Biodegradable plastics applied to soil stimulate the production of greenhouse gases and inhibit plant growth under aerobic conditions. This study aimed to examine the effects of biodegradable plastics on paddy rice growth and greenhouse gas emission under flooding conditions in pot experiments and also on greenhouse gas production under flooding conditions in an incubation experiment. Two series of pot experiments were conducted with rice (Oryza sativa). First series as immediate flooded and 2nd series as 2 weeks nonflooding before flooded, and both kept flooded until harvest. The following four kinds of materials were added to the sandy paddy soil, (1) nonwoven fabric sheets made of polylactic acid and polybutylene-succinate, (2) laminate sheets made of polybutylene adipate terephthalate and pulp, (3) cellulose filter paper, and (4) rice straw. Only soil was used as control. Methane (CH₄) emission, measured by chamber method followed by gas chromatography, was significantly larger only in the cellulose treatment than the laminate treatment in the immediate flooded series, indicating that biodegradable plastics had no significant impact on CH₄ emission from paddy rice soil. Rice growth and yield did not show significant difference among treatments in both series. Incubation experiment showed the largest CH₄ production in cellulose-amended soil, followed by straw-amended and laminate amended soils, and least in fabric-amended soil, while CO₂ did not show significant differences among treatments. We need further examination with different biodegradable plastics for a longer period that test used in this study.

应用于土壤的可生物降解塑料会刺激温室气体的产生，并在有氧条件下抑制植物生长。本研究旨在通过盆栽实验研究可生物降解塑料对淹水条件下水稻生长和温室气体排放的影响，以及在孵化实验中对淹水条件下温室气体产生的影响。用水稻（Oryza sativa）进行了两个系列的盆栽实验。第一个系列立即淹水，第二个系列在淹水前两周不淹水，并且都保持淹水直至收获。将以下四种材料添加到沙稻土中：(1)由聚乳酸和聚丁二酸丁二醇酯制成的无纺布片，(2)由聚己二酸对苯二甲酸丁二醇酯和纸浆制成的层压片，(3)纤维素滤纸，和(4)稻草。仅使用土壤作为对照。通过室法和气相色谱法测量的甲烷 (CH ₄ ) 排放量仅在纤维素处理中显着大于立即淹没系列中的层压处理，表明可生物降解塑料对 CH 没有显着影响 ₄ 水稻土排放。两个系列处理之间的水稻生长和产量没有表现出显着差异。培养实验表明，纤维素改良土壤中 CH ₄ 产量最大，秸秆改良土壤和层压板改良土壤次之，织物改良土壤中最少，而 CO ₂ 没有表现出处理之间存在显着差异。我们需要对不同的可生物降解塑料进行比本研究中使用的测试更长的时间的进一步检查。