2019 Litter Bag Experiment UKiel Decomposition data

In 2018/19 three different potential soil amendments (faba bean straw, winter wheat straw and spruce sawdust) grinded to 1-5 mm have been buried in nylon tea bags 10 cm deep in 20L pots. The soil used was extracted shortly before from a nearby field under agricultural use (1 month after harvest of faba beans). The bags were buried on 2018-08-17 and retrieved on 6 occasions until 2019-03-07. After cleaning and drying, dry matter of the remaining amendment in the bag was determined. Temperature was logged inside a pot, inside the facility (concrete soil) and outside in a tree (grassy soil).

Research domain: Plant Cultivation and Agricultural Technology

Research question: What are the parameters describing decomposition of the different amendments in time?

2018至2019年间，研究人员将三种潜在土壤改良剂（蚕豆秸秆、冬小麦秸秆及云杉锯屑）研磨至1~5毫米粒径，装入尼龙茶袋后埋入20升盆钵的10厘米深处。所用土壤取自紧邻的农用田，采集时间距埋袋实验极近，彼时距蚕豆收获仅1个月。实验于2018年8月17日完成埋袋，直至2019年3月7日前共开展6次取样回收。取回的样品经清洁、干燥处理后，测定袋内残留改良剂的干物质含量。研究人员同步记录了三处环境温度：盆钵内部、试验设施内（混凝土覆盖土壤）以及室外树下的草地表层土壤。

研究领域：植物栽培与农业技术
研究问题：可表征不同改良剂随时间分解过程的参数有哪些？