Determination of Yield and Quality of Different Snap Bean Varieties Under Deficit Irrigation

Abstract

In the Konya region, snap bean requires frequent irrigation due to high evaporation and low precipitation during the growing season. However the drought in recent years at Turkey, especially in Konya plain has been one of the most important abiotic stress factor affecting the snap bean production. Several ways to reduce yield losses are deficit irrigation practices, to improve and disseminate the varieties that are tolerant to water stress.In this research, the response of two green bean varieties one of which was improved by Prof. Dr. Önder Türkmen, Horticulture Department of Agriculture Faculty of Selcuk University (S3) and a commercial variety existing in Turkey market (Nazende) to different irrigation water levels under drip irrigation has been investigated. The irrigation treatments included five irrigation water level according the amount of water evaporated from Class-A Pan within 7 days period and based on 5 different crop pan coefficients (kcp1= 1.25; kcp2= 1.00, kcp3= 0.75, kcp4= 0.50 ve kcp5= 0.00) .According to the results, it was found that there were significant differences in yield, pod length, pod width, pod thickness and seed per pod among irrigation levels. No significant differences were observed in yield, pod thickness among varieties. The seasonal water use of the snap bean were ranged from 177 mm to 635 mm for Nazende, 181 mm to 655 for S3. The highest yield was obtained in kcp2 treatment with 3762 kg ha-1 for S3 and kcp1 treatment with 3525.0 kg ha -1 for Nazende. It was not observed significant differences in yield between kcp1, kcp2, kcp3 treatment for both genotypes. Linear relations were found between yield and seasonal water use. The yield response factors (ky) were found 1.24 for both varieties. No differences were observed for pod colour values (L, a, b) among irrigation levels.

Effect of Water Stress on the Yield of Indeterminate-Growth Green Bean Cultivars (Phaseolus vulgaris L.) during the Autumn Cycle in Southern Spain

“…In dry bean cultivars, where complete ripening is needed before harvest, the reduction in vegetative growth did not affect final yield under field conditions in the autumn cycle [3]. In the spring cycle, reduction on applied water commonly reduced yield [5,11,12]; however, some works reported no significant differences between crop pan coefficient 1.25, 1 and 0.75 [14] or under a moderate water stress [12]. In green bean cultivars, the autumn growth cycles produced major yield differences [2,19], although the crop pan coefficient 0.8 decreased the pod length, which could reduce the yield quality [19].…”

“…Irrigation strategies are commonly based on sustained deficit irrigation scheduling. Yield and biomass were usually reduced in deficit irrigation scheduling (among others: in pots experiment [3], in field experiments [5,7,10,11]), but some research in field conditions indicated that deficit irrigation produced a similar yield in fully irrigated crops, even though the vegetative growth was lower [3,[12][13][14]. The results differ when the phenological stage at the timepoint when the water stress is applied was considered.…”

Kaolin Foliar Application Enhanced Physiological Functions and Pods Quality of (phaseolus vulgaris L.) under Deficit Irrigation Regimes

“…The experimental results on green bean color revealed that as the irrigation frequency decreased (irrigation interval increased) greenness increased. When the pod color values were considered, it was concluded that the irrigation water amount has no effect on pod color values [38], [49], [50]. Several studies have shown that the kaolin treatments did not result in any significant effect on fruit soluble solids, firmness and starch index.…”

Snap Bean Plants' Physio-Biochemical Reactions to Plant Growth-Promoting Rhizobacteria to Mitigate the Negative Effects of Drought Stress

“…The achieved results demonstrated that reducing irrigation level decreased snap bean yield attributes. Reductions in yield and its components were formerly reported in water-stressed snap bean(Nemeskéri et al 2018;Süheri et al 2020), which depend upon the severity and duration of the stress. These reductions in yield may be attributed to the reductions in assimilate translocation and dry matter portioning through the impairments of physiological and biochemical processes.…”