Effect of Juvenile Leaf Removal on Symbiotic N Fixation and Yield of Mungbean (Vigna radiata (L.) Wilczek)

บทคัดย่อ

A randomized complete block design with 3 replications was conducted on Bangkhen soil series at Kasetsart University, Bangkhen campus in the early rainy season of 1994. The treatments composed of 0, 33, 66 and 100% juvenile leaf removal of mungbean at the V 4 stage. The results indicated that the higher the degree of leaf removal, the lesser the nodule number, nodule dry weight, symbiotic N fixation, total dry weight and seed yield were expected. Number of pods per plant was the only yield component that had a main effect on yield. The loss on 33% juvenile leaves was not as severe as those of the 66 and 100% in terms of seed yield when compared to the control.