EFFECT OF DIFFERENT RATES OF NPK FERTILIZATION ON WHEAT (Triticum aestivum, L) UNDER NEWLY CULTIVATED SANDY SOIL CONDITIONS | ||||
| Journal of Plant Production | ||||
| Article 3, Volume 34, Issue 3, March 2009, Page 1797-1817 PDF (806.37 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2009.116939 | ||||
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| Authors | ||||
| A. A. Mansour; A. H. Bassiouny; M. F. Abd El-Maksoud | ||||
| Plant Production Dept. (Agronomy) Inst. of Efficient Productivity, Zagazig Univ., Egypt. | ||||
| Abstract | ||||
| Two field experiments were carried out during 2005/2006 and 2006/2007 seasons in three locations i.e., El-Khattara and El-Salhya, Sharkia Governorate and El-Areish, North Sinai Governorate, Egypt to study the effect of four PK-fertilizer levels (15.5 kg P2O5 + 24 kg K2O, 15.5 kg P2O5 + 48 kg K2O, 31.0 kg P2O5 + 24 kg K2O and 31.0 kg P2O5 + 48 kg K2O/fad.) and six N-fertilizer levels (40, 60, 80, 100, 120 and 140 kg N/fad.) on yield, yield components and yield analysis of wheat. The obtained results could be summarized as follows : Increasing PK-fertilizer levels up to 31.0 kg P2O5 + 48 kg K2O/fad. at El-Khattara and up to 31.0 kg P2O5 + 24 kg K2O/fed. at both El-Salhya and El-Areish caused a significant increase in number of spikes/m2. Number of grains/spike, 1000-grain weight and straw, grains and biological yields/fad. were significantly increased by adding 31.0 kg P2O5 + 48 kg K2O/fad. at the three locations. However, the effect of PK-fertilizers on grain weight/spike at the three locations was not significant, except at El-Khattara and El-Salhya locations in the 1st season which was significant. Increasing N-levels up to 140 kg N/fad. resulted in a significant increase in number of spikes/m2 at the three locations, while increasing N-levels up to 120 kg N/fad. was accompanied by a significant increase in number of grains/spike at the three locations, 1000-grain weight at El-Salhya and El-Areish and biological yield/fad. at El-Ariesh. However, grain weight/spike at the three locations, 1000-grain weight at El-khattara, straw and grain yields/fad. at the three locations and biological yield/fad. at El-Khattara and El-Salhya were significantly increased when 100 kg N/fad. was applied. The significant interaction effect between the studied factors indicated that wheat plants grown at El-Salhya and fertilized with 31.0 kg P2O5 + 48 kg K2O and 140 kg N/fad. gave the highest values of number of spikes/m2. Also, the highest values of 1000-grain weight, grain yield and biological yield were attained when wheat plants were fertilized with 31.0 kg P2O5 + 48 kg K2O and 100 kg N/fad. and this was true at El-Ariesh location. Plants grown at El-Khattara and fertilized with 31.0 kg P2O5 + 24 or 48 kg K2O gave the highest straw yield/fad. when 140 kg N/fad. was applied. However, wheat plants grown at El-Khattara location surpassed those grown at El-Salhya and El-Ariesh locations in most of studied characters. Positive and highly significant correlation coefficients were detected between grain yield/fad. and all studied characters. The path analysis revealed that the direct effect of number of spikes/m2 was 63.98% being higher than that of number of grains/spike and 1000-grain weight which were 11.85 and 4.71% of grain yield variation, respectively. | ||||
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