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The Impact of Soil Water Content on Yield, Composition, Energy, and Water Indicators of the Bioenergy Grass Saccharum spontaneum ssp. aegyptiacum under Three-Growing Seasons

Scordia, D.; Calcagno, S.; Piccitto, A.; Cristina Patanè


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{
  "DOI": "10.3390/agronomy10081105", 
  "container_title": "Agronomy", 
  "language": "eng", 
  "title": "The Impact of Soil Water Content on Yield, Composition, Energy, and Water Indicators of the Bioenergy Grass Saccharum spontaneum ssp. aegyptiacum under Three-Growing Seasons", 
  "issued": {
    "date-parts": [
      [
        2020, 
        7, 
        30
      ]
    ]
  }, 
  "abstract": "<p>Raising water and energy productivity in agriculture can contribute to reducing the pressure&nbsp;on the limited freshwater availability and non-renewable energy sources. Bioenergy perennial grasses&nbsp;are ecient from a water perspective and can a ord a low-energy cultivation system; however, crop&nbsp;selection and cultivation practices for minimizing land use change and maximizing resource use<br>\neciencies remain a challenging task in view of sustainable bioeconomy development. The present&nbsp;work investigated the soil water e ect on a long-term plantation of Saccharum (Saccharum spontaneum&nbsp;ssp. aegyptiacum), a bioenergy perennial grass holding great promise for semiarid Mediterranean&nbsp;areas. The plantation was in its 13th year following establishment and was subjected to three levels of&nbsp;irrigation for three successive growing seasons. Regression models between crop water use (CWU)&nbsp;and productivity, biomass composition, energy, and water indicators showed di erent prediction&nbsp;curves. Raising CWU (from 230 to 920 mm) enhanced the dry biomass yield (from 14.8 to 30.1 Mg&nbsp;ha<sup>-1</sup>) and the net energy value (from 257.6 to 511 GJ ha<sup>-1</sup>). On the same CWU range, unirrigated&nbsp;crops improved the energy eciency (from 99.8 to 58.5 GJ ha\udbc0\udc001), the energy productivity (from 5.6&nbsp;to 3.4 Mg GJ<sup>-1</sup>) and the water productivity (from 114.5 to 56.1 MJ m\udbc0\udc003) by reducing the water&nbsp;footprint (from 8.7 to 17.8 m3 GJ<sup>-1</sup>). Biomass composition was also superior in unirrigated crops,&nbsp;as the lower heating value, structural polysaccharides, and the acid detergent lignin were higher,<br>\nwhile ash and soluble compounds were lower. Present findings demonstrated the good yield levels&nbsp;and persistence of Saccharum, improving our knowledge of plant responses to changing soil water&nbsp;availability to maximize energy and conserve natural resources, paving the way for sustainable&nbsp;bioeconomy development in the Mediterranean area.</p>", 
  "author": [
    {
      "family": "Scordia, D."
    }, 
    {
      "family": "Calcagno, S."
    }, 
    {
      "family": "Piccitto, A."
    }, 
    {
      "family": "Cristina Patan\u00e8"
    }
  ], 
  "page": "1105", 
  "volume": "2020", 
  "version": "V1", 
  "type": "article-journal", 
  "issue": "10", 
  "id": "4032379"
}
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