Effects of Wheat and Rapeseed Production on Soil Water Storage in Mongolian Rangeland

Katori Miyasaka, Takafumi Miyasaka, Jumpei Ota, Siilegmaa Batsukh and Undarmaa Jamsran
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Katori Miyasaka: College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Kanagawa, Japan
Takafumi Miyasaka: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya-shi 464-8601, Aichi, Japan
Jumpei Ota: College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Kanagawa, Japan
Siilegmaa Batsukh: School of Geology and Mining Engineering, Mongolian University of Science and Technology, P.O. Box 46/338, Ulaanbaatar 210646, Mongolia
Undarmaa Jamsran: Center for Ecosystem Studies, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia

Agriculture, 2021, vol. 11, issue 9, 1-21

Abstract: In recent years, Mongolia has witnessed an increase in not only wheat fields, which have been present for a long time, but also rapeseed fields. This has led to increasing concerns about soil degradation due to inappropriate cultivation. This study aims to determine the impacts of rapeseed production on soil water storage in Mongolia. The soil water content and matric potential were measured in wheat and rapeseed fields and adjacent steppe rangeland for five years, including crop production and fallow years, and the soil water storages in the fields were compared. The results demonstrated that the matric potential below the root zone in the rapeseed field and both rangelands was drier than the wilting point, whereas the potential in the wheat field was usually almost the same or wetter than this point. The comparison of the amount of soil water storage during the fallow year with that of the adjacent rangeland showed it to be 5–10% higher for the wheat field and almost equal for the rapeseed field. Field management must consider the fact that rapeseed fields use more water than is required by wheat fields and that less water is stored during fallow periods.

Keywords: canola; crop management; soil water content; matric potential (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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