Stärke‐ und Amylosegehalte in blattreichen und blattarmen Sorten von Mark‐ und Futtererbsen

Starch and amylose content in conventional and semi-leafless cultivars of garden and field peas Small-plot experiments were carried out with conventional and semi-foliated cultivars of garden and field peas (Pisum sativum, ssp. medulare and ssp. sativum) to investigate the effect of increasing potassium dressings on starch, amylose and sugars in mature seeds during two years. Field peas compared with garden peas produced: (1) 2 times higher seed yields, (2) 1.6 times higher starch contents (41–44 % DM), (3) nearly comparable amylose contents (17 % DM), (4) 3 times higher amylopec-tin contents (26 % DM), (5) 4 times lower sugar contents (1.6 % DM). In the presently existing cultivars field peas are by far superior to garden peas with regard to amylose production per area. Compared with conventional cultivars the semi-leafless types of both subspecies yielded the same seed weights, and they differed in no respect in the seed components analysed. Improved potassium nutrition increased yields of seeds and straw, but had no significant effect on the seed components analysed.