The use of plastic film mulching (PM) has steadily increased in the past few decades due to many advantages compared to no film mulching (NM). However, PM also has many drawbacks, such as producing plastic film residues and causing high temperatures at later crop growth stages. Thus, biodegradable film mulching (BM) has recently been used as an excellent alternative solution. In this study, the effects of three mulching types, including PM, BM, and NM, on soil temperatures (T_s) are evaluated using field experiments. Three mulching types with an irrigation depth of 22.5 mm (i.e., PM_22.5, BM_22.5, and NM_22.5) and three irrigation depths of 15, 22.5, and 30 mm with BM (i.e., BM₁₅, BM_22.5, and BM₃₀, respectively) were compared. Additionally, the T_s fluctuations and distributions during different crop growth stages were simulated using HYDRUS (2D/3D). The results showed that HYDRUS (2D/3D) successfully simulated T_s with RMSE of 2.11–4.00 °C, EF of 0.63−0.85, and MRE of 8.1 %–11.6 % during the validation period. There were large differences in T_s among PM_22.5, BM_22.5, and NM_22.5 in different crop growth stages. In the elongation and tasseling stages, T_s under PM_22.5 and BM_22.5 was not significantly different but markedly improved compared with NM_22.5. In the filling and maturation stages, higher variability of T_s was observed under BM_22.5 compared with PM_22.5. The standard deviation (SD), the deviation variance (DV), and the kurtosis coefficient (K) under BM_22.5 were by 6.7 %, 32.6 %, and 19.3 % higher than under PM_22.5, while accumulated soil temperature (AT) and the ratio of effective accumulated soil temperature (AET, ≥10 °C) to AT (R_T) decreased by 3.8 % and 4.0 %, respectively. Additionally, apparent differences in T_s between BM_22.5 and PM_22.5 appeared mainly in the soil surface layer (0−10 cm). The area with “optimal T_s” (i.e., corn growth is optimal in the T_s range of 20−24 °C) in the 0−30 cm soil layer increased by 33.5 % under BM_22.5 compared with PM_22.5. Moreover, T_s decreased with an increase in the irrigation depth from BM₁₅ to BM_22.5, and BM₃₀, with the maximum size of the “optimal T_s” area under BM_22.5. Generally, BM has more advantages in terms of heat preservation and preventing high temperatures compared with NM and PM, respectively. Therefore, the biodegradable film can be recommended as an alternative material to replace the traditional polyethylene film.

与无地膜覆盖 (NM) 相比，由于具有许多优势，塑料地膜覆盖 (PM) 的使用在过去几十年中稳步增加。但是，PM也有很多弊端，例如产生塑料薄膜残留物以及在作物生长后期引起高温。因此，可生物降解地膜 (BM) 最近已被用作一种极好的替代解决方案。在这项研究中，三组地膜覆盖的类型，包括PM，BM，和NM的（影响，土壤温度Ť_小号）使用现场实验进行评价。三种覆盖类型，灌溉深度为 22.5 mm（即 PM _22.5、BM _22.5和 NM _22.5）和三种灌溉深度为 15、22.5 和 30 mm 的 BM（即 BM ₁₅、BM_22.5和 BM ₃₀分别）进行了比较。此外，该Ť_小号在不同作物生长期的波动和分布使用HYDRUS（2D / 3D）进行了模拟。结果表明，HYDRUS（2D / 3D）成功地模拟Ť_小号与RMSE的2.11-4.00℃，EF的0.63-0.85，和MRE的8.1％-11.6％在验证期间。PM _22.5、BM _22.5和NM _22.5在不同作物生长阶段的T _s存在较大差异。在伸长和抽雄阶段，PM 下的T _s22.5和 BM _22.5没有显着差异，但与 NM _22.5相比有显着改善。在填充和成熟阶段的更高变异Ť_小号被BM下观察_22.5与PM相比_22.5。BM _22.5下的标准差 ( SD )、偏差方差 ( DV ) 和峰态系数 ( K )比 PM _22.5下高 6.7 %、32.6 % 和 19.3 % ，而累积土壤温度 (AT) 和有效累积土壤温度 (AET, ≥10 °C) 与 AT ( R _T) 分别下降了 3.8% 和 4.0%。此外，BM _22.5和 PM _22.5之间T _{s 的}明显差异主要出现在土壤表层（0-10 cm）。与 PM _22.5相比，在 BM _22.5下，0-30 cm 土层中具有“最佳T _s ”（即，玉米生长在20-24 °C的T _s范围内最佳）_的区域在 BM _22.5下增加了 33.5% 。此外，随着灌溉深度从 BM ₁₅到 BM _22.5和 BM ₃₀的增加，T _s减小，“最佳T _s” BM _22.5下的区域。一般来说，BM在保温和防止高温方面分别比NM和PM更具优势。因此，可推荐生物降解薄膜作为替代材料来替代传统的聚乙烯薄膜。