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Effects of different site preparation methods on the root development of planted Quercus petraea and Pinus nigra
New forests ( IF 2.2 ) Pub Date : 2020-02-15 , DOI: 10.1007/s11056-020-09781-7
Mathieu Dassot , Catherine Collet

Mechanical site preparation (MSP) is often performed prior to planting to improve the growth and survival of planted seedlings. In this study, we compared root development of 5-years-old Quercus petraea and Pinus nigra seedlings planted in plots that had been prepared with different methods, i.e. deep scarification, deep scarification combined with mounding-subsoiling, herbicide and a control without preparation. Seventy-two trees were excavated (36 per species) and their root system was measured by recording points in a three-dimensional space along their roots. The variation of the number of roots with depth and distance to root collar was assessed and analysed, as well as the root projection area. Our results showed that root development was better in the plots with mechanical preparation, for both Q. petraea and P. nigra, when compared to the control. Combining mounding to subsoiling made the roots extending deeper, especially for Q. petraea. A strong relationship was found between root projection area and root collar diameter, indicating the primary effect of lateral root spread on tree growth. The herbicide treatment induced the highest root growth, which raised questions about the potential negative effects of changes in soil properties caused by MSP methods.



中文翻译:

不同整地方法对白栎和黑松根系发育的影响

通常在种植前进行机械位准备(MSP),以改善种植幼苗的生长和存活。在这项研究中,我们比较了5岁栎木黑松的根系发育在用不同方法(即深层划痕,深层划痕与土堆深松,除草剂和未经准备的对照)联合准备的地块上种植的幼苗。挖出七十二棵树(每个树种36个),并通过在其根部的三维空间中记录点来测量其根系。评估并分析了根数随深度和到根颈距离的变化以及根投影面积。我们的结果显示,与对照相比,在机械准备的情况下,Q。petraeaP. nigra的根部发育更好。土墩与深松土的结合使根部更深,尤其是对Q. petraea。在根部投影面积和根部颈圈直径之间发现了很强的关系,这表明侧根扩散对树木生长的主要影响。除草剂处理诱导了最高的根系生长,这引发了人们对由MSP方法引起的土壤性质变化的潜在负面影响的质疑。

更新日期:2020-02-15
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