복합작업형 지중 변량시비 시험장치 활용 옥수수 생육효과 분석

초록

This study examined the growth characteristics of corn according to the deep fertilization method and fertilization depth using a combined-operation variable-rate deep fertilization test device. The experiment consisted of a conventional fertilization treatment with top dressing after ridge-incorporated solid fertilization, a treatment combining ridge-incorporated solid fertilization and deep fertilization using controlled-release fertilizer, and a deep fertilization treatment using only controlled-release fertilizer. The deep fertilization depths were set to 15 cm and 20 cm. The plant height, first ear height, ear length, ear width, and ear weight were measured at harvest, and an independent-sample t-test was conducted to compare the growth characteristics among treatments. The treatment combining ridge-incorporated solid fertilization and deep fertilization at 20 cm showed growth characteristics similar to those of the conventional treatment and exhibited the highest average plant height and first ear height. In contrast, the treatment using only controlled-release fertilizer showed a shorter plant height and first ear height than the conventional treatment. In addition, the 20 cm treatment generally showed longer plant height and first ear height than the 15 cm treatment. Therefore, deep fertilization using controlled-release fertilizer may provide useful insights into improving fertilization methods in corn cultivation.

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