MICRONUTRIENT CONTENTS IN THE GREEN MASS OF MIXTURES OF BLUE LUPINE WITH SPRING RYE DEPENDING ON PROPORTION OF COMPONENTS AND TIME OF HARVESTING

  • Anna Płaza Department of Agrotechnology, Siedlce University of Natural Sciences and Humanities, Poland
  • Rafał Górski Department of Agrotechnology, Siedlce University of Natural Sciences and Humanities, Poland
  • Emilia Rzążewska Department of Agrotechnology, Siedlce University of Natural Sciences and Humanities, Poland

Abstract

Background. Mixed crops allow providing feed with a wide range of minerals and a better quality in comparison with crops from pure sowing. The paper presents the results of a study from 2009–2011 aimed at determining the impact of a proportion of components and the time of harvesting mixtures of blue lupine with spring rye on the content of micronutrients in the green mass and their mutual relations. This knowledge allows for the correct selection of species for legume – cereal mixtures for animal feeding.  Material and methods. Two factors were studied in the experiment: I – proportion of components in a mixture: blue lupine – pure sowing 100%, spring rye – pure sowing 100%, blue lupine 75% + spring rye 25%, blue lupine 50% + spring rye 50%, blue lupine 25% + spring rye 75%;  II – time of harvesting: flowering stage of blue lupine (BBCH 65), flat green pod stage of blue lupine (BBCH 79). During the harvesting of mixtures, average samples of fresh mass were collected from each plot for chemical analysis. The content of micronutrients (Fe, Mn, Zn, Cu) was determined in the collected plant material.
Results. Significantly the highest contents of iron, manganese and zinc were recorded in the green mass of blue lupine cultivated in pure sowing and in the mixture of blue lupine with spring rye with proportions of components of 75% and 25%, respectively, harvested at the flat green pod stage (BBCH 79) of blue lupine. Significantly higher content of copper was observed in pure sowing of blue lupine and in the mixture of blue lupine and spring rye with proportions of components of 75% and 25%, respectively, harvested at the flowering stage of lupine. Harvesting the mixtures at the flat green pod stage (BBCH 79) of blue lupine allows obtaining a higher content of iron, manganese and zinc in comparison with harvesting at the flowering stage of blue lupine (BBCH 65).
Conclusion. Cultivation of a mixture of blue lupine with spring rye with a proportion of components of 75% and 25%, respectively, and pure sowing of blue lupine, harvested at the flowering stage of blue lupine (BBCH 65), allows obtaining green mass with a higher content of iron, manganese and zinc as compared with pure sowing of spring rye.

Published
Aug 8, 2018
Section
Original paper