Switchgrass biomass partitioning and growth characteristics under different management practices

Giannoulis, Kyriakos D.; Karyotis, Theodore; Sakellariou‐Makrantonaki, M.; Bastiaans, L.; Struik, P.C.; Danalatos, N.G.

doi:10.1016/j.njas.2016.03.011

Cited by 26 publications

(15 citation statements)

References 37 publications

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“…However, some studies did not find a significant influence of N fertilization on switchgrass biomass production, similar to our results [9,10,57,58]. Giannoulis et al [59] applied N fertilization from 0 kg N ha −1 , 80 kg N ha −1 , 160 kg N ha −1 to 240 kg N ha −1 to switchgrass at two locations over two years, and found that switchgrass Alamo dry yield was mostly not influenced by N fertilization (except two high N fertilization rates enhanced biomass compared to two low N at one site in one year). Thomason et al [60] reported that applying 0 N produced almost as much total biomass as 448 kg N ha −1 .…”

Section: Multiple Comparisons Of Biochar Addition and Nitrogen Fertilsupporting

confidence: 92%

Weak Effects of Biochar and Nitrogen Fertilization on Switchgrass Photosynthesis, Biomass, and Soil Respiration

Hui

Deng

et al. 2018

Agriculture

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Application of nitrogen (N) fertilizer plus biochar may increase crop yield, but how biochar will interact with N fertilization to affect bioenergy crop switchgrass physiology, biomass, and soil CO2 emission (i.e., soil respiration) from switchgrass fields remains unclear. Here, we assessed this issue by conducting a field experiment near Nashville TN with two levels of biochar treatment (a control without biochar addition and biochar addition of 9 Mg ha−1), and four N fertilization levels (0 kg N ha−1, 17 kg N ha−1, 34 kg N ha−1, and 67 kg N ha−1, labeled as ON, LN, MN, and HN, respectively). Results showed that both biochar addition and N fertilization did not influence switchgrass leaf photosynthesis and biomass, but biochar addition enhanced leaf transpiration, and reduced water use efficiency. Soil respiration was reduced by biochar addition, but significantly enhanced by N fertilization. Biochar and N fertilization interactively influenced soil respiration and seasonal variation of soil respiration was mostly controlled by soil temperature. Our results indicated that switchgrass can maintain high productivity without much N input, at least for several years. The findings from this study are useful to optimize N fertilization and biochar addition in the switchgrass fields for maintaining relatively high productive switchgrass biomass while reducing soil CO2 emission.

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Section: Multiple Comparisons Of Biochar Addition and Nitrogen Fertilsupporting

confidence: 92%

Weak Effects of Biochar and Nitrogen Fertilization on Switchgrass Photosynthesis, Biomass, and Soil Respiration

Hui

Deng

et al. 2018

Agriculture

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“…Similar values were reported for switchgrass seedlings in a growth chamber (1.45 to 5.5 mg per g) [41]. The value of WUE for switchgrass ranged from 4.7 to 7.9 during the boot or heading stages when calculated as the ratio of biomass to total water applied and precipitation during the irrigation experiment [49]. The high WUE values for lowland varieties allow for increased yields in southern locations where water is often limiting.…”

Section: Calculating Wue With the Almanac Modelsupporting

confidence: 73%

A Review of Modeled Water Use Efficiency of Highly Productive Perennial Grasses Useful for Bioenergy

Kiniry

Kim²

2020

Agronomy

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Whole plant productivity is obviously the ultimate product of leaf photosynthesis and this has led to numerous efforts to relate the two. However, often with perennial grasses, plant productivity is more sink-limited than source-limited, causing the linkage between the photosynthetic rate and productivity to be weak or nonexistent. This has led to a different approach, characterizing plant productivity in terms of the efficiency of intercepted light use in producing biomass, also called radiation use efficiency. Likewise, the efficiency of the use of water to produce plant biomass, or water use efficiency, has been the object of much interest. The use of a simulation model to quantify biomass, using radiation use efficiency in parallel with a daily water balance simulation, allows for the effective calculation of water use efficiency. In this project, the process of determining radiation use efficiency with field data is described, as well as example values for highly productive perennial grasses useful for feedstock for bioenergy. In addition, values of water use efficiency for these grasses are reported and compared with other perennial grasses and common cultivated crops.Water requirements for growing switchgrass and giant miscanthus are often an issue. Without adequate water, their biomass yields can be reduced by 45%-80% of total biomass yields [10,11]. Moreover, competition for water with other users makes maximizing water use efficiency vitally important. Again, process-based simulation models are valuable tools since they simulate the dynamics of crop water use based on evaporation of soil water, leaf transpiration, weather, and dynamics of plant communities. Quantifying Photosynthetic Performance via Two Approaches: Single Leaf Photosynthesis vs. Radiation Use Efficiency (RUE)There are many plant simulation models based on single leaf photosynthesis, which is then scaled up to the whole leaf canopy. Such models, such as ORYZA for rice (Oryza sativa L.) [12,13], are based on the assumption that photosynthesis is a major driver and determinant for whole plant productivity. However, frequently grass systems have been shown to be more sink-limited than source-limited. They often rely more on the processes of tiller production, leaf development, and leaf canopy orientation.Examples:

