Scientific journal

European Journal of Natural History

ISSN 2073-4972

ИФ РИНЦ = 0,301

In our country the area sown with legume crops is almost insignificant. In order to increase the production of these plants in our country the main task is to create new productive varieties, mechanization of their harvesting and introduction in farms. Considering the diversity of soil and climatic conditions, it is necessary to create varieties of intensive type by selecting high yielding, disease resistant, mechanized varieties for the regions. Therefore, it is necessary to conduct ecological experiments of the faba bean plant in different regions of our republic, determine the superior characteristics and create by breeding suitable varieties for each region [1; 2].

More recently, simpler devices have been used to study drought tolerance. For example, the water-holding capacity of the leaves can be determined with the «Turgorometer-1», and the change in temperature at planting level due to transpiration in the leaves with an infrared thermometer. The drought tolerance of wheat and ramson has been evaluated using these devices [3]. Other methods are used to determine the weight of the root system of faba bean plants [4], grain yield, number of days to flowering, shortening of the growing season, etc. [5]. to nozzle permeability, product index [6]. The effects of drought on plant height and development, 100 seed weight, yield, chlorophyll content [7], root system and dry biomass of 40 faba bean samples cultivated under different conditions of water supply were studied [6].

Drought adversely affects plant growth and productivity. The resilience of plants to drought stress depends on their species and the degree of water loss. Some varieties can withstand drought stress because they use water more efficiently.

As a result of drought stress, oil, starch and carbohydrates, various oils, esters and synthesis of specific substances are impaired. Conversely, the amount of protein starts to increase. Literature reviews show that varieties grown in arid regions have higher protein and starch content than varieties grown in humid and irrigated areas. A high protein content increases the energy of the plant and reduces water loss, preventing plant mortality.

Materials and methods of research

Research work was carried out at Absheron experimental base of RICH in 2017-2018, 2018-2019, 2019-2020 and 2020-2021. The Apsheron Peninsula is located on the western coast of the Caspian Sea near the 40th parallel, N400 31.957’ north latitude and E49052.525’ east longitude, at 6 m above sea level. The area has hot and dry summers and mild winters. Average annual temperature in the area is 10-140C, the average temperature in January is -10C to 50C, and the average temperature in June is 21-270C. The average annual wind speed, typical for the region, is 4-8 m/s. Mostly northern winds dry out the soil, which increases the water demand of plants. The average annual precipitation on Apsheron Peninsula is 311 mm and is distributed unevenly. Most precipitation falls in autumn and winter and 10% falls in spring.

Soil in Apsheron peninsula is heterogeneous, mainly greyish-brown, poorly nutrient-depleted, alkaline and carbonatised. In terms of mechanical composition, soils are mainly clayey, sandy and poorly structured. The amount of total humus in arable layer is small and amounts to 1.27-1.32%. There are very few readily available forms of nutrients in the soil. In this soil type, the faba bean plant has a high demand for nutrients. Three nurseries containing 234 varieties of faba bean from the ICARDA International Centre were taken as research material. These include the International Ascochytosis Immunity Nursery (FBIABN), the International Brown Spots Immunity Nursery (FBICSN) and the International Mechanical Harvest Nursery (FBIMHN).

The International Classification of cultivated Vicia faba species, URBI of the All-Russian Institute of Botany, State Variety Testing of Agricultural Plants (1989), International Biodiversity Institute Methodology for determining a key set of characteristic and evaluation descriptors of faba bean (Vicia faba) – methodology were used to examine samples [7].

During the study, phenological observations of plants were made, and the resistance of samples to diseases and the dormancy period, the duration of the growing season of plants, height, position in the field, height of lowest pod –bearing node were evaluated. Height, number of grains in the pod, width, length of the pod, weight of 100 grains and yield were determined on a Turgonometer-1 device (Fig. 1,2).

