This study was conducted to evaluate four hybrid poplar comparison tests along a groundwater availability gradient in Western Slovakia. The weather fluctuation during the 3-year study period was described with indices, such as the Forestry Aridity Index (FAI) or the hydrothermal coefficient (HTC). The soil chemical and physical parameters were determined from soil samples from the two upper horizons. The nutrient status and supply of the trees were categorized based on leaf elemental analysis. Altogether, 21 different clones from 6 genomic groups were compared. The survival (SRV), diameter at breast height (DBH), and height of the trees (H) had been measured annually since the plantations were established, and from these measurements, mean annual height increment (MAHI) values were derived. These weather, edaphic, and clonal factors were evaluated and compared. Significant effects of the site (edaphic factors) were found as the primary source of variance and clonal differences as secondary sources of variance among the growth of trees. The interaction of site × clone effects was not significant. The results showed that for short rotation forestry (SRF), the site parameters—especially groundwater availability—are key factors.

本研究旨在评估斯洛伐克西部沿地下水可用性梯度的四种杂交杨树比较试验。用林业干旱指数（FAI）或热液系数（HTC）等指数描述了三年研究期间的天气波动。土壤化学和物理参数是从两个上层的土壤样品中确定的。基于叶元素分析对树木的营养状况和供应进行分类。总共比较了来自 6 个基因组组的 21 个不同克隆。自种植园建立以来，每年都会测量存活率 (SRV)、胸径 (DBH) 和树高 (H)，并根据这些测量结果得出平均年高度增量 (MAHI) 值。这些天气，土壤，和克隆因子进行了评估和比较。发现地点的显着影响（土壤因素）是变异的主要来源，而克隆差异是树木生长变异的次要来源。位点×克隆效应的相互作用不显着。结果表明，对于短轮伐林业 (SRF)，场地参数——尤其是地下水可用性——是关键因素。