Abstract

The factors affecting the plant biodiversity in organic (manure application) and conventional vineyards (variety “Agiorgitiko for both) in southern Greece were examined separately for each vineyard type. The index for plant biodiversity was chosen to be the Shannon one (SH). The Pearson correlation coefficients disclosed that the common factors in both vineyards types affecting the SH were the concentrations of the soil organic C and organic N, the nitrates –N, the available (Olsen) P, available Cu, exchangeable K and the CaCO₃ percentage. The C/N ratio in soils affected positively and significantly the SH index in both vineyards types. That means that the supply of N is not a problem with regard to decomposition but the organic C as a source of energy can be a limiting factor to plant diversity. The earthworm population density in the two vineyards types was also a significant positive factor to the SH. The concentrations of the available Mg, Zn and ammonium-N in soils affected the SH index significantly only in the conventional vineyards although their concentrations in soils did not differ. We can conclude that chemical fertilization can also affect plant variability.

摘要

对于每种葡萄园类型，分别检查了希腊南部有机（施肥）和传统葡萄园（两者均采用“Agiorgitiko”品种）中影响植物生物多样性的因素。植物生物多样性指数被选为香农一（SH）。Pearson 相关系数表明，两种葡萄园类型中影响 SH 的共同因素是土壤有机 C 和有机 N 的浓度、硝酸盐 -N、有效 (Olsen) P、有效 Cu、可交换 K 和 CaCO ₃百分比。土壤中的 C/N 比对两种葡萄园类型的 SH 指数都有积极且显着的影响。这意味着 N 的供应对于分解来说不是问题，但作为能量来源的有机 C 可能是植物多样性的限制因素。两种葡萄园类型的蚯蚓种群密度也是对 SH 的一个显着的积极因素。土壤中有效镁、锌和铵态氮的浓度仅在常规葡萄园中显着影响 SH 指数，尽管它们在土壤中的浓度没有差异。我们可以得出结论，化学施肥也会影响植物的变异性。