1 Introduction The total global area of pea cultivation amounts to 6.8 million ha of dry peas and 2.3 million ha of green peas ( FAO, 2013 ). Pea yield is determined by genotype variety and agro-climatic conditions in Europe ( Dore et al., 1998 ). In Central and Eastern Europe, pea yield is lower than that in Western Europe. The phenomenon of different seedmass is accepted by farmers because of the natural diversity of the environment. However, the high variability of seedmass becomes a serious problem for certified seed production. In seed production, the
References Antosiewicz Z. 1970. Nasiennictwo. Poradnik Leśnika. Warszawa, SITLiD, PWRiL. Reich P.B., Oleksyn J., Tjoelker M.G. 1994. Seedmass effects on germination and growth of diverse European Scots pine populations. Canadian Journal of Forest Research, 24: 306-320. Sobczak R. 1992. Szkółkarstwo leśne. Warszawa, Wydawnictwo Świat. Sokołowski S. 1931. Prace biometryczne nad rasami sosny zwyczajnej ( Pinus silvestris ) na ziemiach Polski. Prace Rolniczo-Leśne PAU, 5: 1-106. Staszkiewicz J. 1993. Zmienność morfologiczna szpilek, szyszek i nasion. [W
southern India, Biotropica, 29, 271-279, 1997. NORDEN N., DAWS M.I., ANTOINE C., GONZALEZ M.A., GARWOOD N.C., CHAVE J.: The relationship between seedmass and mean time to germination for 1037 tree species across five tropical forests, Functional Ecology 23, 203-210, 2009. PINFIELD N.J., STUTCHBURY P.A., BAZAID S.A., GWARAZIMBA V.EE.: Abscisic acid and the regulation of embryo dormancy in the genus Acer, Tree Physiology 6, 79-85, 1989. RUSANEN M., MYKING T.: Euforgen Technical Guidelines for Genetic Conservation and Use for Sycamore ( Acer pseudoplatanus). Rome
Research results on the quality of work of a seed cutter for selected cultivars of sweetcorn were presented. Measurements were carried out at the rotational speed of a head of 1600 rot. min−1 and a linear velocity of the cob conveyor of 0.31 m s−1. A statistically significant relation between the degree of cutting the seed mass and the selected mechanical properties of grain were determined. Differences between cultivars at the level of approximately 43% for the force of perforation of the peri-carp Fp,
The aim of this study was to evaluate the allelopathic effect of cold aqueous extracts, both fresh and dry biomass of dodder (Cuscuta epithymum L.) on lucerne (Medicago sativa L.) and bird’s foot-trefoil (Lotus corniculatus L.). Four different varieties of lucerne “Pleven 6”, “Dara”, “Roly”, “Multifoliolate”) and bird’s foot-trefoil (“Gran San Gabriele”, “Leo”, “Local population 1”, “Local population 2”) were studied in order to find some varieties with allelopathic tolerance. Ex-situ experiment was carried out as follows: 100 seeds of each variety were put in Petri dishes between filter paper, both cold extracts of parasitic weed biomass were pipetted at a ratio of 1:20 as against the seed mass and then were placed in a thermostat-operated device at a temperature of 22 ± 2°С. Distilled water was used as a control. Percentage inhibition, Index of tolerance and Index of plant development were calculated for assessment of the allelopathic effect of dodder on the early seedling growth, biomass synthesis and initial development of experimental varieties. As a whole, dry weed biomass was found as more toxic for the tested plants than the fresh one. Medicago sativa var. multifoliolate and Lotus corniculatus var. Local population 1 and Local population 2 showed a significant tolerance to the allelopathic influence of Cuscuta epithymum in all studied concentrations of aqueous extract of fresh weed biomass (25, 50 and 100 g l−1) and medium tolerance to aqueous extract of dry weed biomass (concentrations of 25 and 50 g l−1).
The experimental activity was conducted at the Institute of Forage Crops (Pleven) during the period 2016 – 2018. The adaptive ability of 10 broad bean accessions was determined with respect to main quantitative traits based on parametric and nonparametric analysis. The environment influences to the highest degree the traits of 1st pod height, pods number and seed weight per plant. The plant height and seeds number were strongly influenced by the genotype, and the mass of 100 seeds was determined by the genotype × environment interaction. The broad bean accessions can be distributed as follows: Fb 1929 has a high value of the 1st pod height (34 cm) and is characterized by high plasticity and stability; BGE 029055 and Fb 1896 are stable and form a large number of pods per plant (11 – 15); Fb 1896 and Fb 2486 are distinguished with good adaptability and stability, increased seed weight (28.01 and 30.28 g, respectively) and 100 seeds mass (105.48 g and 91.31 g). Accessions BGE 032012 and Fb 2481 represent a selection value in terms of plant height (61.36 and 65.83 cm); Fb 1929 – in 1st pod height (32.46 cm); and BGE 029055, Fb 1896 and Fb 2486 – in pods number (10.59, 9.67 and 11.89). Fb 1896, Fb 2486 and BGE 041470 can be used to develop a new genetic diversity in breeding aimed at increasing the mass of 100 seeds and seed productivity.
