Li, M.; Wang, W.; Wang, X.; Yao, C.; Wang, Y.; Wang, Z.; Zhou, W.; Chen, E.; Chen, W. Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils. Water2023, 15, 3227.
Li, M.; Wang, W.; Wang, X.; Yao, C.; Wang, Y.; Wang, Z.; Zhou, W.; Chen, E.; Chen, W. Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils. Water 2023, 15, 3227.
Li, M.; Wang, W.; Wang, X.; Yao, C.; Wang, Y.; Wang, Z.; Zhou, W.; Chen, E.; Chen, W. Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils. Water2023, 15, 3227.
Li, M.; Wang, W.; Wang, X.; Yao, C.; Wang, Y.; Wang, Z.; Zhou, W.; Chen, E.; Chen, W. Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils. Water 2023, 15, 3227.
Abstract
This study chose the indoor soil column test as the main method and the field test as the validation test to investigate the effects of various straw mulching techniques (surface, deep and straw mulching + deep burial) on evaporation and salt dynamics in saline soils. The results showed that straw mulching treatment could effectively reduce soil water evaporation, promote desalination in the stage of leaching infiltration and alleviate salt return in the stage of water evaporation, and the effect of straw mulching + deep burial treatment was better than that of single-layer straw mulching treatment. The indoor soil column test showed that S2D1 treatment (a 2:1 ratio of soil surface cover to the amount of straw buried 40cm below the soil surface) had the best effect on the suppression of soil moisture evaporation, and the cumulative evaporation of soil moisture was reduced by 65.85% compared with that of the CK, and the rate of salinity return in the evaporation stage was effectively reduced by 92.04% compared with that of the CK. In addition, there is a significant positive correlation between cumulative evaporation of soil moisture and cumulative soil salinity, which implies that cumulative soil salinity increases with cu-mulative evaporation of soil moisture. The results of the field experiment were consistent with the soil column test, and the S2D1 treatment was able to maintain high soil moisture content in all soil layers in all periods of the experiment and kept soil salinity in the 0-40 cm soil layer at a low level. However, in the 40-80 cm soil layer, the soil salinity suppression effect of DB treatment (straw buried at 40 cm below soil surface) was the best. So in summary, the S2D1 treatment had the best salinity and evapo-transpiration suppression effect in saline soils. This study is of great significance for the resource uti-lization of straw waste, improvement of water utilization and efficiency, and soil salinization manage-ment.
Copyright:
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