The effects of Mungbean residue on growth and yeild of direct-seeded rice in Rice-Mungbean mixed cropping in flooed soil

บทคัดย่อ

The greenhouse experiment was conducted at the Field Crop Station Department of Plant Science and Agriculture Resource Khon Kaen University in 2002. The objective of this study was to investigate the effect of mungbean residue from flooding at different growth stages on growth and yield of direct-seeded rice. A completely randomized design was used. The treatments comprised of (i) sole rice, (ii) rice-mungbean mixed cropping and flooding at vegetative stage of mungbean, (iii) ricemungbean mixed cropping and flooding at flowering growth stage of mungbean, and (iv) rice-mungbean mixed cropping and flooding at pod filling growth stage of mungbean. The results showed that mungbean residue had significant effects on heights, tiller numbers, and grain yields of rice at harvest. Ricemungbean mixed cropping and flooded mungbeans at flowering growth stage gave the highest grain yield. However, the yield was not significantly different from that obtained from the rice-mungbean mixed cropping and flooding at mungbean vegetative growth stage and sole rice pot.