1. TRANG KIEN BUSH - Branch of Crop Production and Plant Protection Kien Giang province, Vietnam.
2. NGUYEN VAN CHUONG - Associate Professor, department of Crop Science, Agricultural Faculty of An Giang University-VNU, HCM
city, Vietnam.
Association of rice husk biochar, sawdust and Priestia aryabhattai M2C inoculant can impact on soil chemical compositions, yield components and the yield and arsenic accumulation of the soybean. The experimental design had all five treatments, which consisted of SB1(20N-30P-40K kg/ha); SB2 (20N-30P40K kg/ha+Priestia aryabhattai M2C inoculant); SB3 (20N-30P-40K kg/ha+ Priestia aryabhattai M2C inoculant + 10 tons sawdust/ha); SB4 (20N-30P-40K kg/ha + Priestia aryabhattai M2C inoculant + 10 tons rice husk biochar /ha) and SB5 (20N-30P-40K kg/ha+ Priestia aryabhattai M2C inoculant + 5.0 tons rice husk biochar /ha +5.0 tons sawdust/ha) and four replications. Studied results showed that application of the rice husk biochar, sawdust amendment combined with Priestia aryabhattai M2C inoculant drastically raised the soil pH and lessened soil acidity. Furthermore, results also proved that amended treatments of rice husk biochar, sawdust combined with Priestia aryabhattai M2C inoculant significantly raised the agronomy and lessened the As uptake of soybean. In three amended treatments (SB3, SB4 and SB5) of Priestia aryabhattai M2C inoculant combined with rice husk and/or sawdust biochar was better in plant hights, tillers; pod number, pod weight, biomass and weight of 1,000 seeds. Yield and as uptake of soybean were also significantly affected by rice husk biochar, sawdust biochar application and Priestia aryabhattai M2C inoculant at five trials. Amendment of SB5, which produced the highest value of yield (2.15 tons/ha), was higher 25.1% than that of SB1 treatment (1.6 tons/ha). The sawdust amendment treatment (SB3) was the minimum as accumulation of roots, sterms and seeds in soybean in five trials. In general, addition of Priestia aryabhattai M2C inoculant (SB2) was better than SB1 (NPK application only) in all properties of cultivation soil and growth, yield, as accumulation in soybean.
Arsenic, Priestia aryabhattai M2C, rice husk biochar, sawdust, soybean.