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“…As it was indicated in previous water stress experiments in switchgrass (Barney et al, 2009;Vamvuka et al, 2010), reductions were observed in switchgrass biomass yields with water stress, however, plants were able to survive under the most severe stress conditions, even in rain-fed conditions (S4 and S5) and able to have certain biomass yields (Table 3). Similarly, Giannoulis et al (2016) conducted an experiment under irrigated and rain-fed conditions and they reported that dry biomass yield as 14300 kg ha -1 under irrigated conditions and as 9200 kg ha -1 under rain-fed conditions. In this present experiment, Alamo, Kanlow and Trailblazer varieties were prominent for biomass yield under water stress and rain-fed conditions.…”

Section: Figure 2 Yield Reduction Ratios In the First Harvestmentioning

confidence: 99%

EFFECTS OF DIFFERENT WATER STRESS LEVELS ON BIOMASS YIELD AND AGRONOMIC TRAITS OF SWITCHGRASS (Panicum virgatum L.) CULTIVARS UNDER ARID AND SEMI-ARID CONDITIONS

Gönülal¹,

Soylu²,

Şahin³

2021

Turkish Journal of Field Crops

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This experiment was conducted to determine the effects of different water stress levels on biomass yield, plant height, number of stalks per meter, single stalk weight, yield reduction ratios and irrigation water use efficiency (IWUE) values of switchgrass (Panicum virgatum L.) varieties under Central Anatolia conditions. The study was conducted for two years (2016 -2017) in the Randomized Complete Block Design arranged in split plots with three replications under Konya ecological conditions. Six switchgrass varieties (Shelter, Alamo, Cave in rock, Shawnee, Kanlow and Trailblazer) and five different irrigation treatments (water stress levels: S1: Full irrigation; S2: 75% of full irrigation; S3: 50% of full irrigation; S4: 25% of full irrigation and S5: Rain-fed without irrigation) were used in this experiment. Kanlow, Alamo and Trailblazer varieties had greater biomass yields than the other varieties in all water stress treatments. Under different water stress treatments, dry biomass yields varied between 48300 kg ha-1 (S5-Cave in rock) and 25120 kg ha-1 (S1-Kanlow); plant heights varied between 70 cm (S5) and 180 cm (S1); number of stalks per meter varied between 221 (S5) and 356 (S1); single stalk weights varied between 0.56 g (S5) and 2.25 g (S1). IWUE was calculated as 5.7 kg m-3 for the first harvest and as 2.1 kg m-3 for the second harvest. Considering the biomass yields from single harvest of rain-fed treatments (S5) and two harvests of the other irrigation treatments (S1-S4), IWUE values and water deficits of the region, it was concluded that single harvest was more suitable for switchgrass plants grown under ecological conditions.

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Switchgrass biomass partitioning and growth characteristics under different management practices

Cited by 26 publications

References 37 publications

Weak Effects of Biochar and Nitrogen Fertilization on Switchgrass Photosynthesis, Biomass, and Soil Respiration

Weak Effects of Biochar and Nitrogen Fertilization on Switchgrass Photosynthesis, Biomass, and Soil Respiration

A Review of Modeled Water Use Efficiency of Highly Productive Perennial Grasses Useful for Bioenergy

EFFECTS OF DIFFERENT WATER STRESS LEVELS ON BIOMASS YIELD AND AGRONOMIC TRAITS OF SWITCHGRASS (Panicum virgatum L.) CULTIVARS UNDER ARID AND SEMI-ARID CONDITIONS

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