The influence of term of first cut harvest and macro- and microelements fertilization on seed yield of tetraploid red clover
Mieczysław Wilczek
dziekanat.agbioinz@up.lublin.plKatedra Szczegółowej Uprawy Roślin, Akademia Rolnicza w Lublinie (Poland)
Piotr Wilczek
Katedra Szczegółowej Uprawy Roślin, Akademia Rolnicza w Lublinie (Poland)
Abstract
Two terms of harvesting the first cut (1— bud-froming, 2 — full flowering), three phosphorus and potassium fertilization levels (70 kg P2O5 and 70 kg K2O; 105 kg P2O5 and 105 kg K2O; 140 kg P2O5 and 140 kg K2O per 1 ha) as well as four microelements fertilization levels (0; B — 2 kg; Mo — 0,5 kg; B — 2 kg + Mo — 0,5 kg per 1 ha) were taken into account during investigation on tetraploid red clover (Ulka variety). The field experiment was carried out in 1993–1996 with the use of split-split-plot method on a soil classified as a good wheat type. The yields of tetraploid red clover seed were determined mainly by weather conditions during plants flowering and ripering, which significantly differentiated the basic elements of yield structure. The significantly higher seed yield from the second cut was attained when the first cut was harvested for forage most early —at bud-forming. The applied fertilization levels of macroelements (P, K) did not influence significantly the seed yields. The separate application of boron as well as joint fertilization with boron and molybdenum significantly increased seed yields in relation to the control object. The number of heads per 1 m2 and weight of 1000 seeds were significantly higher. The weight of 1000 seeds and number of seeds per fruit head were the most important components of the seed yield structure.
Keywords:
macroelements, microelements, fertilization, seed yield, first cut harvest time, tetraploid red cloverReferences
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Authors
Mieczysław Wilczekdziekanat.agbioinz@up.lublin.pl
Katedra Szczegółowej Uprawy Roślin, Akademia Rolnicza w Lublinie Poland
Authors
Piotr WilczekKatedra Szczegółowej Uprawy Roślin, Akademia Rolnicza w Lublinie Poland
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