The Waite Research Institute, and The School of Agriculture, Food and Wine, The University of Adelaide, The Waite Campus, PMB 1 Glen Osmond, Adelaide, South Australia, 5064, Australia.
Sci Rep. 2018 Jan 24;8(1):1509. doi: 10.1038/s41598-017-18780-2.
We aimed to investigate the combined impacts of compost addition and pre-planting soil moisture conditions, on plant-available nutrients, and subsequent impacts on the biomass, nutrition and formation of AM by two important crop species. A glasshouse study was undertaken in which wheat and tomato plants were grown in compost amended or un-amended soil that was subjected to different moisture regimes prior to planting. The availability of P was strongly influenced by compost addition, but not pre-planting moisture conditions. In contrast, mineral N pools were affected by compost addition and pre-planting soil moisture conditions in complex ways. These changes in nutrient availability affected plant biomass, nutrient uptake and formation of AM. In general, plant performance was better where pre-planting soil moisture conditions were wet or dry, and worse where they involved a wet/dry cycle, and mycorrhizal colonisation was lower where compost was added to the soil. That pre-planting moisture conditions affect the biomass of subsequent crops is an important finding, the potential implications of which are considered here.
我们旨在研究堆肥添加和播种前土壤水分条件对两种重要作物可利用养分的综合影响，以及随后对生物量、养分和丛枝菌根形成的影响。在温室研究中，在种植前对添加或不添加堆肥的土壤进行不同的水分处理，然后在其中种植小麦和番茄植物。磷的有效性受堆肥添加的强烈影响，但不受播种前水分条件的影响。相比之下，矿质氮库受堆肥添加和播种前土壤水分条件的复杂影响。养分有效性的这些变化影响了植物生物量、养分吸收和丛枝菌根的形成。一般来说，在播种前土壤水分条件为湿润或干燥的情况下，植物表现更好，在涉及干湿循环的情况下表现更差，而在土壤中添加堆肥的情况下，菌根定殖较低。播种前水分条件会影响后续作物的生物量，这是一个重要的发现，本文考虑了其潜在影响。
