Effect of sulphur and phosphorus fertilizer on growth and yield of Sunflower (Helianthus annuus L.)
ANBAR JOURNAL OF AGRICULTURAL SCIENCES,
2009, Volume 7, Issue 4, Pages 65-80
AbstractA field experiment was carried out during Spring season (2004) in Ishaqi Research Station Company For Industrial Products Ministry of Agricultural to study the effect of sulphur and phosphorus fertilizer applications on some growth properties and seed yield of sunflower hybrid Iraq flower Split plot design with four replications was used . Phosphorus levels were (0, 60, 120, 180, 240 kg P2O5/ h) as main plots whereas the sub plots were sulphur levels (600, 1200, 1800, 2400, 3000 kg S/ h).
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During the flowering and maturity stage , some of crop growth index and parameters yield components were estimated . The result were : Sulphur application influenced the plant morphological characters significantly but the phosphorus application was significant of some the plant morphological characters ( plant high , stem thickness and sunflower disk diameter ) . The interaction between the two factors influenced the dry matter of leaves and disc diameter significantly . Sulphur application increased the seed number per disc , weight of 1000 seed , plant yield and total yield characters . The sulphur level 1800 kg S / h gave the highest yield , 5.390 t / h . The behavior of phosphorus fertilizer in its effects was similar to that of sulphur except in seed number per disc , as the level 120 kg P2O5 / h gave the highest total seed yield , 6.92 t / h . The interaction significantly influenced seed number , plant yield and total yield characters . the interaction of 1200 kg S / h + 120 kg P2O5 / h gave the highest yield , 6.974 t / h .
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