El- Murshedy, W. (2008). EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN. Journal of Plant Production, 33(1), 53-63. doi: 10.21608/jpp.2008.126206
W. A. El- Murshedy. "EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN". Journal of Plant Production, 33, 1, 2008, 53-63. doi: 10.21608/jpp.2008.126206
El- Murshedy, W. (2008). 'EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN', Journal of Plant Production, 33(1), pp. 53-63. doi: 10.21608/jpp.2008.126206
El- Murshedy, W. EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN. Journal of Plant Production, 2008; 33(1): 53-63. doi: 10.21608/jpp.2008.126206
EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN
Two field experiments were carried out at the Agric. Exp. and Res. Stat., Fac. Agric., Cairo Univ., during 2004/2005 and 2005/2006 seasons to study the effect of three plant densities (33 , 44 and 55 plants/m2), three phosphorus levels (15.5 , 31 and 46.5 kg P2O5/fed) and three nitrogen levels (25 , 40 and 55 kg N/fed) on yield and its components of lupin (Giza 1). The main effects could be summarized as follows:
The results revealed that the lowest density i.e. 33 plants/m2 gave significantly the highest number of branches and pods/plant, seed yield/plant and seed index , but the shortest plants with the fewest number of seeds/ pods and the lowest averages of seed yield/fed and seed protein content.
Increasing phosphorus from level 15.5 to 46.5 kg P2 O5/fed increased yield and its components. The seed yield/fed was increased as applied P2O5 level was increased up to the highest level i.e. 46.5 kg P2 O5/fed. Adding phosphorus at a level of 46.5 kg P2O5/fed increased seed yield/fed over the plants fertilized by 15.5 or 31 kg P2O5/fed levels by 20.23 and 3.89 %, respectively as average of the two seasons.
Increasing nitrogen from 25 to 55 kg N/fed increased all studied components. Application of 40 kg N/fed increased seed yield/fed., over the 25 kg N/fed level by 39.72 % where the further increase of N level caused insignificant increase in seed yield/fed.
The interaction between the three studied factors had significant effects on seed yield/plant and per feddan in both seasons. The highest significant seed yield/fed was recorded from sowing at plant density of 55 plants/m2 and fertilization with 31.0 kg P2O5/fed and 40 kg N/fed.
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