2012年
Indirect 15N isotope techniques for estimating N dynamics and N uptake by rice from poultry manure and sewage sludge
Asian Journal of Earth Sciences
- ,
- ,
- ,
- 巻
- 5
- 号
- 2
- 開始ページ
- 63
- 終了ページ
- 69
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3923/ajes.2012.63.69
Sole use of chemical fertilizers as a nutrient source for intensive paddy rice production has likely caused a decline in soil fertility and rice yields. This study examined the effects of poultry manure and sewage sludge application on nitrogen (N) uptake, dynamics and efficiency of usage. A 15N isotope dilution method was used to estimate the amount of N in rice plants derived from the poultry manure and sewage sludge. The results showed that the percentage of 15N recovered from sewage sludge and poultry manure was 19 and 36%, respectively. Most of the N uptake by rice was from the soil and varied from 54-64%. The relative efficiency of poultry manure and sewage sludge was 80 and 85%, respectively. No significant difference was observed in the N loss rate and the N residual into soil post harvesting between the poultry manure and sewage sludge. © 2012 Academic Journals Inc.
- リンク情報
- ID情報
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- DOI : 10.3923/ajes.2012.63.69
- ISSN : 1819-1886
- ISSN : 2152-3509
- SCOPUS ID : 84867814417