首页> 外文会议>24th European biomass conference: setting the course for a biobased economy >ASSESSMENT OF SOIL ORGANIC CARBON CAPTURE OF GIANT REED AND POPLAR SRC WITH FOUR DIFFERENT N-FERTILIZATION REGIMES
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ASSESSMENT OF SOIL ORGANIC CARBON CAPTURE OF GIANT REED AND POPLAR SRC WITH FOUR DIFFERENT N-FERTILIZATION REGIMES

机译:四种不同施肥方式对巨型芦苇和杨树SRC土壤有机碳含量的评估

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The amount of SOC accumulated or released by the soil is a central issue in the sustainability of energyrncrops. The purpose of this study was to assess whether and how different N fertilization regimes influence SOCrncapture and total soil N content of two energy crops: the herbaceous perennial giant reed (Arundo donax L.) and thernwoody perennial hybrid poplar (Populus x canadiensis Moench) short rotation coppice (SRC). To explore this issue,rntwo field experiments were conducted for 5 years in the low Po Valley, Northern Italy. Treatments annually appliedrnwere: ⅰ) no fertilization (control); ii) industrial fertilizers (IF), corresponding to 120 kg N ha~(-1) year~(-1), +52 kg P ha-1 ⅲ)rncattle slurry 10 mm, i.e., 10 L m~(−2) (CS10); and (iv) cattle slurry 20 mm, i.e., 20 L m~(−2) (CS20). The main conclusionsrnare: ⅰ) the role of the perennial crops in increasing SOC is predominant compared to fertilization; ⅱ) both giant reedrnand poplar accrued SOC not only in the most superficial soil layers, but also in the deeper layer 0.4-0.6 m; ⅲ) poplarrntends to enrich total N content in the soil even if not fertilized, while giant reed does not.
机译:土壤累积或释放的SOC量是能源作物可持续性的一个中心问题。这项研究的目的是评估不同的氮肥施用方式是否以及如何影响两种能源作物的SOC捕获和土壤总氮含量:草本多年生巨芦苇(Arundo donax L.)和Thernwoody多年生杂交杨(Populus x canadiensis Moench)短旋转副本(SRC)。为了探讨这个问题,在意大利北部的低谷地区进行了为期5年的两次野外试验。每年使用的治疗方法是:ⅰ)不施肥(对照); ii)工业肥料(IF),相当于120 kg N ha〜(-1)年〜(-1),+ 52 kg P ha-1 rn牛浆10 mm,即10 L m〜(−2) (CS10); (iv)20mm的牛粪浆,即20 L m〜(-2)(CS20)。主要结论是:ⅰ)与施肥相比,多年生作物在增加有机碳中的作用占主导地位; ⅱ)不仅在最表层土壤层,而且在更深层0.4-0.6 m,巨型芦苇和杨树的SOC都增加了; ⅲ)杨树即使不施肥也能增加土壤中的总氮含量,而巨型芦苇则不会。

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