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[9000910.] رقم البحث : 9000910 - |
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Impact of Irrigation Levels and Fertigation Frequency on Yield, Water and NPK Use Efficiencies of Safflower under New Valley Conditions / |
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قطاع الدراسات الزراعية / General |
| تخصص البحث : General |
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Assiut Journal of Agricultural Sciences / |
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يوسف خيرى انور ( 01226313930 ) |
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Safflower, fertigation, New Valley, NPK, water use efficiency |
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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-plot arrangement with 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 fertiga-tion splitting 3 equal doses (I1F1). The highest mean values of water use effi-ciency 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. |
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