Abstract:

To explore the effects of slow-release liquid nitrogen fertilizer as the nitrogen fertilizer before transplanting instead of tiller fertilizer on rice, the field experiment was conducted using ‘Huazheyou 210’ as the experimental variety. Two groups were established: the control group (CK), which received conventional fractional fertilization, and the treatment group (T), which was treated with slow-release liquid nitrogen fertilizer as the before transplanting nitrogen application instead of tiller fertilizer. The research aimed to evaluate the effects of these fertilization methods on the growth, yield and quality of rice. The results showed that the T treatment had no significant effect on the stem tiller number, SPAD value and morphological characteristics of rice when compared with CK. However, it significantly promoted the accumulation of aboveground dry matter during the middle and late growth stages and increased the root-shoot ratio in the early growth stage, thereby establishing a foundation for robust seedlings. Conversely, it reduced the root-shoot ratio in the middle and late growth stages, which contributed to the accumulation of aboveground biomass and laying a foundation for high yield. Although the T treatment resulted in a slight decrease in the effective panicle number, consequently, a marginally lower yield compared to CK, the difference was not statistically significant. Moreover, T treatment could significantly improve the processing quality, appearance quality and cooking taste quality of rice, but no obvious effect on the nutritional quality of rice. These results indicated that the application of slow-release liquid nitrogen fertilizer as nitrogen fertilizer before transplanting instead of tiller fertilizer can achieve the purpose of saving labor, cost, and being efficient on the premise of ensuring yield and quality.

Key words: rice, slow-release liquid nitrogen fertilizer, nitrogen fertilizer before transplanting, tiller fertilizer, growth, yield, quality