Hybrid Napier grass as a candidate species for bio-energy in plant-based water treatment systems: Interactive effects of nitrogen and water depth

Pincam, Tararag; Brix, Hans; Eller, Franziska; Jampeetong, Arunothai

doi:10.1016/j.aquabot.2017.01.001

Cited by 15 publications

(9 citation statements)

References 21 publications

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“…With regard to the forage grass fields, a hybrid Napier grass ( Pennisetum americanum (L.) Leeke × Pennisetum purpureum Schumach) were planted. This grass is widely planted as a perennial fodder crop owing to its high productivity and protein content (48–50 kg m −2 yr −1 with dry mass accounting for 0.18–0.19) and high palatability (Pincam, Brix, Eller, & Jampeetong, ). The dominant tree species in the forests were Cladrastis platycarpa , Cryptocarya chinensis , Liquidambar formosana , and Eurycorymbus cavaleriei .…”

Section: Methodsmentioning

confidence: 99%

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Liu

Chen

et al. 2018

Land Degrad Dev

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Whether conservation agriculture systems can increase soil organic carbon (SOC) and total nitrogen (TN) pools remains unresolved. We measured SOC and TN pools in maize–soybean rotation fields and three types of conservation agriculture systems with mature forests being selected for comparison in southwest China's karst areas. The three types of conservation agriculture systems were fields of mulberry, forage grass, and sugarcane. The objective was mainly to evaluate whether replacement of maize–soybean fields by the other three types of agricultural fields would significantly increase SOC and TN pools. Across the 0–30 cm soil profile, SOC and TN pools were not significantly higher in the mulberry and sugarcane fields than in the maize–soybean fields (47.42 ± 6.34 Mg C ha−1 and 5.47 ± 0.49 Mg N ha−1). Nevertheless, SOC and TN pools in the forage grass fields (74.12 ± 5.30 Mg C ha−1 and 7.09 ± 0.41 Mg N ha−1) were higher by 56.3 and 29.4% relative to the maize–soybean fields, but were lower by 38.3% and 21.8% compared to the forests, respectively. Microbial biomass C (MBC) and N (MBN) concentrations varied in similar patterns as SOC and TN pools. The MBC:SOC and MBN:TN ratios were higher in the forage grass fields, suggesting increased soil organic matter quality compared to the other types of agricultural fields. Our findings suggest that whether conservation agriculture can enhance SOC and TN pools largely depends on crop type with forage grass cultivation being identified as an efficient solution to promote SOC and TN pools.

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Section: Methodsmentioning

confidence: 99%

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Liu

Chen

et al. 2018

Land Degrad Dev

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“…The forage grass fields were planted with hybrid Napier grass (Pennisetum purpureum Schumach × Pennisetum americanum (L.) Leeke), which is a hybrid between pearl millet (P. americanum (L.) Leeke) and Napier grass (P. purpureum Schumach). Hybrid Napier grass is widely used as a perennial fodder crop due to its fast growth, drought tolerance, high productivity (480-500 t·ha −1 ·yr −1 with 18-19% dry mass), high protein content, and high palatability (Pincam, Brix, Eller, & Jampeetong, 2017 Wen et al, 2016), because mature forests were absent in all the blocks. In total, 40 plots were included with eight plots for each of the five land use types.…”

Section: Study Region and Experimental Designmentioning

confidence: 99%

Soil microbial community responses to forage grass cultivation in degraded karst soils, Southwest China

Liu

Chen

et al. 2018

Land Degrad Dev

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Variation of soil microbial community abundance and structure has great implications for soil fertility and nutrient cycling. A better understanding of soil microbial community dynamics under different land use types is undoubtedly needed in order to develop sustainable land use schemes. The current study aimed to assess how soil microbial community changed after replacement of maize–soybean crop by sugarcane, mulberry, or forage grass crop in a karst area of Southwest China. Mature forests were included for comparison. Phospholipid fatty acid (PLFA) method was used to characterize soil microbial community abundance and structure. The abundances of total PLFAs and PLFAs of bacteria, fungi, actinomycetes, and arbuscular mycorrhizal fungi were significantly increased in the forage grass field but not in the sugarcane and mulberry fields relative to the maize–soybean field. Total PLFAs' abundance in the forage grass field was increased by 81% compared with that in the maize–soybean field but was about 52% lower than that in the forest. The microbial community structure was not distinguished as much as the microbial abundance among the five land use types. Soil organic carbon (SOC) was identified as the primary factor affecting both soil microbial abundance and structure. Soil microbial community abundance was positively correlated with SOC, but the ratios of fungal to bacterial PLFAs and Gram‐positive to Gram‐negative bacterial PLFAs were negatively correlated with SOC. Our findings suggest that the replacement of the maize–soybean rotation system by forage grass cultivation has the potential to improve soil fertility in the karst region, Southwest China.

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“…In case of treating wastewater from animal farms, the plant biomass can be safely utilized as animal fodder. However, if hazardous pollutants are removed from the water and taken up by the plant, the biomass cannot be safely used as animal fodder, but only for bioenergy production (Arslan Topal et al ., ; Pincam et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Removal of tetracycline antibiotic by Lemna gibba L. from aqueous solutions

Topal

Öbek

Şenel

et al. 2018

Water & Environment J

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In this study, the efficiency of Lemna gibba L. on tetracycline (TC) removal from the solutions prepared at various initial TC concentrations (50, 100 and 300 µg/L) was investigated. The study was conducted in the reactors planted with Lemna gibba L. plants. Lemna gibba L. plants in the reactors were harvested at various hydraulic retention times. Then, the concentrations of TC were determined by using LC/‐MS‐MS. The maximum removal efficiencies for the TC50, TC100 and TC300 in the planted reactors were 99.8 ± 4.1; 99.9 ± 4.9 and 99 ± 4.9%, respectively. The harvesting times for Lemna gibba L. at TC50, TC100 and TC300 concentrations were determined to be 12, 8 and 12 hours, respectively. First‐, second‐ and pseudo‐first‐order kinetics are determined in the planted reactors (with Lemna gibba L.). According to the study results, second‐order kinetics were obtained at TC50, TC100, TC300 concentrations. As a result, the Lemna gibba L. plant can be used as an alternative treatment method to other advanced treatment methods and it can be done with a cheap method by adapting to existing treatment plants. Lemna gibba L. plants can be used to remove pollutants by applying them to polluted lakes and water bodies.

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Hybrid Napier grass as a candidate species for bio-energy in plant-based water treatment systems: Interactive effects of nitrogen and water depth

Cited by 15 publications

References 21 publications

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Soil microbial community responses to forage grass cultivation in degraded karst soils, Southwest China

Removal of tetracycline antibiotic by Lemna gibba L. from aqueous solutions

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