Nitrogen fertilization of high biomass sorghum affects macro- and micronutrient accumulation and tissue concentrations

Maw, Michael J.W.; Houx, James H.; Fritschi, Felix B.

doi:10.1016/j.indcrop.2020.112819

Cited by 10 publications

(20 citation statements)

References 39 publications

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“…A substantial environmental impact on tissue nutrient concentrations shown in this study was also observed in several studies [29,34,42–45]. The decline in N concentrations was usually corresponding to the increase in biomass yield, which was attributed to the effect of a growth dilution [42,45,46]. This dilution effect on P and K concentrations, however, was not observed in this study, which was also reported by Maw et al (2020) [45].…”

Section: Discussionsupporting

confidence: 89%

“…The N removal in TX (~0.2 kg N ha -1 uptake per 1.0 kg N input) was similar in several reports [29,34,56]. In TX, the increased K removal with increasing N input was a result of the DM biomass accumulation [45]. The feedstock compositions were less influenced by different N rates compared to the biomass yield, which is similar to several studies [20,57,60,61].…”

Section: Nitrogen Effects and Use Efficiencysupporting

confidence: 89%

“…This study showed that increased N input led to an increase in biomass N concentrations, which was often reported in many studies [34,44,56,58]. The improved biomass yield due to N supply can dilute P and K in plant tissue and lower their concentrations, which was only observed for tissue K concentrations in IL [44,45,56].…”

Section: Nitrogen Effects and Use Efficiencysupporting

confidence: 61%

“…The decline in N concentrations was usually corresponding to the increase in biomass yield, which was attributed to the effect of a growth dilution [42,45,46]. This dilution effect on P and K concentrations, however, was not observed in this study, which was also reported by Maw et al (2020) [45]. Compared to IL, the higher soil K content in TX, showing approximately 4-fold soil K (Table 2), likely resulted in an increase in biomass K concentrations for all hybrids (Table 5).…”

Section: Discussionmentioning

confidence: 99%

“…Although the four PS hybrids had similar N requirements, the TX17500 showed a higher stover P concentration/requirement than the other hybrids. The high biomass sorghum hybrids with lower tissue nutrient concentrations, usually along with lower nutrient removal, have more sustainable benefits for the cropping system [45,51].…”

Section: Hybrid Comparisonsmentioning

confidence: 99%

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Photoperiod Sensitive Energy Sorghum Responses to Environmental and Nitrogen Variabilities

Schetter

Lin

Zumpf

et al. 2020

Preprint

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Recently introduced photoperiod-sensitive (PS) biomass sorghum (Sorghum bicolor L. Moench) needs to be investigated for their yield potentials under different cultivation environments with reasonable nitrogen (N) inputs. The objectives of this study were to 1) evaluate the biomass yield and feedstock quality of four sorghum hybrids with different levels of PS ranging from very PS (VPS) hybrids and to moderate PS (MPS) hybrids, and 2) determine the optimal N inputs (0~168 kg N ha-1) under four environments: combinations of both temperate (Urbana, IL) and subtropical (College Station, TX) regions during 2018 and 2019. Compared to TX, the PS sorghums in central IL showed higher yield potential and steady feedstock production with an extended daylength and with less precipitation variability, especially for the VPS hybrids. The mean dry matter (DM) yields of VPS hybrids were 20.5 Mg DM ha-1 and 17.7 Mg DM ha-1 in IL and TX, respectively. The highest N use efficiency occurred at a low N rate of 56 kg N ha-1 by improving approximately 33 kg DM ha-1 per 1.0 kg N ha-1 input. Approximately 70% of the PS sorghum biomass can be utilized for biofuel production, consisting of 58-65% of the cell wall components and 4-11% of the soluble sugar. This study demonstrated that the rainfed temperate area (e.g., IL) has a great potential for the sustainable cultivation of PS energy sorghum due their observed high yield potential, stable production, and low N requirements.

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