Nawar, A., Ibrahim, H., Khalil, H. (2016). RESPONSE OF SUNFLOWER TO DIFFERENT CROPPING PATTERNS AND N FERTILIZER RATES. Menoufia Journal of Plant Production, 1(1), 89-100. doi: 10.21608/mjppf.2016.176566
A.I. Nawar; H.M. Ibrahim; H.E. Khalil. "RESPONSE OF SUNFLOWER TO DIFFERENT CROPPING PATTERNS AND N FERTILIZER RATES". Menoufia Journal of Plant Production, 1, 1, 2016, 89-100. doi: 10.21608/mjppf.2016.176566
Nawar, A., Ibrahim, H., Khalil, H. (2016). 'RESPONSE OF SUNFLOWER TO DIFFERENT CROPPING PATTERNS AND N FERTILIZER RATES', Menoufia Journal of Plant Production, 1(1), pp. 89-100. doi: 10.21608/mjppf.2016.176566
Nawar, A., Ibrahim, H., Khalil, H. RESPONSE OF SUNFLOWER TO DIFFERENT CROPPING PATTERNS AND N FERTILIZER RATES. Menoufia Journal of Plant Production, 2016; 1(1): 89-100. doi: 10.21608/mjppf.2016.176566
RESPONSE OF SUNFLOWER TO DIFFERENT CROPPING PATTERNS AND N FERTILIZER RATES
1Crop Science Department, Faculty of Agriculture, Alexandria University, Egypt
2Agriculture Research Center, Crop Intensification Dept. Egypt
Abstract
Sunflower response to four cropping systems and 30 (N1), 45 (N2) and 60 (N3) kg N/fed. were studied at Agriculture Research Station, Alexandria University, Egypt, during 2013 and 2014 summer seasons. Cropping systems were sunflower relay-cropping into (Sun1) or double cropping with faba bean (Sun2), in addition to sunflower double cropping following fodder (Sun3) and silage (Sun4) maize crops. Responses of head and 100-seed weights, as well as seed yield/ fed and harvest index (HI) to cropping systems, were significant over the two seasons. The highest values of those traits were obtained from relay-cropped sunflower to faba bean (Sun1), however, the lowest values resulted from sunflower sowing after silage maize (Sun4), that was previously relay-cropped into faba bean. Differences in seed yield and HI, for the combined treatments, were significant, as indicated by crop systems*N levels interaction in both seasons. The highest values of the two traits were obtained from (Sun 1) at 45 kg N /fed, whereas, the least values resulted from (Sun4) at 15 kg N/fed. increasing the nitrogen level from 30 to 60 kg/ fed led to significant increases in plant height, head seed weight, seed yield/ fed and harvest index in both seasons. Response of head –seed and 100-seed weight, in addition to seed yield /fed. of sunflower, as N level was applied up to 45 kg N/fed. to nitrogen fertilization, was linear. Sunflower relay-cropping and growing of short season crops should be applied to enable farmers to plant more than two crops per year.
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