N43 suppressed damping-off disease and significantly promoted the growth of cucumber plants. The lowest dry weight and length of shoots were found in the plants from the CK2 treatment, whereas the highest dry weight and length were found in those treated with BIO. Even in lower soil fertility, plants treated with N43 had higher dry weights and lengths than those from the OF treatment (Table 2). These data confirmed that the addition of N43 could significantly control damping-off disease and increase the dry weight and length of cucumber seedling shoots in protected cultivation systems.