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Biodegradable film mulching combined with straw incorporation can significantly reduce global warming potential with higher spring maize yield
Agriculture, Ecosystems & Environment ( IF 6.6 ) Pub Date : 2022-09-24 , DOI: 10.1016/j.agee.2022.108181
Rui Qian, Ru Guo, Yang Liu, Muhammad Asad Naseer, Sadam Hussain, Donghua Liu, Peng Zhang, Xiaoli Chen, Xiaolong Ren

The sole effect of crop straw incorporation or film mulching on soil organic carbon (SOC) content, greenhouse gas (GHG) emission and crop yield is well documented in the literature; however, the combined effects of biodegradable film mulching coupled with straw incorporation on these aspects is not yet studied in detail. We conducted a field experiment expanding over five years to evaluate the influence of different film mulching with straw incorporation treatments: (i) double-ridge furrow sowing with full film mulching plus straw incorporation (DS), (ii) double-ridge furrow sowing with full film mulching (D), (iii) conventional tillage plus straw incorporation (S), and (iv) conventional tillage (CK) on organic carbon contents (SOC), GHG emissions and maize productivity. An average of the results of five years revealed that DS, as compared to CK, increased grain and biological yield by 74.06 % and 29.47 % (P < 0.05), followed by D and S (except for 2017). With every progressing year, DS significantly increased the organic carbon content in the 0–20 cm soil layer with an approximately increase of 17.60 % from 2015 to 2020. A maximum total organic carbon storage of 130.99 Mg C ha−1 in 0–100 cm soil profile was recorded for DS, which was significantly (P < 0.05) higher than other treatments. Conversely, compared with CK, DS increased CO2 and N2O emissions by 34.38 % and 33.95 %, respectively, but significantly reduced the global warming potential (GWP) and greenhouse gas intensity (GHGI) by 41.96 % and 64.91 %, respectively. It is concluded that the use of biodegradable mulch coupled with straw incorporation could be an efficient strategy leading to improved maize yield and organic carbon content, and reduced net global warming potential (NGWP) and GHGI in semi-arid rainfed areas.



中文翻译:

可生物降解地膜与秸秆掺入相结合可显着降低全球变暖潜能值,提高春玉米产量

作物秸秆掺入或地膜覆盖对土壤有机碳 (SOC) 含量、温室气体 (GHG) 排放和作物产量的唯一影响已在文献中得到充分证明;然而,尚未详细研究可生物降解地膜覆盖和秸秆掺入在这些方面的综合影响。我们进行了一项为期五年的田间试验,以评估不同地膜覆盖与秸秆掺入处理的影响:(i)双垄沟播,全膜覆盖加秸秆掺入(DS),(ii)双垄沟播全膜覆盖(D),(iii)常规耕作加秸秆掺入(S)和(iv)常规耕作(CK)对有机碳含量(SOC)、温室气体排放和玉米生产力的影响。五年的平均结果表明,与 CK 相比,DS 粮食和生物产量分别增加 74.06 % 和 29.47 %(P < 0.05),其次是 D 和 S(2017 年除外)。随着时间的推移,DS显着增加了0-20 cm土壤层中的有机碳含量,从2015年到2020年大约增加了17.60%。最大总有机碳储存量为130.99 Mg C haDS 在 0-100 cm 土壤剖面中记录为-1,显着(P < 0.05)高于其他处理。相反,与CK相比,DS分别增加了34.38 %和33.95 %的CO 2和N 2 O排放,但显着降低了全球变暖潜能值(GWP)和温室气体强度(GHGI)分别为41.96 %和64.91 %。得出的结论是,在半干旱雨养地区,使用可生物降解的覆盖物结合秸秆掺入可能是一种有效的策略,可提高玉米产量和有机碳含量,并降低净全球变暖潜能值 (NGWP) 和 GHGI。

更新日期:2022-09-25
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