Several physical properties of three safflower cultivars (IL-111, LRV51-51 and Zarghan279) at moisture contents of 10, 15, 20 and 25% were determined and compared. All the linear dimensions, geometric mean diameter and sphericity of safflower seeds increase linearly with increase in seed moisture content. The values of geometric properties were higher for IL-111cultivar than the LRV51-51 and Zarghan279 cultivars. The values of the bulk densities decreased, whereas the thousand seeds mass, true density and porosity were increased with increase in seed moisture content. All the gravimetric properties for the three cultivars of safflower were significantly different (p<0.05). The values of the terminal velocity for all cultivars were significantly increased as the moisture content increased. The terminal velocity for the three cultivars of safflower were significantly different (p<0.05). On the two different surfaces, the coefficient of static friction of the IL-111 cultivar was significantly greater than that of the other cultivars. The static coefficient of friction was higher on plywood and lower for galvanized steel. The values of the angle of repose increased with increase of the moisture content. The values of the angle of repose for Zarghan279 cultivar were higher than the IL-111, LRV51-51 cultivars.
The experiment was conducted to study the impact of sowing interval on the yield and yield contributing traits of sesame (Sesamum indicum L.), under the tropical circumstance, during 2016, at the research area present near Faculty of Agriculture, Lasbela University of Agriculture, Water and Marine Science, Uthal, Balochistan. Experimental treatments were comprising three varieties of sesame, SV1 (TS-5), SV2 (TH-6) and SV3 (4002), and cultivated under different three sowing dates, at 15 days interval: S1 = 1st sowing (15 March 2016), S2 = 2nd sowing (1st April 2016) and S3 =3rd sowing (15 April 2016). The results of various observations, i.e. plant height at maturity (cm), 1000-seed weight (g), seed mass (t ha−1), yield index (%) rooting depth (cm) and root weight per plant was found to be significant both for the all the sowing dates and sesame genotypes. Non significant finding was observed in traits of biological yield per plant (g) and root-shoot ratio. Whereas interaction among all the treatment factors was non-significant. Maximum yield and yields contributing parameters was observed in S3 = 3rd sowing (15 April 2016) and sesame genotype SV1 (TS-5), followed by SV2 (TH-6), while minimum yield was noted in S3 = 3rd sowing (15 April 2016) and SV3 (4002) sesame genotypes. On the basis of the coastal agroclimatic condition of district Lasbela, it was concluded that maximum yield production was achieved from the sesame variety (TS-5), as compared to other two sesame (TH-6 and 4002) varieties. Sowing date of sesame at 15th April 2016 was more productive, as compared to the other sowing interval. Coastal climatic condition is feasible for sesame cultivation, especially for the sesame variety (TS-5).
. Matkowski A, Zielińska S, Oszmiański J, Lamer-Zarawska E. Antioxidant activity of extracts from leaves and roots of Salvia miltiorrhiza Bunge, S. przewalskii Maxim., and S. verticillata L. Bioresour Technol 2008; 99: 7892-7896. 8. Jiang HL, Wang XZ, Xiao J, Luo XH, Yao XJ, Zhao YY, Chen YJ, Crews P, Wu QX. New abietane diterpenoids from the roots of Salvia przewalskii. Tetrahedron 2013; 69:6687-6692. 9. Wu GL, Du GZ, Shi ZH. Germination strategies of 20 alpine species with varying seedmass and light availability. Aust J Bot 2013; 61 (5): 404-411. 10. Liu K, Baskin JM
References Akbulut, M., Calisir, S., Marakoglu, T., Coklar, H., 2009: Some physicomechanical and nutritional properties of barberry ( Berberis vulgaris L.) fruits. Journal of Food Process Engineering 32, 497-511. Allen, R. B., Wilson, J. B., 1992: Fruit and seed production in Berberis darwinii Hook., a shrub recently naturalised in New Zealand. New Zealand Journal of Botany 30, 45-55. Hendrix, S. D., Sun, I. F., 1989: Inter- and intraspecific variation in seedmass in seven species of umbellifer. New Phytologist 112, 445-451. Herrera, C.M., 1992: Interspecific