Studium porównawcze cech morfologicznych i produktywności lucerny mieszańcowej (Medicago media Pers) uprawianej w czystym siewie i w mieszankach z roślinami motylkowatymi i trawami. Część II [Comparative study of morphological traits and productivity of alfalfa (Medicago media Pers) cultivated in pure sowing and in mixture with papilionaceous plants and grasses. Part II]

Abstract

Plant samples at the and of 1-st cutting were collected from field experiment or from teaching collection in order to determine the degree of relationship of in pairs of traits. The degree of the relationship between investigated was estimated by linear or curvilinear regresion and only equations for which coeficient of determination R² was greated than 0.5 were reported in the paper. Leave surface area from steams of compared species of papilionaceous depended to small degree on the shave of small leaves in this feature (<1/4 x) The magnitude of the total leave surface area depended on large, and mainly average leaves. Increasing number of leaves on the steam had a positive effect on total leave surface area, and moderate linear relation between features was observed (R²=0.70). The order of species according to their decreasing number of leaves on the steam is following: alfalfa-33,4 > bird's foot trefoil-15,2 > red clover-7,9 > sainfoin-5,1. Between the mass of the steam of single species and its length curvilinear relation was observed, which informs about above average influence of longer steams (>70 cm) on yield. Plant mass was poorly correlated with the total steam length. Among single plants (small, average, large) significant differences were observed in the mass of single steams. Share of separated groups of steams in the mass of tops varied greatly and was following: 25% of largest steams decided about the half of its yield. In turn 50% of steams (small and very small) formed only 25% of top yield.