Investigating Sowing Date and Foliar Application of Boron Effects on some Growth and Yield Parameters of Sesame (Sesamum indicum L.)

Abstract

This field study was conducted at Almashtal area-Heet District-Anbar province during the summer season 0f 2017 in clay loam soil. The layout was a split-plot design with three replicates, the three sowing times (20 April, 20 June, 20 July) occupy experiment the main plots while the Boron concentration (0mg L-1, 100mg L-1, 200mg L-1) occupies the subplots. The field was fertilized with superphosphate fertilizer (P2O5 %46) at the ratio of 80 kg.ha-1 and potassium sulfate (K43%) at the rate of 80kg ha-1 before sowing process during soil preparation. Also, urea fertilizer (N46%) was added at a ratio of 80 kg.ha-1 with two doses the first one at planting and the second after 30 days. Results drawn from this experiment are summarized as follows: Plant height, the height of first capsule, Number of leaves per plant, Seeds yield, biological yield decreased with the delay of sowing time by giving 78.1, 22, 238.8, 242, 982kg ha-1 respectively. While the foliar application with boron led to an increase in seed yield and biological yield by giving 541, 2252 kg ha-1 respectively. Also, some characters values decreased with boron concentration such as first capsule height and number of leaves per plant by giving 29.6 cm, 334.8 leaves per plant inthe treatment of 200 mg L-1.