Field evaluation of N(sub 2) fixation by seventeen mung bean genotypes in the Philippines

摘要

Seventeen mung bean genotypes were screened for biological nitrogen fixation (BNF) during the late dry (March-May) and early dry (October-December) seasons of 1992 in the Philippines. The (sup 15)N isotope dilution method was used to measure N(sub 2) fixation. Performances were quantified based on both indirect and direct measurements of N(sub 2) fixation. Genetic variation was observed among varieties tested for some BNF characteristic. However, genetic variability for percent N derived from fixation (%Ndfa) was not evident. PAEC 3 mutant, Taiwan Green, Acc 687 and Pagasa 7 were the best performers. Whereas Acc 2041 consistently performed poorly for most of the BNF characters tested. (author). 14 refs., 1 fig., 2 tabs. (Atomindex citation 26:071179)