Phytoremediation of Pb contaminated paddy field using combination of Agrobacterium sp. I3, compost and ramie (Boehmeria nivea)

Abstract

Industry sector exerts a negative effect on the environment. Industrial waste is often disposed to the rivers. The industry contributes to the accumulation of heavy metals in the environment. In farming sector, the accumulation of heavy metals can result in water pollution and be washed into the ground. Therefore, the farming product can be contaminated with heavy metals and they can be harmful to human health. The objective of this research was to reduce the Pb heavy metal content in paddy soil. This research was taken place in the Pb contaminated paddy soil using a randomized complete block design with three factors and three replicates. This research employed combination of inorganic fertilizer, ramie and Agrobacterium sp. I 3 or compost as a chelator to improve Pb uptake. The results showed that combination of the three treatments increased Pb uptake. The combination of chemical fertilizers, ramie with compost increased the Pb uptake of 11.93 μg/g or 45.9%. The combination of chemical fertilizers, ramie with Agrobacterium sp. I 3 resulted in the highest Pb uptake of 12.85 μg/g or 49.8%. The combination also decreased the soil Pb level by 7.8 μg/g or 23.5% of the control.

POTENTIAL OF Rhizobium sp. I 3 AND Agrobacterium sp. I 3 7 IN FORMATION OF ROOT NODULES AND STIMULATING GROWTH OF Arachis hypogaea L.

“…Organic matter and nitrogen-fixing bacteria affect plant growth (Widawati & Suliasih, 2019). In addition, according to a study by Rosariastuti et al (2018) an increase in plant height followed by an increase in plant dry weight indicates good photosynthesis. Therefore, the higher the plant growth/height, the higher the dry weight or biomass of the plant.…”

“…However, it has a negative correlation with soil pH. Addition of organic fertilizers increases CEC and availability of soil N, P, and K. According to a study by (Rosariastuti et al, 2018), increase in CEC is caused by the addition of soil organic matter. Increased number of microbes capable of forming organic acids can reduce the pH value (Song et al, 2018).…”

“…Moreover, using mocaf waste overcomes waste disposal problem of tapioca flour industry (Rosariastuti et al, 2017). Manure and artificial media that have the potential to support the growth of live bacteria can also be used for carrier combination (Rosariastuti et al, 2018). This study aims to evaluate the potential of Rhizobium sp.I3 and Agrobacterium sp.I37 in producing nodules to stimulate the growth of peanut plant.…”

Study of potential plant of Biduri (Calotropis gigantea) with combination of bacteria, organic matter, and inorganic fertilizer for bioremediation of lead (Pb) contaminated soil

“…Biduri is a drought-resistant, salt-tolerant plant and grows wild [11]. Based on the results of research by [12], the use of Agrobacterium sp increased Pb absorption by 84,8%-99,2% in hemp plants in Ngringo Village. Rhizobium sp.…”

Seasonal Nutrient Cycling and Enrichment of Nutrient-Related Soil Microbes Aid in the Adaptation of Ramie (Boehmeria nivea L.) to Nutrient-Deficient Conditions

“…Although optimizing cultivation techniques (e.g., fertilization or harvesting strategies) could reduce fertilizer input (Liu et al, 2012;Zeng et al, 2013), the breeding for varieties that can use nutrients efficiently and grow on poor soils will provide a more efficient and long-term solution. Additionally, given that ramie shows strong heavy metal tolerance and has a variety of nonfood uses (Rosariastuti et al, 2018;Lan et al, 2020), ramie could be grown in heavy metal-contaminated soil (Neilson and Rajakaruna, 2014;Zheng J. et al, 2019). Heavy metal-contaminated soils (mainly in mining areas) are generally characterized by poor fertility (Mensah, 2015;Lwin et al, 2018).…”