Salinity Accumulation in the Root Area of the Curly Lettuce Grown in Deficit Irrigation Conditions

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Kaman H., Demir H., Sönmez İ., Polat E., Mohamoud S. S., Ucok Z.

JOURNAL OF TEKIRDAG AGRICULTURE FACULTY-TEKIRDAG ZIRAAT FAKULTESI DERGISI, cilt.18, sa.3, ss.508-520, 2021 (ESCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.33462/jotaf.846652
  • Dergi Adı: JOURNAL OF TEKIRDAG AGRICULTURE FACULTY-TEKIRDAG ZIRAAT FAKULTESI DERGISI
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.508-520
  • Anahtar Kelimeler: Lettuce, Deficit irrigation, Partial root drying Technique, Salt accumulation, Drainage, Leaching, WATER-USE EFFICIENCY, YIELD RESPONSE, SOIL-SALINITY, TOMATO, MAIZE, ZONE, SALT
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Salt accumulation in the root zone at the end of the irrigation season compared to the beginning of the irrigation season was investigated for curly lettuce plants in this study. The study was conducted in a spring-roofed plastic-covered greenhouse in a spring growing season in 2018 and the Campania curly lettuce (Lactuca sativa var. crispa) variety was used as the plant material. The conventional drip irrigation (GS125, GS100, GS75 and GS50) and partial root drying technique (AYIS125, AYIS100, AYIS75 and AYIS50) applications were investigated in the study. In the alternate partial root drying technique (APRD) application, the wet and dry parts were replaced in the following irrigations, respectively. In other words, in APRD application, while one half of the plant root area was wetted relatively during irrigation, the remaining half was left relatively dry and the parts left wet and dry in the next irrigation were replaced. In order to determine the salinity accumulation in the plant root zone, soil samples were taken from 0-10, 10-20 and 20-30 cm depths to represent the soil in three replicates at the beginning of the irrigation season. Similarly, at the end of the irrigation season, soil samples were taken from the plant root area in three replicates under each irrigation application. Mud strainers were obtained from soil samples using the traditional method in the laboratory and salinity measurements were made. While the lowest salinity value was measured as 0.49 dS m(-)1 in GS100 application, the highest salinity value was recorded as 1.40 dS m(-1) in GS125 application. In general, the highest salinity increase at the end of the season was calculated in GS125 irrigation application as 48% for the first layer (0-10 cm), 34% for the second layer (10-20 cm) and 45% for the third layer (20-30 cm). These increase rates are values that should be taken into account. As a result, it is recommended to remove the salt accumulation in the soil by an effective washing process through a good drainage system end of the growing season for a sustainable irrigated agriculture.