Stenchly Kathrin, Dao Juliane, Lompo Désiré Jean-Pascal, Buerkert Andreas
Universität Kassel, Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics (OPATS), Steinstrasse 19, D-37213 Witzenhausen, Germany.
Universität Kassel, Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics (OPATS), Steinstrasse 19, D-37213 Witzenhausen, Germany.
Environ Pollut. 2017 Mar;222:58-63. doi: 10.1016/j.envpol.2017.01.006. Epub 2017 Jan 16.
The usage of inadequately processed industrial waste water (WW) can lead to strong soil alkalinity and soil salinization of agricultural fields with negative consequences on soil properties and biota. Gypsum as a soil amendment to saline-sodic soils is widely used in agricultural fields to improve their soil physical, chemical and hence biological properties. This study aimed at analysing the effects of intensive WW irrigation on the structure and composition of soil-dwelling arthropods on spinach fields (Spinacia oleracea L.) in a West African urban vegetable production system. We used gypsum as a soil amendment with the potential to alleviate soil chemical stress resulting in a potentially positive impact on soil arthropods. A total of 32 plots were established that showed a gradient in soil pH ranging from slight to strong soil alkalinity and that were irrigated with WW (n = 12) or clean water (CW; n = 20), including eight plots into which gypsum was incorporated. Our study revealed a high tolerance of soil-dwelling arthropods for alkaline soils, but spinach fields with increased soil electrical conductivity (EC) showed a reduced abundance of Hymenoptera, Diptera and Auchenorrhyncha. Arthropod abundance was positively related to a dense spinach cover that in turn was not affected by WW irrigation or soil properties. Gypsum application reduced soil pH but increased soil EC. WW irrigation and related soil pH affected arthropod composition in the investigated spinach fields which may lead to negative effects on agronomical important arthropod groups such as pollinators and predators.
使用处理不当的工业废水进行灌溉，可能会导致农田土壤碱化和盐渍化加剧，对土壤性质和生物群产生负面影响。石膏作为盐碱土的土壤改良剂，在农业领域被广泛用于改善土壤的物理、化学性质，进而改善土壤的生物学性质。本研究旨在分析在西非城市蔬菜生产系统中，用工业废水大量灌溉对菠菜地（菠菜）土壤节肢动物的结构和组成产生的影响。我们使用石膏作为土壤改良剂，以缓解土壤化学胁迫，这可能对土壤节肢动物产生潜在的积极影响。共设置了32个样地，土壤pH值呈轻微至强碱性梯度变化，分别用工业废水（n = 12）或清水（n = 20）灌溉，其中8个样地添加了石膏。我们的研究表明，土壤节肢动物对碱性土壤具有较高的耐受性，但土壤电导率增加的菠菜地中膜翅目、双翅目和叶蝉科的数量有所减少。节肢动物的数量与茂密的菠菜覆盖度呈正相关，而菠菜覆盖度不受工业废水灌溉或土壤性质的影响。施用石膏降低了土壤pH值，但提高了土壤电导率。工业废水灌溉和相关的土壤pH值影响了所研究菠菜地中的节肢动物组成，这可能会对传粉者和捕食者等对农业重要的节肢动物群体产生负面影响。
