Vihreän parsan viljely- ja lajikekoe v. 1960-71

Authors

• Irma Suhonen Helsingin yliopiston puutarhatieteen laitos

DOI: https://doi.org/10.23986/afsci.71824

Abstract

The growing of green asparagus and the varietal differences of 3 varieties (Connover’s Colossal, Dansk Kaempe, Schneekopf) and 5 improved selections of Washington-type from Davis University, California, were studied in 1960—71. The asparagus was sown in 1960, and planted out in 1961 or 1962. The crowns were spaced 120 cm between rows and 50 cm between plants. The spears were cut at the surface when 12—22 cm or 12—18 cm long. In 1965—71 the harvesting season began 14—20th May and lasted 12—31 days. During this seven years period the average yield was 25 kg/a. In 1965—68 the earlier planting gave bigger yields than the later one. Varieties Schneekopf and Connover’s Colossal gave the highest yields, in average 31 kg/a (16—48 kg/a). The yields of all improved strains were lower than those of old varieties. The average weight of a single spear varied according to variety and maximum length from 16.0 to 22.5 g. The dry matter content of green asparagus was 7.7—8.2 %, the fiber content 2.8—3.4 %, the ascorbic acid content 42 — 55 mg/100 g and the β-carotin content 580—1180 μg/100 g.