Original research article
Effect of Planting Dates on Quality and Yield of the New Fodder Kale Progenies (Brassica oleracea var. acephala DC) Relative to the Standard
1998, 63 (1-2) p. 87-94
Z. Štafa, Leonella Crnobrnja, I. Danjek
Abstract
The new fodder kale progenies were tested against the standard G. Angeliter on brown anthropogenized aluvial soil with neutral reaction and poor in humus (1.8%) and nutrients, at three sowing dates - in late May, mid-June and in late July. Significantly higher yields of green mass were achived with the M-7 progeny at all sowing dates relative to the standard G. Angeliter, while the M-4 progeny produced significantly lower yields relative to G. Angeliter. With sowings in late May and late July the highest yields of dry matter were produced by the cultivar "Maksimirski visoki" (11.04 and 4.65 t/ha respectively) with no significant difference and with the sowing in mid June the highest yield of dry matter was produced by the M-7 progeny (10.36 t/ha), which is significantly higher in comparison with M-6. With sowing in late May and late July G. Angeliter produced the lowest yields of crude proteins (1792 and 761 kg/ha respectively) and was significantly outyielded by the M-7 progeny (2094) and "Maksimirski visoki" (2015 kg/ha) with the sowing in late May, and with the sowing in late July only by "Maksimirski visoki" (1025 kg/ha). With the sowing in mid June yields of crude proteins varied from 1772 kg/ha (M-7) to 1480 kg/ha (M-4), without significant differences relative to the standard. With the sowing in late May yield of starch units varied from 8038 kg/ha (Maksimirski visoki) to 6923 kg/ha (M-4), CV=14.15%, and with the sowing in late July it varied from 3810 kg/ha to 2800 kg/ha (M-4), CV=15.31%. The standard produced 7167 kg/ha when planted in late May and 3283 kg/ha in late July.
Keywords
fodder kale, new varieties, quality (forage value), yields
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