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Article

Effect of Smashing Ridge Tillage Depth on Soil Water, Salinity, and Yield in Saline Cotton Fields in South Xinjiang, China

by 1,2, 1,2,*, 3,*, 1,2, 3, 1,2, 1,2, 1,2, 1,2 and 1,2
1
College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832000, China
2
Xinjiang Production & Construction Group Key Laboratory of Modern Water-Saving Irrigation, Shihezi 832000, China
3
Institute of Agricultural Science of the Third Division of Xinjiang Production and Construction Corps, Tumushuk 843900, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Jan Wesseling
Water 2021, 13(24), 3592; https://doi.org/10.3390/w13243592
Received: 11 October 2021 / Revised: 11 December 2021 / Accepted: 12 December 2021 / Published: 14 December 2021
(This article belongs to the Special Issue Fertigation in Agriculture: Challenges and Solutions)
To explore the potential of smashing ridge tillage irrigation, it is necessary to investigate how smashing ridge tillage technology with mulched drip irrigation affects soil water, salinity, and cotton yield in saline fields. We conducted a two-year (2020–2021) field experiment to study the effects of different smashing ridge tillage depths on soil bulk density, moisture, salinity, dry matter production, yield, and its constituents (effective bolls, 100-bell weight). There were three smashing ridge tillage depths: A (20 cm), B (40 cm), and C (60 cm), with traditional tillage as the CT. The results showed that all of the smashing ridge tillage could reduce soil bulk density, improve the utilization and uptake of deep soil water during the rapid growth period, and reduce the soil salt content. Compared with the CT treatment, the average soil bulk density of the 0–60 cm soil layer in treatments A, B, and C in 2020 and 2021 decreased by 3.05%, 5.87%, 10.09%, and 1.65%, 4.48%, and 8.49%, respectively. The average soil water content in the 0–120 cm soil layer at the flowering and boll stage decreased by 3.68%, 6.28%, 9.04%, and 3.59%, 6.52%, and 9.98%, respectively; the soil salt content in the 0–120 cm soil layer at the boll opening stage decreased by 4.21%, 6.75%, 11.95%, and 5.47%, 24.25%, and 54.13%, respectively. Cotton dry matter production and yield tended to increase with an increasing depth of smash ridge tillage. Treatment C obtained the maximum dry matter production, seed cotton yield, effective bolls, and 100-boll weight. The dry matter production at the boll opening stage was significantly increased by 17.16% and 15.91%, and the yield was significantly increased by 65.24% and 84.14% in treatments C in 2020 and 2021, respectively, compared to CT. The smashing ridge tillage of 60 cm can optimize the structure of the soil tillage layer and also reduce soil salinity and increase yield, which is the suitable depth of smashing ridge tillage for saline cotton fields in the south of Xinjiang. The findings of the study can provide some theoretical basis and practical experience for the improvement of saline soils and sustainable agricultural development in South Xinjiang, China. View Full-Text
Keywords: smashing ridge tillage; mulched drip irrigation; soil moisture; soil salinity; yield smashing ridge tillage; mulched drip irrigation; soil moisture; soil salinity; yield
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MDPI and ACS Style

Bai, Z.; Liu, H.; Wang, T.; Gong, P.; Li, H.; Li, L.; Xue, B.; Cao, M.; Feng, J.; Xu, Y. Effect of Smashing Ridge Tillage Depth on Soil Water, Salinity, and Yield in Saline Cotton Fields in South Xinjiang, China. Water 2021, 13, 3592. https://doi.org/10.3390/w13243592

AMA Style

Bai Z, Liu H, Wang T, Gong P, Li H, Li L, Xue B, Cao M, Feng J, Xu Y. Effect of Smashing Ridge Tillage Depth on Soil Water, Salinity, and Yield in Saline Cotton Fields in South Xinjiang, China. Water. 2021; 13(24):3592. https://doi.org/10.3390/w13243592

Chicago/Turabian Style

Bai, Zhentao, Hongguang Liu, Tangang Wang, Ping Gong, Huiqin Li, Ling Li, Bao Xue, Minghai Cao, Jinping Feng, and Yibin Xu. 2021. "Effect of Smashing Ridge Tillage Depth on Soil Water, Salinity, and Yield in Saline Cotton Fields in South Xinjiang, China" Water 13, no. 24: 3592. https://doi.org/10.3390/w13243592

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