Abstract:

Using Ruikangdun microbial inoculants as experimental materials, the effects of microbial inoculants on the growth, development, yield, and quality of autumn continuous cropping watermelon were studied. Using Jingjia 301 as the experimental object, conventional fertilization and clean water as the control CK, conventional fertilization and Ruikangdun microbial agent as the treatment T. After 10 days of each application of microbial agents, stem diameter, main vine length, number of leaves, internode length, and first female flower node position were determined; During the fruit harvesting period, the individual fruit weight was detected and the yield of the plot was calculated, then the yield of 667 m² was converted. The peel thickness, longitudinal diameter, and transverse diameter were measured, the fruit shape index was calculated, and the soluble solid content in the center and edge parts were measured. The results showed that Ruikangdun microbial inoculum could promote the growth of autumn continuous cropping watermelon plants to a certain extent. The average stem diameter, number of internodes, number of leaves, main vine length, and internode length of T plants were higher than those of CK plants. The yield increase effect is good, with a yield increase rate of 15.16%. The average peel thickness of the fruit increased by 6.90% compared with CK, and the soluble solid content in the center and edge parts increased by 1.2 percentage points and 0.1 percentage points respectively compared with CK. In summary, Ruikangdun microbial inoculum can promote the growth of autumn continuous cropping watermelon plants, increase yield, and improve fruit quality.

Key words: Ruikangdun microbial agent, autumn continuous cropping watermelon, yield, quality