Impact of Irrigation Levels and Fertigation Frequency on Yield, Water and NPK Use Efficiencies of Safflower under New Valley Conditions | ||
| Assiut Journal of Agricultural Sciences | ||
| Article 1, Volume 46, Issue 3, June 2015, Pages 1-15 PDF (396.03 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajas.2015.545 | ||
| Abstract | ||
| Two field experiments were conducted at the Research Farm, Agricultural Research Station, El-Kharga, New Valley Governorate, Egypt, during 2011/2012 and 2012/2013 seasons to study the impact of irrigation levels (I1=100%, I2= 80% and I3= 60% of potential evapotranspiration, ETp) and fertigation frequency (F1= 3, F2= 6, F3= 12 and F4= 18 doses) on safflower crop. The experiments were laid out in randomized complete block design in strip-plotarrangementwith three replicates. Results showed that the highest mean values of seed yield, oil yield and NPK use efficiency were recorded from drip irrigation at 100% of ETp with number fertigation splitting to 12 equal doses. The increment percentage of seed yield due to I1F3 treatment over fertigation splitting 3 doses under the same irrigation treatment were 62.2% and 61.1%, 42.34% and 41.63% when using I2F4 treatment in both seasons, respectively as compared to 100% of ETp with fertigation splitting 3 equal doses (I1F1). The highest mean values of water use efficiency were recorded from drip irrigation at 80% of ETp with fertigation splitting 18 doses in both seasons. So, it is concluded that treated safflower plants with I2F4 to get economical yield and water use efficiency, respectively; therefore it may be saving 20% of irrigation water. | ||
| Keywords | ||
| safflower; fertigation; New Valley; NPK; water use efficiency | ||
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