RESPONSE OF GRAIN SORGHUM TO FOLIAR SPRAY WITH ASCORBIC AND CITRIC ACIDS UNDER DIFFERENT RATES OF NITROGEN FERTILIZER IN SANDY SOIL | ||||
| Journal of Plant Production | ||||
| Article 2, Volume 31, Issue 11, November 2006, Page 6825-6837 PDF (3.88 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2006.236360 | ||||
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| Author | ||||
| A. E. A. A. Mourad, | ||||
| Agrlc. Res. Center-Field Crops Res. Inst.- Sorghum Depart. | ||||
| Abstract | ||||
| Two field experiments were carried out at Ismailia Agricultural Research Station, during 2002 and 2003 seasons to study the response of short grain sorghum variety (Dorado) to foliar spray with 500 ppm from ascorbic acid (A. A.), citric acid (CA) and mixture of (A.A. + C.A.) as well as control (without spraying) under different rates of nitrogen fertilizer Le. 80,100,120 and 140 kg N/fed. in sandy soil conditions. The results in these trials show that: Increasing nitrogen fertilization rates from 80 to 120 kg N/fed. significantly increased plant height, head weight, grain weight/head, number of kernels per panicles and grain yield/fed. Whereas, adding 140 kg N/fed. recorded insignificant decrease in these characters compared with plants received 120 kg N/fed. Total chlorophyll in leaves, as well as protein, phosphorus and potassium percentages in grains were increased gradually with increasing nitrogen rates from 80 to 140 kg N/fed. The foliar spray of grain sorghum plants with ascorbic and 'citric acids gave the highest values in plant height, head weight, grain weight/head, green weight/fed. , grain yield/fed. , total chlorophyll in leaves as well as protein, phosphorus and potassium percentages in grains, whereas number of kernels/head gave maximum value by spraying 500 ppm citric acid only. The interaction effect between nitrogen fertilizations and ascorbic & citric acids recorded significant effect on plant height, LAI, head weight, grain weight/head, 1000 kernel weight and grain yield/fed. Most of these characters gave the highest values by adding 120 kg N/fed. and sprayed with mixture of AA and C.A. Also, 1000 kernel weight gave the highest value by adding 140 kg N/fed. without spray of organic acids. Maximum values percentage of protein, phosphorus and potassium in grains as well as total chlorophyll in leaves were extracted by adding 140 N/fed. with spraying (A.A. + C.A.) mixture. | ||||
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