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Pikula D.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Ten Berge H.F.M.,WUR Plant Research International | Goedhart P.W.,WUR Biometris | Schroder J.J.,WUR Plant Research International
Soil Use and Management | Year: 2016

The apparent nitrogen fertilizer replacement value of farmyard manure (NFRVFYM) was studied in a long-term experiment on a loamy sand soil at Grabow, Poland. The experiment combined five rates of FYM with four nitrogen (N) fertilizer rates in two rotations (RotA and RotB) started in 1980 (Expt1) and, in parallel, 1981 (Expt2). Rotations consisted of potatoes, winter wheat and spring barley, followed by silage maize (RotA) or grass-clover ley (GCL, RotB). We analysed six consecutive cycles. NFRVFYM was much larger in RotB than RotA, due to high N supply from GCL residues combined with likely deficiencies in potassium (K) and/or phosphorus (P), causing weak crop responses to N fertilizer in RotB relative to FYM effects. Devoid of non-N effects, 'true' (as opposed to apparent) NFRVFYM was estimated at 2.0 kg fertilizer-N per tonne of FYM (at equal N offtake), or 2.7 kg/t (at equal DM yield). These values correspond with equivalencies of 0.37 and 0.50 kg fertilizer-N per kg FYM-N. RotB required 25 kg P and 350 kg K/ha/cycle more input than RotA to compensate for higher P and K offtake in GCL compared to maize. The study highlights differences between approaches to assess NFRVFYM, giving larger values at high compared with low N fertilizer rate, and larger values at low compared with high FYM rate. These contrasts reflect drift in the ratio between the agronomic N-use efficiencies of FYM and fertilizer, respectively, and in the ratio between the apparent recoveries of N from these sources. Journal compilation © 2016 British Society of Soil Science. Source


Ten Berge H.F.M.,WUR Plant Research International | Pikula D.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Goedhart P.W.,WUR Biometris | Schroder J.J.,WUR Plant Research International
Soil Use and Management | Year: 2016

Apparent nitrogen fertilizer replacement values of grass-clover leys (NFRVGCL) and farmyard manure (NFRVFYM) were studied in a long-term (24 years) experiment. This paper reports the results for grass-clover leys (GCL). Five rates of farmyard manure (FYM) and four rates of fertilizer nitrogen (N) were applied to two arable rotations (RotA - arable+silage maize; RotB - arable+GCL). Polynomial response surfaces fitted to dry matter (DM) yield and N offtake in the three arable crops were used to assess NFRVGCL by interpolation, at high (Method H) and low (Method L) N fertilizer rates, always comparing RotA and RotB at equal FYM rates. In Expt1 (started in 1980), arable crops in RotB required 188, 246, 270, 295 and 312 kg N/ha less fertilizer per cycle than in RotA, to match the DM yields found at highest fertilizer rate in RotA (Method H). These values refer to FYM rates of 0, 20, 40, 60 and 80 t/ha per cycle, respectively. Corresponding fertilizer savings in Expt2 (started in 1981) were 287, 323, 341, 346 and 337 kg N/ha per cycle. These NFRVGCL values represent savings of 50-83% (Expt1) or 77-92% (Expt2) in N fertilizer applied to the arable phase. Slightly lower NFRVGCL was found by Method L. Extra N offtake in RotB over RotA was a poor estimator of NFRVGCL, showing much lower values and different responses to FYM and fertilizer than NFRVGCL. Mixed leys enable large fertilizer savings in arable rotations. Journal compilation © 2016 British Society of Soil Science. Source


Galazka A.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Gawryjolek K.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy
Postepy Mikrobiologii | Year: 2015

Glomalin is hydrophobic glycoprotein produced by arbuscular mycorhizal fungi (AMF). AMF can excrete glomalin into the soil. Glomalin is an abundant soil protein that could sequester substantial amounts of carbonand natrium on a global scale. It has a positive influence on soil structure by increasing aggregate stability of soil, which correlates linearly with the amount of detected glomalin. Glomalin production has an impact on many environmental factors including soil condition. Its content in soil is dependent on both the types of plants and fungal symbiotic species. Glomalins are especially resistant to destruction and hard to dissolve in water. Their extraction from the soil requires specific conditions: high temperature (121°C) and citrate buffer with neutral or alkaline pH. These properties make glomalins very stable compounds that create a perfect protective "jacket" for soil aggregates against degradation. However, they are also difficult to understand and determining their exact construction is still a challenge. Source


Stanislawska-Glubiak E.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Korzeniowska J.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Hoffmann J.,Wroclaw University of Technology
Przemysl Chemiczny | Year: 2012

Mixed phosphate rock-S fertilizers were used in pot cultures of oat, lupin, maize, mustard and rye to study the distribution of Cu, Mn and Zn between plant tissue and soil. Two-year expts. did not show any increase in Cu content in the plant tissue while an Increase in Zn and Mn contents were obsd. The Mn content In the plants was even much higher than the allowable in animal feed (1000 mg/kg). Source


Stanislawska-Glubiak E.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Korzeniowska J.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy | Hoffmann J.,Wroclaw University of Technology | Kantek K.,Instytut Uprawy Nawozenia i Gleboznawstwa Panstwowy Instytut Badawczy
Przemysl Chemiczny | Year: 2012

Fine and coarse phosphate rocks were compounded with elementary S and used as fertilizer in pot cultures of test plant to study the migration of P and S to soil and soil filtrates. The addn. of S did not result in any solubilization of phosphates. No risk to soil and aquatic environment was obsd. when the phosphate-S ratio was not lower than 10:1. Source

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