马铃薯是孟加拉国的主要作物。该国的气候和土壤条件有利于马铃薯的生长发育,但单位面积产量很低(Karim 等,1980)。许多研究者曾报道过生长调节剂可控制马铃薯生长、薯块形成和产量(Bodlaender 等,1966;Krauss,1976;Bisaria,1977;Dimalla 等,1977;Kumar 等,1977和1979; Kumar 等,1981)。施用生长调节剂对薯块形成机制也有影响(Racca 等,1968;Kumar 等,1974)。Ito Potato is the main crop in Bangladesh. The country’s climate and soil conditions favor the growth and development of potatoes, but yield is low per unit area (Karim et al., 1980). Many investigators have reported that growth regulators control potato growth, tuber formation and yield (Bodlaender et al., 1966; Krauss, 1976; Bisaria, 1977; Dimalla et al., 1977; Kumar et al., 1977 and 1979; Kumar et al., 1981) . The application of growth regulators also has an effect on tuber formation (Racca et al., 1968; Kumar et al., 1974). Ito