Yazar "Rolbiecki, Roman" seçeneğine göre listele

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    Öğe
    Defining Irrigation Scheduling Based on Crop Water Stress Index and Physiological Parameters for Hybrid Corn in Semi-Arid Climate
    (Middle Pomeranian Sci Soc Env Prot, 2022) Ucak, Ali Beyhan; Saltuk, Burak; Rolbiecki, Roman; Atilgan, Atilgan
    The goal of this study is to determine the crop water stress index (CWSI) and irrigation scheduling based on CWSI values, as well as to examine the correlations between CWSI, physiological parameters and grain yield of hybrid corn P31A34 in semi-arid climate conditions. In 2014 and 2015, the upper limit (UL) temperatures at which plants were entirely exposed to water stress were 1.178 & DEG;C and 2.38 & DEG;C, respectively. When the corn grain yield began to decline, the CWSI threshold value was 0.34, indicating the yield limit. Grain yield, crop water consumption, crop water stress index, chlorophyll content, water use efficiency and leaf area index were found to have negative correlations (p & LE; 0.01) with CWSI values in both years of the study. The findings revealed that in semi-arid climate conditions, a maximum of 30% water deficit could be used during the growing period of the corn compared to full irrigation (I100) for water savings and that a water deficit greater than 30% results in considerable grain yield losses. In areas with limited water resources, the moderate water deficit (I70) may be a viable alternative to the I100.
  • [ X ]
    Öğe
    THE EFFECTS OF HIGH TEMPERATURE AND LOW HUMIDITY ON CROP WATER STRESS INDEX OF SEED PUMPKIN PLANTS (Cucurbita pepo L.) IN SEMI-ARID CLIMATE CONDITIONS
    (Univ Life Sciences Lublin, 2024) Ucak, Ali Beyhan; Kociecka, Joanna; Liberacki, Daniel; Saltuk, Burak; Atilgan, Atilgan; Stachowski, Piotr; Rolbiecki, Roman
    This study aimed to evaluate the effects of high temperature and low humidity on the crop water stress index (CWSI) of seed pumpkin plants grown under semi -arid climate conditions to determine the optimum irrigation time. This research unveils the critical impact of high temperature and low humidity on seed pumpkin growth, emphasizing the vital role of the CWSI in optimizing irrigation strategies and seed yield. Moreover, the relationship between CWSI, physiological parameters, and seed yield of the pumpkin was investigated. The mean CWSI values in the I70 (0.40) and I35 (0.56) treatments were 42% and 100% higher, respectively than those in the full irrigation (I100) treatment (0.28). While the I70 treatment showed manageable water stress with minimal impact, the I35 treatment experienced severe stress, significantly reducing crop growth and yield. The mean seed yield (SY) in the I70 treatment increased to 1245.2 kg ha(-1) compared to I35 (903.3 kg ha(-1)) but remained lower than I100 (1339.3 kg ha(-1)). The CWSI had negative correlations (p <= 0.01) with seed yield, chlorophyll content, and leaf area index, while it had positive correlations with water use efficiency and irrigation water use efficiency (p <= 0.01). This study showed that pumpkins could be grown successfully at 30% water deficit conditions, and a water deficit higher than 30% may cause a significant seed yield loss in semi -arid climate conditions. In addition, the results highlight the importance of optimal irrigation and CWSI monitoring for informed irrigation decisions and sustainable agricultural practices. Therefore, moderate water deficit (I70) can be adopted in pumpkin cultivation as an alternative to full irrigation.