期刊
PLANT PRODUCTION SCIENCE
卷 17, 期 3, 页码 237-244出版社
TAYLOR & FRANCIS LTD
DOI: 10.1626/pps.17.237
关键词
Digested manure; Long-term experiment; Method of fertilizer application; Nitrogen; Paddy rice; Soil fertility
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [17380161]
- Grants-in-Aid for Scientific Research [17380161] Funding Source: KAKEN
This study investigated the changes in the chemical properties of the plow soil during a 7-year period with yearly application of anaerobically-digested manure (ADM), and the effect of the different ADM application methods on nitrogen (N) uptake by rice plants and the apparent N balance (input N minus output N). Among the treatments significant differences were observed in the pH, total N, and available N in the plow soil. The cumulative N uptake by rice plants in the ADM split application plots was significantly higher than that in single application plots. Consequently, the apparent N balance (input N minus output N) in the single ADM application plots was more positive. This result suggests that split application of ADM is more favorable for N uptake by rice plants. Although the apparent N balance was negative in the plots without N fertilizer, with chemical N and with low ADM, there was no observable decline in the total N and available N in the plow soil. This result implies that input and output of N in these plots were well balanced by additional N supply other than fertilization. On the other hand, the apparent N balance during the 7-year study under standard and heavy application of ADM was positive, indicating the preservation of soil fertility.
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