Study of combination of nitrogen chemical and biological fertilizers and harvesting time on yield quantity and quality of dual purpose barley

Zahra mardasi ¹ (Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)
MANI MOJADDAM ² (Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)

Submited date : 2016-05-30 accepted date : 2016-08-22

Keywords: nitrogen, Harvesting time, Bio fertilizers, dry forage,

Abstract :

This experiment was conducted based on split plot layout with completely randomized block design with 3 replications. The experiment included Nitrogen fertilizer as the main factor : 1- pure Nitrogen 100%. 2- Nitrogen 75% + Nitroxin. 3- Nitrogen 50% + Nitroxin. 4- Nitrogen 25% + Nitroxin. And sub factor include 3 levels of harvesting forage : 1- Without forage harvest. 2- Harvest in the end of tillering stage 30 Zadks. 3- Harvest in mid-stem elongation 33-32 Zadks. Results showed that effect of Nitrogen fertilizer on protein forage yield and grain yield significant at %1 level of probability and on thousand grain weight, number of grains in spike, forage protein percent, and forage yield was significant at %5 level of probability. in Effect of harvesting time forage driest forage yield, protein forage, grain yield significant at %1 level of probability and And grain number of spikes, grain weight, and forage protein percent was significant at %5 level of probability. Maximum grain yield in Nitrogen fertilizer 75% + Nitroxin and without forage harvest with 5197 kg/ha. Minimum grain yield in Nitrogen 25% + Nitroxin and Harvest in mid-stem elongation with 1920 kg/ha. The highest dry forage yield in Stage Harvest in mid-stem elongation with 2386 kg/ha. Highest protein percentage with 21.7% was attained in harvest time of late tillering. Due to the results effect of Nitrogen fertilizer 75% + Nitroxin can be the best grain yield and forage.