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Determination of sowing density and row spacing on the susceptibility of lupine seeds to mechanical damage

Migut Dagmara, Tobiasz-Salach Renata E., Stadnik Barbara, Kuźniar Piotr

Journal of Water and Land Development

2022

Special Issue

156--163

Appropriate agrotechnical measures make it possible to optimise plant cultivation and obtain yields of the highest quality with an appropriate economic production index. The aim of the study was to evaluate different sowing density and row spacing on the morphological and mechanical properties of white lupine (Lupinus albus L.) seeds. The field experiment was conducted at the Experimental Station for Variety Evaluation in Przecław (50°11'25.2" N, 21°28'55.0" E). The experiment was established at two row spacings (15 cm and 30 cm) and three sowing densities (60, 75, 90 plants per m2). Mechanical parameters evaluated included destructive force FD (N), relative deformation DR (%) and destructive energy ED (mJ). Seed morphological properties such as weight, length and width were also assessed. Sphericity was also calculated. In the present study, improvements in the mechanical properties of the seeds were obtained by increasing the plant density per unit area of the experiment. In the case of morphological characteristics, only the weight of the analysed lupine seeds changed significantly as a result of row spacing. On the other hand, sowing density did not significantly affect morphological traits. of white lupine seeds. Apart from the spacing and sowing density of plants, the weather conditions in particular years of research were an important factor determining the properties of seeds. Determining the optimum sowing density and row spacing in the field contributes to the optimisation of the production process. Quasi-static mechanical tests are often used to obtain reasonable data on the physical properties of plant materials.

Szlak żeglugowy Pisy i Narwi - stan aktualny i koncepcje rewitalizacji

Smoliński Błażej, Kuźniar Piotr

Gospodarka Wodna

2020

Nr 5

14--20

W artykule zaprezentowano wyniki pomiarów oraz wizji terenowej przeprowadzonej na rzece Pisie i Narwi we wrześniu 2018 r. Uzyskane wyniki odniesiono do danych archiwalnych oraz aktualnych wymagań prawnych. Scharakteryzowano główne problemy natury techniczno-infrastrukturalnej, które mają limitujący wpływ na rozwój ruchu turystycznego na omawianym szlaku. Omówiono wstępne koncepcje wariantowej zabudowy hydrotechnicznej, której powstanie mogłoby w znaczący sposób poprawić parametry eksploatacyjne szlaku żeglugowego Pisy i Narwi.

The article presents the results of measurements and field vision carried out on the Pisa and Narew river in September 2018. The obtained results were referenced to archived data and current legal requirements. The main problems of technical and infrastructural nature, which have a limiting effect on the development of tourist traffic on the discussed route, have been characterized. Preliminary concepts of a variant hydraulic engineering structure have been discussed, the creation of which could significantly improve the operational parameters of the Pisa and Narew shipping route.