[Effects Of Irrigation And Date Of Added Nitrogen fertilizer On productivity and Protein percentage of Two durum Wheat varieties (Cham 3 and Duma 1]
2013
Abed- Alrahman
This research was carried out during the growing season 2008- 2009, 2009- 2010 . two varieties of durum wheat are (Duma 1 and cham 3) Were planted and nitrogen fertilizer added (urea 46%) at one level of 14.1 pure Nitrogenper Donum, the added amount determined in accordance with four treatments include the first treatment to add full amount before planting ,the second treatment include adding in two splits (one before planting, and the second at tillering stage ) and third treatment adding three splits (the first before planting, and the second at tillering , while the third was at the beginning of heading stage ) and the fourth treatment includes adding amount in two splits divided equally (before planting , at the heading stage) experiment also included two watering treatments . the first irrigation treatment include adding a full water requirement of plants The second treatment included giving the plant 75% of the required amount of irrigation. The results showed superiority of the first irrigation treatment on the second irrigation treatment in terms of grain yield and the most important components (the number of spikes / m 2, number of grains in spike, thousand grain weight). While the second irrigation treatment is surpassed first irrigation treatment in terms of percentage of protein. The results also indicate that using first irrigation treatment 100%with dividing the recommended amount of nitrogen to three splits are given equally (before planting- at tillering and at Heading) gave high yields and a high percentage of protein and also investigating highly effective in the use of water. While addition nitrogen at one time before planting lead to reduce the grain yield and protein content.
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