THE RELATIVE IMPORTANCE OF SOME CHARACTERS TO SEED YIELD OF WHITE LUPIN AS AFFECTED BY PLANTING DATES AND PLANT DENSITIES | ||
| Journal of Plant Production | ||
| Article 7, Volume 27, Issue 1, January 2002, Pages 71-83 PDF (673.82 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2002.247819 | ||
| Authors | ||
| Z. S. EL-Sayad,1; F. Ashmawy2; Sabah M. Attia1; R. E. EL-Lithy1 | ||
| 1Legume Dept., Field Crop Research Institute, ARC | ||
| 2Central Lab. for Design and Statistical Analysis Research, ARC | ||
| Abstract | ||
| Seed yield of white lupin (Lupinus albus L.) varies greatly with planting date and plant density. Four field experiments were carried out to investigate and explain the effect of planting date and plant density on yield and its components in the old land and new reclaimed soil. White lupin Giza-1 variety was planted in a split-plot design with four replicates, in the four experiments, at the Research stations of Shandaweel representing the old land and Ismailia representing the new land. The experimental treatments were three planting dates (1st, 15th and 30th of November) and four plant densities (11, 17, 22 and 33 plants/m2). Simple correlation and stepwise regression analysis were used to find out the relationship between yield and its components and to assess their relative contributions to the seed yield. At Shandaweel, delaying planting date from 1st up to 30th of November significantly decreased all the studied characters. Increasing plant density up to 22 plants/m2 significantly increased plant height and seed yield/fed. Number of pods and seed yield/plant were significantly decreased by increasing plant density from 11 up to 33 plants/m2, whereas 100 seed weight significantly increased by increasing plant density up to 33 plants/m2. Density of 11 plants/m2 gave the highest values for number of branches/plant and number of seeds/pod. Interaction between planting dates and plant densities was not Significant regarding all the studied characters. At Ismailia, the studied characters were significantly affected by planting date, giving their highest values by planting lupin early on 1st of November. Plant density significantly affected all the studied characters except 100-seed weight. Seed yield/fed and plant height were significantly increased by increasing plant density from 11 up to 33 plants/m2 . Number of branches, pods and seed yield/plant were significantly decreased by increasing plant density. The highest number of seeds/pod was recorded by planting 11 plants/m2. The studied characters were significantly affected by the interaction of planting date X plant density except number of branches/ plant. There was highly significant and positive correlation between seed yield/plant and each of plant height, number of branches, pods/plant and 100-seed weight at both Shandaweel and Ismailia. Number of pods/plant, 100-seed weight, number of branches/plant and number of seeds/pod were the most important contributing characters to the seed yield at Shandaweel (R2 = 72.99 %). At Ismailia, Number of pods/plant and plant height were accepted variables as significantly contributors to the variability of the seed yield (R2 = 82.11%). The results cleared that number of pods/plant was the most important character to the variation of seed yield where it accounted for 55.55 % and 80.36 % to the total variation in the seed yield at Shandaweel and Ismailia, respectively. | ||
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