Kan suksa kan top sanong khong thualisong samphan to kan khluk chua rhizobium doi chai withi N-15 isotope dilution technique.
1988
Banyong Toomsan | Viroj Moasaen | Nilubol Tiengtae
Inoculation with Rhizobium significantly increased dry stover and dry pod yields. Cultivars differed in nodule number per plant at 60 DAP, dry stover yield, and final pod yield. Significant interactions between location and cultivar were also found for plant dry weight at 60 DAP. Plant dry weight of Moket was highest at KKU but lowest at Tha Phra. Locations had significant effected almost all parameters measured in seed, but for the parameters measured in stover only percentage of N content showed a significant difference between the two locations. Differences among cultivars were observed for seed N yield per plant, percentages of nitrogen derived from the air (% Ndfa) in seed, stover N yield per plant, percentages of nitrogen derived from the air (% Ndfa) in stover, and amount of N fixed in stover. Rhizobium inoculation treatments significantly differed only in seed N yield per plant and percentages of nitrogen derived from the air (% Ndfa) in seed. The amount of N fixed was 9.99, 9.09 and 12.71 kg. N/rai for groundnut cultivars Tainan 9, Moket and KAC 431, respectively. About 40 % of the fixed N were translocated to seeds in groundnut cultivars Tainan 9 and Moket, but only about 24 % were translocated to seeds in groundnut cultivars KAC 431. The amount of the fixed N left in the stover ranged from 60 to 76 % depending on cultivars. Uninoculated groundnut fixed 9.18 kg. N/rai with 32 % translocated to seeds, while the inoculated groundnut fixed 11.30 kg. N/rai with 35 % translocated to seeds.
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