EFFECT OF PLANT DENSITY, PHOSPHORUS AND NITROGEN FERTILIZATION LEVELS ON YIELD AND ITS COMPONENTS OF LUPIN | ||
| Journal of Plant Production | ||
| Article 4, Volume 33, Issue 1, January 2008, Pages 53-63 PDF (649.19 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2008.126206 | ||
| Author | ||
| W. A. El- Murshedy* | ||
| Agron. Dept., Fac. of Agric. Cairo Univ., Giza | ||
| Abstract | ||
| 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. | ||
| Keywords | ||
| Lupin ( Lupnus termis; L); plant density; phosphorus and nitrogen fertilization | ||
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