Can the soil seed bank of Rumex obtusifolius in productive grasslands be explained by management and soil properties?

Rumex obtusifolius is a problematic weed in temperate grasslands worldwide as it decreases yield and nutritional value of forage. Because the species can recruit from the seed bank, we determined the effect of management and soil properties on the soil seed bank of R. obtusifolius in intensively managed, permanent grasslands in Switzerland (CH), Slovenia (SI), and United Kingdom (UK). Following a paired case-control design, soil cores were taken from the topsoil of grassland with a high density of R. obtusifolius plants (cases) and from nearby parcels with very low R. obtusifolius density (controls). Data on grassland management, soil nutrients, pH, soil texture, and density of R. obtusifolius plants were also collected. Seeds in the soil were germinated under optimal conditions in a glasshouse. The number of germinated seeds of R. obtusifolius in case parcels was 866 ±152 m-2 (CH, mean ±SE), 628 ±183 m-2 (SI), and 752 ±183 m-2 (UK), with no significant difference among countries. Densi..., Data were acquired from managed grasslands with and without Rumex obusifolius in the three countries Switzerland, Slovenia and UK following a common protocol. The selection of parcels was restricted to intensively managed, permanent grasslands relevant for forage production and established since at least five years. A paired case-control design was implemented: field parcels with high density of R. obtusifolius plants (cases) were identified and compared with nearby parcels with no or very few R. obtusifolius plants (controls). Measured variables include data on management type and intensity, grassland disturbance, regulation of R. obtusifolius, soil properties, and seeds of R. obtusifolius in the topsoil. Seeds of R. obtusifolius from the parcels' topsoil (0-10 cm) were germinated under optimal conditions in a glasshouse to determine the soil seed bank of the species.,

钝叶酸模（Rumex obtusifolius）是全球温带草原中的恶性杂草，会降低饲草的产量与营养价值。由于该物种可通过土壤种子库完成种群补充，本研究针对瑞士（CH）、斯洛文尼亚（SI）与英国（UK）的集约化管理永久草原，探究了管理措施与土壤性质对钝叶酸模土壤种子库的影响。本研究采用配对病例对照设计，从钝叶酸模植株高密度草原的表层土壤（病例组）以及邻近的钝叶酸模低密度地块（对照组）采集土芯。同时收集了草原管理措施、土壤养分、pH值、土壤质地以及钝叶酸模植株密度等相关数据。将土壤中的种子置于温室最优条件下进行萌发实验。病例组地块中钝叶酸模的萌发种子数分别为：瑞士866 ±152 粒·m⁻²（均值±标准误）、斯洛文尼亚628 ±183 粒·m⁻²、英国752 ±183 粒·m⁻²，各国间无显著差异。[原文此处存在截断]。本数据集采自上述三国具备/不具备钝叶酸模分布的人工管理草原，所有采样均遵循统一实验方案。地块选取限定于至少已建立5年、用于饲草生产的集约化管理永久草原。本研究采用配对病例对照设计：选取钝叶酸模植株高密度的田间地块作为病例组，与邻近无或极少量钝叶酸模的地块作为对照组进行比对。测定变量涵盖管理类型与强度、草原扰动情况、钝叶酸模防控措施、土壤性质以及表层土壤中的钝叶酸模种子。采集各地块0-10 cm表层土壤中的钝叶酸模种子，在温室最优条件下萌发以测定该物种的土壤种子库。