Study

Effects of long-term straw management and fertilizer nitrogen additions on soil nitrogen supply and crop yields at two sites in eastern England

  • Published source details Silgram M. & Chambers B.J. (2002) Effects of long-term straw management and fertilizer nitrogen additions on soil nitrogen supply and crop yields at two sites in eastern England. The Journal of Agricultural Science, 139, 115-127.

Actions

This study is summarised as evidence for the following.

Action Category

Amend the soil with formulated chemical compounds

Action Link
Soil Fertility

Amend the soil with fresh plant material or crop remains

Action Link
Soil Fertility
  1. Amend the soil with formulated chemical compounds

    A controlled, randomized, replicated experiment from 1984 to 1997 on loamy sand and sandy loam in the UK (Silgram and Chambers, 2002) found increased soil mineral nitrogen under increasing nitrogen fertilizer with 54, 60, 65 and 71 kg N/ha in soil receiving 0, 100, 150 and 200 kg N/ha respectively. Soil organic carbon was higher under 250 kg N/ha (14.91 g C/100g) compared to no fertilizer (0.91 g C/100g). There were three residue treatments at two sites: burned straw incorporated (into soil to 15 cm depth), chopped straw incorporated (15 cm depth), and chopped straw not incorporated. All treatments were mouldboard ploughed in autumn to 30 cm depth. Within each treatment were six nitrogen fertilizer treatments: 0-250 kg N/ha increasing by 50 kg a time (winter cereals: wheat Triticum aestivum, barley Hordeum vulgare, oats Avena sativa), 0-150 kg N/ha by 30 kg (spring cereals (barley) and sugar beet Beta vulgaris), and 0-300 kg N/ha by 60 kg (winter oilseed rape Brassica napus). Each nitrogen treatment was 64 m2 at Gleadthorpe and 69 m2 at Morley. Grain and straw samples were used to measure nitrogen content. Soils were samples to 90 cm depth.

  2. Amend the soil with fresh plant material or crop remains

    A controlled, randomized, replicated experiment from 1984 to 1997 on loamy sand and sandy loam in the UK (Silgram and Chambers, 2002) found higher soil mineral nitrogen under burned incorporated straw (51 kg N/ha), then chopped incorporated straw (46 kg N/ha) compared to no incorporation (no straw incorporation was not reported). Overall nitrogen increased under straw incorporation (633 and 429 kg N/ha at Gleadthorpe and Morley respectively). In wet winters, straw incorporation reduced nitrate leaching by 25 kg N/ha/y compared to not incorporating straw. Chopped straw reduced nitrate leaching by 12 kg N/ha/y compared to burned straw. There was no difference in grain yield between straw treatments.  There were three residue treatments at two sites: burned straw incorporated (to 15 cm depth), chopped straw incorporated (15 cm depth), and chopped straw not incorporated. All treatments were mouldboard ploughed in autumn to 30 cm depth. Crops grown included: wheat Triticum aestivum, barley Hordeum vulgare, oats Avena sativa, sugar beet Beta vulgaris, winter oilseed rape Brassica napus. Grain and straw samples were used to measure nitrogen content. Soils were sampled to 90 cm depth.

     

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust