Assessing the effectiveness of SA02 bio-organic fertiliser on crops in Sayaboury province, Laos

Abstract

This article presents the results of the effects of bio-organic fertiliser (BOF SA02) on the productivity of green vegetables, rice, Thai tangerine and rubber in Sayaboury province, Lao People’s Democratic Republic (PDR). Experimental results show that, for vegetables, the productivity of the experimental formula (2 tons of BOF SA02+160 kg NPK 15.15.15+96 kg
urea/ha) achieved 31,220 kg/ha, an increase of 6,150 kg/ha compared to the control formula (200 kg NPK 15.15.15+87 kg urea/ha), yield increased by 24.5%. For rice, the productivity of the experimental formula (2 tons of BOF SA02+213.6 kg NPK+34.8 kg urea/ha) achieved 5,920 kg/ha, an increase of 1,400 kg/ha compared to the control formula (267 kg NPK
15.15.15+43.5 kg urea/ha), bumper productivity reached 30.1%. For Thai tangerine trees, the productivity of the experimental formula (4 tons of BOF SA02+800 kg NPK 15.15.15+156.8 kg urea/ha) reached 11,186 kg/ha, an increase of 1,961 kg/ha compared to the control formula (1 ton of manure+200 kg NPK 15.15.15/ha), bumper productivity reached 21.3%. For rubber, the fresh latex productivity of the experimental formula (2 tons of BOF SA02+200 kg NPK 15.15.15+59.2 kg urea/ha) reached 960 kg/ha, an increase of 195 kg/ha compared to the control formula (253 kg NPK 15.15.15+74 kg urea/ha), bumper productivity reached 25.5%. In general, during the experiment, some main pests and diseases appeared on the plants, but thanks to timely detection and treatment, they did not affect plant growth, development, and productivity.