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Effects of different drip irrigation regimes on saline–sodic soil nutrients and cotton yield in an arid region of Northwest China

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  • Wang, Ruoshui
  • Kang, Yaohu
  • Wan, Shuqin

Abstract

A field experiment was conducted on a saline wasteland in Xinjiang, Northwest China, during 2008–2010 to evaluate the nutrient behavior and cotton yield during reclamation, applied by different drip irrigation regimes. The experiment included five treatments in which the soil matric potential (SMP) thresholds at 20cm depth were controlled at −5, −10, −15, −20 and −25kPa. The results indicated that both soil salinity and sodicity declined significantly at 0–40cm depth and greater reductions were achieved at higher SMP thresholds (−5 and −10kPa) than in other treatments. The distributions in soil inorganic nitrogen (N) and available phosphorus (P) and potassium (K) in the soil profile were mainly influenced by the point-source characteristic of drip irrigation, drip irrigation regime and fertilization mode. With the reclamation of both soil chemical and physical properties, there were dramatic increases in soil N, P and K concentration by the end of 2010. The soil nutrient concentrations in N, P and K were all proportional to the SMP thresholds, as higher SMP could result in greater reductions in soil salinity and sodicity. Since crop growth became more vigorous during reclamation, there was also a considerable increase (9.7–31.9%) in soil organic carbon by the end of 2010, and the concentrations were also proportional to SMP thresholds. The highest cotton yield was obtained in S1 (−5kPa) treatment for both 2009 (2.87Mgha−1) and 2010 (3.60Mgha−1). Additionally, the soil C:N ratios were inversely proportional to the SMP thresholds in 2009 and 2010. Considering the soil reclamation efficiency, soil nutrient stocks and cotton yield, SMP thresholds of −5 and −10kPa could be used as effective measures to trigger irrigation in the first 3 years of saline–sodic soil reclamation in Xinjiang, Northwest China.

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  • Wang, Ruoshui & Kang, Yaohu & Wan, Shuqin, 2015. "Effects of different drip irrigation regimes on saline–sodic soil nutrients and cotton yield in an arid region of Northwest China," Agricultural Water Management, Elsevier, vol. 153(C), pages 1-8.
    • Handle: RePEc:eee:agiwat:v:153:y:2015:i:c:p:1-8
    DOI: 10.1016/j.agwat.2015.01.025
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    References listed on IDEAS

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    1. Sun, Jiaxia & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Jiang, Shufang & Zhang, Tibin, 2012. "Soil salinity management with drip irrigation and its effects on soil hydraulic properties in north China coastal saline soils," Agricultural Water Management, Elsevier, vol. 115(C), pages 10-19.
    2. Wang, Ruoshui & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Liu, Shiping & Liu, Shuhui, 2011. "Salt distribution and the growth of cotton under different drip irrigation regimes in a saline area," Agricultural Water Management, Elsevier, vol. 100(1), pages 58-69.
    3. Wang, Ruoshui & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Liu, Shiping & Jiang, Shufang & Liu, Shuhui, 2012. "Influence of different amounts of irrigation water on salt leaching and cotton growth under drip irrigation in an arid and saline area," Agricultural Water Management, Elsevier, vol. 110(C), pages 109-117.
    4. Chen, Ming & Kang, Yaohu & Wan, Shuqin & Liu, Shi-ping, 2009. "Drip irrigation with saline water for oleic sunflower (Helianthus annuus L.)," Agricultural Water Management, Elsevier, vol. 96(12), pages 1766-1772, December.
    5. Chen, Weiping & Hou, Zhenan & Wu, Laosheng & Liang, Yongchao & Wei, Changzhou, 2010. "Evaluating salinity distribution in soil irrigated with saline water in arid regions of northwest China," Agricultural Water Management, Elsevier, vol. 97(12), pages 2001-2008, November.
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    Cited by:

    1. Li, Yinkun & Wang, Lichun & Xue, Xuzhang & Guo, Wenzhong & Xu, Fan & Li, Youli & Sun, Weituo & Chen, Fei, 2017. "Comparison of drip fertigation and negative pressure fertigation on soil water dynamics and water use efficiency of greenhouse tomato grown in the North China Plain," Agricultural Water Management, Elsevier, vol. 184(C), pages 1-8.
    2. Chen, Xiaoping & Qi, Zhiming & Gui, Dongwei & Sima, Matthew W. & Zeng, Fanjiang & Li, Lanhai & Li, Xiangyi & Gu, Zhe, 2020. "Evaluation of a new irrigation decision support system in improving cotton yield and water productivity in an arid climate," Agricultural Water Management, Elsevier, vol. 234(C).
    3. Wang, Ruoshui & Wan, Shuqin & Sun, Jiaxia & Xiao, Huijie, 2018. "Soil salinity, sodicity and cotton yield parameters under different drip irrigation regimes during saline wasteland reclamation," Agricultural Water Management, Elsevier, vol. 209(C), pages 20-31.
    4. Qi, Zhijuan & Feng, Hao & Zhao, Ying & Zhang, Tibin & Yang, Aizheng & Zhang, Zhongxue, 2018. "Spatial distribution and simulation of soil moisture and salinity under mulched drip irrigation combined with tillage in an arid saline irrigation district, northwest China," Agricultural Water Management, Elsevier, vol. 201(C), pages 219-231.

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