Abstract

The on-Farm Trials experiment was carried out on alluvial soil, with two models corresponding to two farming techniques: (i) Traditional fertilization, applying conventional fertilizers with the formula 92.2 N–82.8 P₂O₅ –22.8 K₂O kg/ha; (ii) New generation fertilizers (NPK-CRF, urea humate, and potassium humate) with the formula 50.1 N–39.9 P₂O₅ – 30.0 K₂O. Each pattern was repeated three times, corresponding to 3 farmers. Each household's area is 1,000m^2, cultivating continuously through three seasons of Winter-Spring (WS), Summer-Autumn (SA), and Autumn-Winter (AW) in Chau Thanh A district, Hau Giang province.

The results shows that the new generation fertilizer application significantly improved rice yield and yield composition of the Winter-Spring cropping season (6.92 tons/ha), Summer-Autumn (5.94 tons/ha), and Autumn-Winter (6.15 tons/ha), which are different from farmers' fields. With three replicates, each farm household is considered as one repetition, the area of ​​each repetition is 1,000m². Initial research results shows that the rice cultivation model in the experimental field not only brings high economic efficiency to farmers (increasing income by 9.64% per unit of cultivated area) but also helps to reduce a number of chemical fertilizers, improving the useful nutrients in the soil, reduce H⁺, Al³⁺ toxicity and increasing the density of soil microorganisms. Rice farming with the proposed model is in line with the trend of advanced farming, contributing to the building of a sustainable agriculture and advancing the development of a green agriculture.