To study the greenhouse gas (GHG) emission with biochar amendment in two or more soils with different textures, an incubation experiment was carried out with two paddy soils (developed from granite-weathered red soil (S1) and from quaternary red clay (S2)) with different textures in flooding condition. The soils were subjected to the following three biochar (derived from wheat straw) treatments: 0%, 1% and 2% of soil weight, represented by CK, LC and HC, respectively. The incubation lasted for 180 d. Biochar significantly increased CO₂ emission by 5.8–9.9% in S1. Biochar can combine with soil particles and provide a suitable habitat for soil microbes in S1, which increased organic C decomposition. However, biochar had no effect on CO₂ emission in S2, which was due to soil aggregate formation with biochar amendment. Furthermore, biochar addition considerably reduced CH₄ emission by 19.8–28.2% and 31.7–37.1% in comparison with those in CK in S1 and S2. Increased soil pH and decreased soil NH₄⁺–N contributed to the reduction in CH₄ emission. However, due to soluble C and N within biochar, N₂O emissions with biochar amendment were significantly increased by 22.8–27.5% and 36.5–42.8% compared with those in CK in S1 and S2, which mainly occurred in the first 5 d. The increase in N₂O emission with biochar amendment in S2 was higher than that in S1, which can be attributed to improved soil aeration with biochar application in silt clay loam soil. The net greenhouse gas emission (NGHGE, CO₂-equivalents), based on the global warming potential of which for a given time horizon (e.g., 100 years), was used to assess the climatic impacts. Due to C sequestration of biochar, biochar amendment significantly decreased the NGHGE by 5123–10,250% and 5480–10,958% in S1 and S2. This study provides a theoretical basis for the application of biochar in paddy field.

为了研究在两种或更多种不同质地的土壤中使用生物炭改良剂产生的温室气体（GHG）的排放，我们对两种稻田土壤（由花岗岩风化的红壤（S1）和第四纪的红粘土（S2）开发）进行了温育实验。 ）在淹没条件下具有不同的纹理。对土壤进行以下三种生物炭处理（源自麦草）：分别以CK，LC和HC表示的土壤重量的0％，1％和2％。孵育持续了180天。生物炭在S1中使CO ₂排放显着增加5.8–9.9％。生物炭可以与土壤颗粒结合，为S1中的土壤微生物提供合适的栖息地，从而增加了有机碳的分解。但是，生物炭对CO ₂没有影响S2中的碳排放，这是由于生物炭改良形成的土壤团聚体。此外，与S1和S2中的CK相比，添加生物炭显着减少了CH ₄排放，分别降低了19.8-28.2％和31.7-37.1％。土壤pH的升高和土壤NH ₄ ⁺ -N的降低有助于CH ₄排放量的减少。但是，由于生物炭中的可溶性碳和氮，经生物炭改良处理后的N ₂ O排放量与CK在S1和S2中的排放相比分别显着增加了22.8–27.5％和36.5–42.8％，这主要发生在前5天。N ₂的增加S2施用生物炭改良后的O排放量高于S1，这可以归因于在淤泥质壤土中施用生物炭改善了土壤通气性。基于给定时间范围（例如100年）的全球变暖潜能，净温室气体排放量（NGHGE，CO _2-当量）用于评估气候影响。由于C隔离生物碳，生物碳修正显着降低了S1和S2中NGHGE的5123–10,250％和5480–10,958％。该研究为生物炭在稻田中的应用提供了理论依据。