Mulching effects on soil temperature and maize yield in dryland
[Objective]To investigate the impact of mulching on soil temperature and the yield of spring maize in dryland conditions.[Method]In the semi-arid region of central Longzhong,three cultivation treat-ments were implemented:straw strip mulching(SM),white film double ridge furrow mulching(BM),and open field no-mulching(CK).The effects of these different mulching practices on soil temperature,dry mat-ter accumulation,and yield of spring maize were analyzed.[Result]Mulching significantly regulated soil temperature throughout the entire growth period of spring maize.Compared to CK,the SM treatment re-duced soil temperatures in the 0～25 cm depth range by 0 to 1.1℃from the seedling to the maturity stage,whereas the BM treatment increased temperatures by 0.2 to 3.0℃.The greatest decrease and increase in soil temperature due to SM and BM treatments occurred during the seedling stage.Among soil layers,the average temperature in the 0 to 25 cm layer treated with SM was 0.6℃lower than CK,with the most sig-nificant reduction observed in the 10 cm layer.Conversely,the average temperature increase with BM was 0.6℃,with the largest increase observed in the 25 cm soil layer.Mulching also significantly enhanced dry matter accumulation per plant and grain yield of spring maize.Compared with CK,the dry matter accumula-tion per plant for SM and BM treatments increased by 32.4%and 34.6%,respectively,and grain yield in-creased by 13.4%and 48.9%,respectively.Correlation analysis revealed a positive correlation between maize grain yield and ear number(r=0.771*),indicating that mulching primarily increased corn yield by af-fecting the number of ear grains.[Conclusion]Both mulching film and straw strip mulching effectively regulated soil temperature throughout the entire growth period of spring maize and significantly increased dry matter accumulation and yield.Moreover,straw strip mulching can improve the resource utilization rate of waste straw,presenting a cultivation technique suitable for green and sustainable production of dryland maize.
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万方数据
维普
