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>Influence of Long—Term Fertilization with Different Minceral Fertilizers and Farmyard Manure on Some Soil Chemical Properties and Crop Yields
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Influence of Long—Term Fertilization with Different Minceral Fertilizers and Farmyard Manure on Some Soil Chemical Properties and Crop Yields
A long-term fertiliztion experiment was carried out in an experimental field in Lyczyn near Warsaw,Poland.Application ofmineral fertilizers ,especially Nfertilizer with and without farmyard manure accel-erated the eacidification process of the soil.Application of 1.6 t CaO ha-1 every four years was essential to maintenance of the soil pHKCl at 5.5-6.6 and base saturation degree above 60% Application of 50 t farmyard manur ha-1 every 4 years,whih contained 46 kg P and 240 kg K,was sufficient to maintain boh the K and P fertility of the soil.Besides,it was beneficial to alleviating soil acidifcation. As a result of long-term unbalanced fertilization,yield responses to N,P and K fertilizers incereased significantly with time.the efficiency of N from farmyard manure was found to be comparable to that of N fertilizer during 1988-1991.
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机译:在波兰华沙附近的利琴(Lyczyn)的一个试验田进行了长期的施肥试验。矿物肥料的施用,特别是有无肥料的肥料加速了土壤的酸化过程。每吨施用1.6 t CaO ha-1四年对于将土壤pHKCl维持在5.5-6.6和基本饱和度高于60%至关重要,每4年施用50吨农家肥manha-1,其中P含量为46 kg,K含量为240 kg,足以维持土壤的钾,磷肥力。此外,有利于减轻土壤酸化。由于长期不平衡施肥,对氮,磷和钾肥的产量响应随时间而显着增加。从农田肥料中获得的氮效率与1988-1991年期间的氮肥相当。
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