Pengaruh Jumlah dan Waktu Defoliasi Daun terhadap Produksi dan Mutu Benih Jagung (Zea mays L.) Hibrida

Abstract

One effort that can be used to increase hybrid seed production is environmental manipulation techniques. This study aims to determine the effect of defoliation time and the amount of leaf defoliation on female plants on the production and quality of hybrid corn seeds. The research was conducted from September 2022 to February 2023 in the Jember State Polytechnic seed production area. The study used a randomized block design (RBD) with 4 replications. Observational data were then analyzed using annova and DMRT level 5% follow-up test. The first factor was defoliation time (D) with 3 levels, namely defoliation at 70 DAP (D1), defoliation at 77 DAP (D2) and defoliation at 84 DAP (D3). The second factor was the amount of leaf defoliation with two levels, namely defoliation leaving 4 leaves under the cob (P1) and defoliation leaving 2 leaves under the cob (P2). The results showed that the defoliation time treatment at 77 DAP (D2) had a significant effect and gave the best results on the parameter weight of 100 seeds weighing 27.51 grams, seed germination rate of 97.94% and growth speed of 20.54%. while defoliation left 4 leaves under the cob (P1) had a significant effect and gave the best results at 100 seed weight of 27.39 grams and germination rate of 97.71%. The interaction between defoliation time and the amount of leaf defoliation had no significant effect on all research parameters