ha dengan periode
bebas gulma selama 6 mst.
Kata kunci: pupuk N, periode bebas gulma, hasil baby corn

 

ABSTRACT
An experiment evaluating the effects of N fertilization and weeds free period on the growth and yield
of baby corn was carried out for four months, from May until August 2006. This experiment aimed at finding
out the appropriate dose of N fertilizer; determining the most effective time of weeding period; and
evaluating the interaction effects between the two treatments as well as finding the best combination. Four
levels of N application and five magnitudes of weed free periods were laid out in a Randomized Complete
Block Design with three replications. Data obtained was analyzed by F test, and continued by Duncan
Multiple Range Test (DMRT) and Regression test. N fertilization increased crop height, crop fresh weight,
and yield component of baby corn. N application of 46 kg N/ha resulted the highest weight of cob without
husk (1738.74 kg/ha) and there was no significant effect among the level of N fertilization. Weeds free
period significantly decreased the competition rate of crop and weeds. There was no significant effect among
the level of weed free period. Weed free period up to 2 week after planting decreased crop-weed interaction.
The effects of N fertilization on the rate of N uptake and dry weight of plant depended on the degree of weed
free period. The combination of 138 kg N/ha and weed free period during 6 weeks after planting resulted in
the highest N absorption (3.50 g per crop).
Key words: N fertilizer, weed free period, baby corn yield