Effect of variety and planting dates on mungbean green pod and dry seed yields

Abstract

In order to determine the impact of different planting dates on mungbean varieties as double purpose crop for vegetable and seed yields, field trials were conducted in clay soil in Qalubia governorate, during 2017 and 2018 summer seasons. Kawmy-1 and V2010 varieties were sown at 5 dates every two weeks namely, 15/5 (D1), 1/6 (D2), 15/6 (D3), 1/7 (D4) and 15/7 (D5). The results showed that Kawmy-1 surpassed V2010 in plant height, no. of pods palnt^-1, seed yield plant^-1 as well as seed yield ha^-1 in the 1^st and 2^nd harvests at 80 and 100 days after sowing respectively and total seed yield ha^-1. Regardless planting date Kawmy-1 was earlier in 50% flowering period and produced > 50% of sed yield plant^-1 and seed yield ha^-1 of the total seed yield at the 1^st harvest (80 days after sowing) compared with V2010. There were not significant effects among different planting dates in flowering until 1/7 planting date (D4) thereafter, the flowering duration was significantly shortened. Plant height was not affected till 1/6 planting date (D2) thereafter, it was gradually declined. The best seed yield ha^-1 was attained at 15/5 and 1/6 planting dates (D1 and D2), and in the subsequent planting dates it reduced gradually in the later planting dates. The planting date 15/5 (D1) gave the highest seed yield ha^-1 and surpassed D2 without significant differences among D2 and D3, D4 and D5 in the total seed yield ha^-1. The interaction between variety and planting date showed that Kawmy-1 was superior in seed yield ha^-1 when it was sown either in D1 (15/5) or D2 (1/6) followed by V2010 when it was planted at D1. The results of mungbean as vegetable crop indicated that Kawmy-1 variety produced greater green pods yield than V2010. Gradual reductions in green pods yield as planting date retarded and the best green yield pods was reported at D1 planting date. Regarding the interaction effect between variety and planting date on green yield pods, the results showed that the best planting dates were D1 and D2 for both varieties to produce the greatest green pods yield. It could be concluded that mungbean could be used as double purpose crop ether for green pods or dry seed which permits this crop to expand its uses under Egyptian conditions. The results emphasized that mungbean is among the most temperature sensitive crops and its production could fluctuate with a slight change in temperature due to planting dates which could be observed from the lower yields in the later planting dates compared with the best planting date D1.

Keywords

• Mungbean,dual usage,planting dates,temparature,yield characteristics

References

1. Ref 1 Prof Dr Mohamad Omar KabeshField Crop Research Dep NRCEgypt
2. Ref 2 Prof Dr Saad Hassan Abou KhadrahKafr El Sheikh UnivFaculty of Agric ,Egypt