Some statistical methods to detect the behaviour between yield and its components under different densities in faba bean [electronic resource].

Includes references.

Two field trials were carried out at Sids Agricultural Research Station Bein Suef governorate during 2002 /2003 and 200312004 seasons to estimate the relative contributions between yield and its components for taba bean (Giza 2) as affected by different densities (27, 33, 40 plantlrn2). The used statistical procedures were simple correlation, multiple regression and stepwise regression analysis. The third density (40 plant/m²) recorded the highest mean compared with 33 and 27 plant/m² for plant height. On the other hand, the first density 27 plant/m² recorded the highest means for weight of 100 seeds and weight of seeds/plant. Results for combined analysis presented significant difference between years and seed yield/plant. plant height and number of pods. The interaction between years and plant populations were significant for number of pods/plant and number of seeds/pod. On the other hand, this relation was not significant for other traits and this result indicated that some characters were more affected by environmental conditions than others. Correlation coefficient values cleared highly significant positive correlation between seed yield /plant. and No. of pods and weight of 100 seeds for first density. Also highly significant positive correlation was found between seed yield/plant and plant height , number of branches and weight of 100 seed for second density. Results also cleared highly significant positive correlation between seed yield/plant and plant height and No. of pods for third density. The relation between seed yield is changing with change plant densities. Multiple regression analysis results recorded 77.7%. 92.9% and 97.8 % for 27, 33 and 40 plantlm2 from the total variation of seed yield/plant, respectively. Stepwise regression analysis accepted weight of 100 seeds and plant height with R² being 30.8% and 35.3% in 27 plant/m², plant height. weight of 100 seeds, No. of pods and No. of branches with relative contributions (R²) of 65.7% ,14.8 % ,6% and 5.7 % in 33 plant/m² and selected plant height and No. of pods with relative contributions of 81.7 % and 10.1% in 40 plant/m² from the total variation of seed yield /plant , respectively . These results also indicated that the variables which having contributions were changing with change plant densities.

Summary in Arabic.

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