{"type": "FeatureCollection", "features": [{"id": "10.1007/s003740050505", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:14:24Z", "type": "Journal Article", "created": "2002-08-25", "title": "Effects Of Trefoil Cover Crop And Earthworm Inoculation On Maize Crop And Soil Organisms In Reunion Island", "description": "Traditional tree fallows have been abandoned on the western coast of the Reunion Island because of the increasing need for cultivated land. Soil fertility is no longer restored and crop yields have decreased drastically. The leguminous plant, Lotus uliginosus (trefoil), used as a cover crop, has made possible the control of erosion, the restoration of soil macrofauna, especially earthworms, and the increase in crop yields. When trefoil was associated with earthworms (Amynthas corticis), the densities of maize, the yields of maize stalk and dry matter, the yield of trefoil fodder dry matter, and the biomass and respiratory activity of soil microflora were considerably increased. The combined effects of their association led to a significant decrease in populations of the plant-parasitic nematode, Pratylenchus vulnus, in maize roots, and in the population of borers. Some soil chemical features were modified.", "keywords": ["RENDEMENT", "propri\u00e9t\u00e9 physicochimique du sol", "COUVERT VEGETAL", "organisme du sol", "F08 - Syst\u00e8mes et modes de culture", "rendement des cultures", "http://aims.fao.org/aos/agrovoc/c_29111", "FAUNE DU SOL", "taux de croissance", "Zea mays", "630", "plante de couverture", "ravageur des plantes", "Pratylenchus vulnus", "http://aims.fao.org/aos/agrovoc/c_10176", "http://aims.fao.org/aos/agrovoc/c_3081", "http://aims.fao.org/aos/agrovoc/c_33552", "Oligochaeta", "2. 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However, a thorough functional assessment of biochar effect on plant growth and resource allocations is so far missing. Moreover, earthworms and biochar increase mineral nutrient availability through an increase in mineralization and nutrient retention respectively and are likely to interact through various other mechanisms. They could thus increase plant growth synergistically. This hypothesis was tested for rice in a greenhouse experiment. Besides, the relative effects of biochar and earthworms were compared in three different soil treatments (a nutrient rich soil, a nutrient poor soil, a nutrient poor soil supplemented with fertilization). Biochar and earthworm effects on rice growth and resource allocation highly depended on soil type and were generally additive (no synergy). In the rich soil, there were both clear positive biochar and earthworm effects, while there were generally only positive earthworm effects in the poor soil, and neither earthworm nor biochar effect in the poor soil with fertilization. The analysis of earthworm and biochar effects on different plant traits and soil mineral nitrogen content, confirmed that they act through an increase in nutrient availability. However it also suggested that another mechanism, such as the release in the soil of molecules recognized as phytohormones by plants, is also involved in earthworm action. This mechanism could for example help explaining how earthworms increase rice resource allocation to roots and influence the allocation to grains.", "keywords": ["[SDE] Environmental Sciences", "330", "earthworms", "FAUNE DU SOL", "fertilidad del suelo", "630", "12. Responsible consumption", "AZOTE", "AMENDEMENT DU SOL", "CROISSANCE", "arroz", "2. 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