PHYSIOLOGICAL RESPONSE OF WHEAT UNDER DIFFERENT LEVELS OF ORGANIC MATTER AND NITROGEN FERTILIZATION AND ITS EFFECTS ON YIELD AND GRAIN QUALITY IN SOUTH OF SINAI

Abstract

Two bread wheat cultivars (Triticum aestivum L.) i.e. Sakha 8 and Sakha 92 grown under Ras Sudr experimental station were investigated during I 090/1991 and 199 I /1992 under three levels of organic matter (sheep dung) i.e., 0, 30, and 60 m 3/fcd as well as four treatments of mineral nitrogen at the rates 40, 80, 120, 160 kg N/fed.

The main results obtained were as follows: I. Sakha 8 was superior than Sakha 92 in plant height, stem diameter, nag leaf area and specific leaf weight. On the other hand Sakha 92 grain and straw yield" surpassed significantly Sakha 8 cultivar. Total carbohydrates as well as sodium content were significantly more in Sakha 8 than Sakha 92 while protein, phosphorus, and potassium contents were less in Sakha 8 than Sakha 92. 2. All growth characters as well as grain, straw yield and the different yield components were significantly increased with increasing th organic matter application. In addition total carbohydrates, protein, phosphorus, and potassium contents had a significant increase while sodium content was significantly decreased with increasing the organic matter application.