5940: Evaluation of nitrogen utilizsation by means of the concept of primary production balance
(2005) Evaluation of nitrogen utilizsation by means of the concept of primary production balance. Paper presented at Researching sustainable systems : first scientific conference of the International Society of Organic Agriculture Research (ISOFAR), held in cooperation with IFOAM and NASAA, Adelaide, South Australia, 21-23 September 2005, page pp. 48-51. International Society of Organic Agriculture Research (ISOFAR), Bonn; Research Institute of Organic Agriculture (FiBL), Frick.
Full text available as: |
Summary
Primary production balance (PPB) indicates the ratio (*) between harvested nutrients and nutrients put into crop production from outside the system (=primary nutrients). The PPB is independent of the final output (crop vs. animal products) and can be used to evaluate different systems (farms). The utilization of nitrogen(N) was evaluated by means of the PPB on nine organic farms, stockless and mixed ones, in eastern Finland.
The mixed farms were able to reach a remarkably higher primary production balance (1.0 – 1.2) compared with the stockless ones (0.5). Values higher than 1.0 indicate recirculation of nutrients. Other components of the high PPB were legumes as nitrogen source and optimum livestock density.
| Document Language: | English |
|---|---|
| Keywords: | nitrogen utilization, nutrient balance, nutrient loading |
| Subject Areas: | Environmental aspects > Air and water emissions |
| Research affiliation: | Finland > MTT Agrifood Research > Ecological Production |
| Total budget (Euro): | 0 |
| Orgprints ID Number: | 5940 |
| Contact: | Koistinen, Riitta |
| Deposited On: | 28 September 2005 |
| EPrint Type: | Conference paper |
| Published?: | Published |
| Peer Review Status: | Peer-reviewed and accepted |
| Related Links: | http://tripunix.mtt.fi/cgi-bin/thw/?%24%7BBASE%7D=arktui&%24%7BHTML%7D=poimvapdocu_eng&%24%7BOOHTML%7D=docu_eng&%24%7BSNHTML%7D=nosyn_eng&%24%7BANDOR%7D=or&%24%7BTRIPSHOW%7D=format%3Dwww_eng&NR=+310-08 |
Archive Staff Only: edit this record