As can be seen from the Table, drought stress had a negative effect on plant growth and productivity. The response of the varieties we studied to the drought was different. In this regard, the effect of drought on the design elements was different (Table 1). The drought-tolerant varieties had growing season of 210-217 days, height of 1 pod 10-40 cm, plant height 35.6-76.0 cm, number of seeds in pod 3, pod width 1.0-1.4 cm, length 6, 8-9.3 cm, yield varied from 60-471 g/m 2. The growing season for moderately drought resistant varieties was 211-217 days, the height of 1 pod 15-38 cm, plant height 31.3-76.3 cm, the number of seeds in a pod 3-4 pcs, pod size – width 1.0-1.3 cm, length 6.7-9.8 cm , the yield varied between 139-513 g/m 2 . In less drought-resistant varieties growing season 211-217 days, height of 1 pod 10-40 cm, height of the plant 31,3-86,3 cm, the number of seeds in a pod 3, pod width 1,0-1,3 cm, length 6,7-9,4 cm, the yield varied in the range 100-509 g/m2.

Fig. 1. Faba bean – Vicia faba.L (inflorescence)

Fig. 2. Faba bean – Vicia Faba.L (height measuring)

St. VIFA2-93 was moderately drought-tolerant according to the turgor index measured by the Turgorometer-1 in a local variety sample of 0.6. In the variety samples presented in Table 2, the drought tolerance was in the range (0.8-0.9). As a result of the research we can say that these varieties are suitable for the Absheron zone as drought tolerant and promising varieties (Table 2).

During the growing season, the height of the faba bean plant was measured during germination and emergence, vegetative, reproductive, pod senescence and stem senescence stages.

Table 1

Turgor and morphobiological indices of varieties of faba bean belonging to different nurseries

Table 2

Drought tolerance of faba bean varieties

The observation shows that the resistance to Ashichytosis in the nursery (FBIABN-18) increased with plant height and varied between 65 and 104 cm. In St. VIFA-2-93, the plant height index was 87-88 cm. The lowest index was 65 cm in sample FLIP16-190 and the highest index was 104 cm in sample FLIP17-022FB.

The observation shows that resistance to brown spot disease in the nursery (FLIP18) gradually increased with plant height, the plant height varied between 47 and 76 cm. In VIFA2-93, plant height ranged from 62-71 cm. The minimum value was 47 cm for FLIP16-200 and the maximum value was 76 cm for FLIP17-038FB.

Table 3

Correlation between morphobiological parameters of faba bean varieties

NOTE: PH – plant height, HLPN – height of lowest pod –bearing node, NBP – Number of Beans per pod, NSP –number of seeds per plant, PL –pod length, 100SW – 100 seeds weight, SY – seed yield.

The height of the plants in the nursery suitable for mechanized harvesting (FLIP18) gradually increased, the height of the plants varying between 51 and 72 cm. The plant height of VIFA2-93 was 58 cm. The lowest value was 51 cm for FLIP16-211 and the highest was 72 cm for FLIP16-210 (Table 3).

A correlation between morphobiological indices in the studied faba bean cultivars was established.

Conclusion

1. 10 promising drought tolerant (0,8-0,9) variety samples were selected from the nurseries of the faba bean for various purposes, introduced from the International Breeding Center ICARDA, and used for creation of a source material for breeding.

2. During the growing season the height of the faba bean plants during the germination and emergence, vegetative, reproductive, pod senescence and stem senescence stages was measured in 12 varieties of resistance to ashichytosis disease in nursery (FBIABN), resistance to brown spot disease in nursery (FBIKSN) in 3 mechanized harvesting conditions in nursery (FBIIMHN) in 11 varieties was higher than in local varieties St.VIFA-2-93.

3. Rebeya 40; FLIP17-010FB; FLIP-008FB; FLIP-032FB; FLIP16-202; FLIP17-055FB; FLIP17-033FB; FLIP16-200; ELIZAR; It was determined that the samples of variety Egypt-3 are important as a donor form in future breeding work. The recommended optimum biometric dimensions of plants to create a model variety of horse bean with high grain yield under the irrigation conditions of Absheron : plant height 65-100 cm, height of lowest pod –bearing node 18-25 cm, number of beans per plant 25-35, number of beans in 1 plant 9-15 cm, length 8-10 cm, bean width15-19 mm, weight of 100 grains 80-130 grams..

4. The positive correlation was ovserved between height of lowest pod –bearing node (r=0,854*), number of grains per plant and number of beans per plant (r=0,982**), length of pod and number of grains per plant (r=0,986**), grain yield and height of plant (r=0,950*), grain yield and number of grains per plant (r=0,947*) and number of pods (r=0,894*).