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Mapping of arid-cultural systems for biomass production with low energetic input in marginal areas

机译：边际地区低能生物量生产的干旱文化系统制图

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In the last years, geographical Information System (GIS) has been used to identify the agro-climate suitability of different crops. Cynara cardunculus L. var. altilis, is a biomass plant suitable for cultivation with low energy input in Mediterraneanenvironment. In this work we studied the spatial correlation between biomass and productivity distribution and spatial feature of natural resources. Three years of experimental works (2011-2014) had been carried out in Porto Torres (SS), 40°48'59.45"N;8°20'49.94"E, Sardinia, using common agricultural practices and machinery. The evaluation of the field ground cover was performed by an aerial flight with 0.5 m spatial resolution (July 2014). The results were ortho-rectified from digital true color aerial photographs. All the data were geo-referenced using a metric Universal Transverse Mercator (UTM) coordinate system, Zone 32, E.D. 50. In order to assess the environmental suitability for cultivation under conditions of low energetic input and to ensure the field homogeneity and production, were considered different parameters, integrating spatial-structural characters with cultural practice. In the experimental field of 25 ha were identified, through sampling parcels of 9 m2, the correlations between variations of cover land, highlighted by the orthophotography analysis, and the variations field yields. It was possible to define four classes of ground cover that corresponding to different seeding density and crop yield, distributed as follows: 24%class 0 (without cardoon); 13% class 1 (<30%); 30% class 2 (30-50%); 34% class 3 (>50%). Was defined a real yield map and a potential yield map that displays the expected yield for the future of the crop in this area. The data collected will allow a specific crop management for planning fertilization between the different areas, considering the local variability of the physical, chemical and biological field.
机译：在过去的几年中，地理信息系统（GIS）已用于确定不同作物的农业气候适应性。 Cynara cardunculus L.var。 altilis是一种生物质植物，适合在地中海环境中以低能量输入进行栽培。在这项工作中，我们研究了生物量与生产力分布和自然资源空间特征之间的空间相关性。三年的实验工作（2011年至2014年）已经在撒丁岛东部40°48'59.45“ N; 8°20'49.94” E的Porto Torres（SS）进行，采用了常见的农业实践和机械。通过空间分辨率为0.5 m的空中飞行对野外地面覆盖物进行评估（2014年7月）。从数字真彩色航拍照片对结果进行了矫正。使用公制通用横轴墨卡托（UTM）坐标系统（E.D. Zone 32）对所有数据进行地理参考。 50.为了评估低能量投入条件下的种植环境适应性并确保田间均匀性和产量，人们认为它们是不同的参数，将空间结构特征与文化实践相结合。在25公顷的实验田中，通过9平方米的采样包，确定了正射影像分析强调的覆盖土地变化与变化田产量之间的相关性。可以定义与不同播种密度和农作物产量相对应的四类地被，分布如下：24％0类（无菜豆）; 1％的13％（<30％）; 30％2级（30-50％）; 34％3级（> 50％）。定义了实际产量图和潜在产量图，该图显示了该地区未来作物的预期产量。考虑到物理，化学和生物领域的局部差异，收集到的数据将允许特定的作物管理来计划不同地区之间的施肥。

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