Przeglądaj wg Autor "Honczarenko, Grzegorz"

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    Nawożenie łąk na pomorzu zachodnim w świetle doświadczeń
    (1961) Honczarenko, Grzegorz; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Uprawy Łąk i Pastwisk
    The raising of the productivenes of lasting greenland in Western Pommerania requires above all another adjustment of water conditions. The adjustment of water conditions, however, does not provide by itself the expected effects, unless it is accompanied by their agricultural utilization. One of the basic elements of utilization is the systematic and rational fertilizing of grassland and pastures. In the light of investigations carried out, the following can be established: meadow — land on mineral soils reacts above all to nitrogenous fertilization where the productiveness of 1 Kg. N was from 18.5 — to 94.7 Kg. of hay — on the average 42.9 Kg. of hay. Nitrogenous fertilization should be applied at the rate of 60— 100 Kg. per ha. fertilization on mineral soils by potassium and phosphorus instead, does not increase the crop. However, potassium — and phosphorous fertilization should also be applied on such grass — land, 'because if nitrogenous fertilization only, is applied phos- phorous and potassium contents might be exhausted to the detriment of yield. In connection with this we find it advisable to apply potassium — phosphorous fertilization, although in smaller doses, on mineral soils too: the doses should be 40 Kg. KoO and 20—30 Kg. P005 per ha. Grass — land on organic soils reacts to phosporous, potassium and nitrogenous fertilization where the productivenes and rentability of these fertilizers is very-high. The productiveness of 1 Kg. K2 O amounts to 15.7 Kg. of hay 1 Kg. P005 to 24.0 Kg. of hay and of 1 Kg. N to 21.8 Kg. of hay. Potassium fertilization should be applied at the rate of GO— 100 Kg. K2O per ha, the phosphorous one ot the rate of 40— 60 Kg. P2O5 and the nitrogenous at the rate of 40— 60 Kg. N per ha. In the light of the investigations we may maintain hat our grass-lands do not need lime fertilizers, which should be applied rather on arable land. Organic fertilizing should be applied, above all, on moor soils at the amount of 200 q. per ha. every 3 —4 years. Covering of grass-land with potato vine ensures a rise in hay yield. The effectiveness of mineral and organic fertilization is greater on newly laid grass-land. Mineral as well as organic fertilization causes great changes in the flora. On a moor meadow with a plant cover of the Calamagrostis epigeios type, the disappearence of calamagrostis epigeios and Agrostis canina under the influence of mainly phosphorous fertilization, has been observed but instead Poa pratensis and Poa trivialis appeared in great abundance. On a newly laid meadow an increase in numbers of Lolium perenne and Phleum pratense, and a decrease of Fcstuca rubra under the influence of mineral fertilizing could be observed. Fertilizing with PK had in effect a considerable increase of the Trifolium pratense. In the ensuing years investigations concerning the effect of fertilizing on the yield as well as on the grass-land flora should be carried out mainly from the point of view of finding out the right amount of nitrogen doses on mineral soils, and the amount of phosphorous, potassium and nitrogen doses on organic soils.