التفاصيل البيبلوغرافية
| العنوان: |
Effects of applying dairy wintering barn manure of differing C:N ratios directly to pasture on N mineralisation and forage growth. |
| المؤلفون: |
Chrystal, JM, Smith, LC, Monaghan, RM, Hedley, M, Horne, D |
| المصدر: |
New Zealand Journal of Agricultural Research; Sep2016, Vol. 59 Issue 3, p324-331, 8p |
| مصطلحات موضوعية: |
ANIMAL wintering, MANURES, FORAGE, BIOMINERALIZATION, NITROGEN fertilizers |
| مستخلص: |
Two experiments were conducted to examine the effect of applying spent dairy wintering barn bedding (termed ‘manure’) to a pasture soil. An incubation study compared rates of nitrogen (N) mineralisation of manures of differing storage durations (fresh, 2.5 months and 12 months) and C:N ratios (26:1, 22:1, 17:1 and 12:1), added to soil at a rate of 289 mg N kg−1soil. The second experiment was a field trial, conducted in South Otago in southern New Zealand which compared pasture dry matter responses to applications of stored manure (c. 70 kg N ha−1; C:N of 18:1) or urea (30 kg N ha−1) to an unfertilised control. Incubation results indicated the addition of urea as a N source to the manure product at a rate to reduce the C:N ratio to approximately 12:1 resulted in a large increase in apparent net mineralisation. Field experiment results showed that application to pasture of manure with a high C:N ratio (above 18:1) resulted in a period of net N immobilisation and pasture growth restriction although there was no difference in annual pasture growth or grass N uptake. Knowledge of the C:N ratio of a manure product may help guide farmers in determining the best time to apply manure to soil to both maximise pasture growth and minimise potential nutrient losses to the environment. [ABSTRACT FROM AUTHOR] |
|
Copyright of New Zealand Journal of Agricultural Research is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
PDF full text from Publisher 
Full Text Finder