Stikkord: næring

Miljø- og klimaeffekter av fangvekster

| Type artikkel: Faktaark

Kategori: Erosjon, Karbon og karbonlagring, Klima og miljø, Matjord

Fangvekster sås sammen med korn eller etter tidligkulturer for å ta opp overskudd av næringsstoffer og redusere erosjon. Fangvekster øker karboninnholdet i jorda og reduserer ugrasmengden. Fangvekster har lenge vært anerkjent som et vannmiljøtiltak, og studier tyder på at det også er et aktuelt tiltak for å redusere klimagassutslippene fra jordbruket.

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Nitrogen fertilizer replacement value of digestates from three green manures

| Type artikkel: Publisert studie

Kategori: Fôr, Gjødsel, Nitrogen og nitrogenfiksering, Næringsstoffer

Green manure mixtures including legumes and forbs can help to increase N availability in organic arable systems. Anaerobic digestion of green manures may provide ammonium rich digestate, which can be redistributed as fertilizer. The aim of this study was to investigate the effect of plant species composition, cutting strategy and anaerobic digestion on the N fertilizer replacement value (NFRV) of different green manures.

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Red clover for silage: management impacts on herbage yield, nutritive value, ensilability and persistence, and relativity to perennial ryegrass

| Type artikkel: Publisert studie

Kategori: Gjødsel, Næringsstoffer

This 6‐year experiment quantified the impacts of management factors on red clover yield, persistence, nutritive value and ensilability, and compared these with perennial ryegrass receiving inorganic N fertilizer. Within a randomized complete block design, field plots were used to evaluate a 2 (cultivar, Merviot and Ruttinova) × 2 (alone and with perennial ryegrass) × 2 (0 and 50 kg fertilizer N ha−1 in mid‐March) × 2 (harvest schedule) combination of the factors relating to red clover, and a 2 (harvest schedule) × 4 (0, 50, 100 and 150 kg N ha−1 for each cut) combination of the factors relating to perennial ryegrass.

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Phosphorus bioavailability of sewage sludge-based recycled fertilizers

| Type artikkel: Publisert studie

Kategori: Fosfor, Gjødsel, Næringsstoffer

Six phosphorus (P) fertilizers recycled from sewage sludge [Struvite SSL, Struvite AirPrex,P-RoC, Mephrec, Pyrolysis coal and Ash (Mg-SSA)] were tested for their plant availability in potted soil of pH 7.2 under greenhouse conditions. The crop sequence simulated a rotation of red clover (Trifolium pratense L.), maize (Zea maize L.), and ryegrass (Lolium perenne L.).

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SolACE – Solutions for improving Agroecosystem and Crop Efficiency for water and nutrient use

| Type artikkel: Forskningsprosjekt

Kategori: Agroøkologi, Fosfor, Gjødsel, Matjord, Næringsstoffer, Vann

The goal of SolACE - Solutions for improving Agroecosystem and Crop Efficiency for water and nutrient use - is to help European agriculture face major challenges, notably increased rainfall variability and reduced use of N and P fertilizers for both economic and ecological purposes. SolACE will design solutions (strategies and tools) that combine novel crop genotypes and agroecosystem management innovations to improve water and nutrient use efficiency. It will look at a range of agricultural contexts across pedo-climatic regions and farming systems of Europe.

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