Response of Flax Plant (Linum usitatissimum L.) To Different levels of Nitrogen and Phosphorus Fertilizers

Abstract

A field experiment was carried out during winter season 2018-2019 at Research Station of Agriculture College – University of Anbar in Al-Ramadi district - Anbar governorate Al-Hamdhiah , to study the response of flax to four levels of nitrogen fertilizer (0, 50, 100 and 150) kg h-1 as urea (46% N) and four levels of phosphorus (0, 40 ,80 and 120) kg h-1 as (45% P2O5) on growth and yield of flax. Factorial arrangement was used according to RCBD design with three replications. The results showed that increasing Nitrogen fertilizer levels to a 150 kg h-1 significantly increased in plant height, fruit branches per plant, number of capsules per plant, number of seeds per capsule, seed yield, biological yield and harvest index. (116.45 cm, 12.62 branch plant-1, 33.18 capsules plant-1, 8.64 seed capsules-1, 1.74 ton ha-1, 6.01 ton ha-1 and 28.99%) respectively. While the control treatment gave the lower mean of this traits. The phosphorus level 120 kg ha-1 gave highest mean of plant height, fruit branches per plant, number of capsules per plant, number of seed per capsules, seed yield, biological yield and harvest index (114.75 cm, 12.29 branch plant-1, 32.99 capsules plant-1, 8.49 seed capsules-1, 1.67 ton ha-1, 5.96 ton ha-1 and 28.10%) respectively. The interaction treatments between Nitrogen and phosphorus varied in most studied traits, the treatment 150 kg N ha-1 and 120 kg P ha-1 gave highest mean of seed yield 1.88 ton ha-1.