Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization
Recent research demonstrated that fast‐growing tropical legumes [mungbean, Vigna radiata(L.) Wilczek and cowpea, V. unguiculata(L.) Walp.], when used as a green manure for lowland rice (Oryza sativaL.), can increase grain yield by 2 Mg ha−1, and that supplemental inorganic applications increase yiel...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
1986
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| Online Access: | https://hdl.handle.net/10568/167747 |
| _version_ | 1855523701194227712 |
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| author | Morris, R.A. Furoc, R.E. Dizon, M.A. |
| author_browse | Dizon, M.A. Furoc, R.E. Morris, R.A. |
| author_facet | Morris, R.A. Furoc, R.E. Dizon, M.A. |
| author_sort | Morris, R.A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Recent research demonstrated that fast‐growing tropical legumes [mungbean, Vigna radiata(L.) Wilczek and cowpea, V. unguiculata(L.) Walp.], when used as a green manure for lowland rice (Oryza sativaL.), can increase grain yield by 2 Mg ha−1, and that supplemental inorganic applications increase yield further. To guide research on the combined use of inorganic and green manure N, apparent N recovery (kg N uptake kg−1N applied) and N utilization (kg grain kg 1N uptake) were determined in three experiments. The experiments were conducted on a fine mixed isohyperthermic Aeric Tropaqualf in the Philippines during the 1983 and 1984 wet seasons. In two experiments, factorial combinations of inorganic N (0 and 80 kg N ha 1) and green manure growth duration (20, 30, and 40 days in the first year; 25,35, and 45 days in the second year), were tested. Apparent N recoveries from inorganic fertilizer and green manure were 49% in 1983 and 41% in 1984. At N levels < 51 kg N ha−1, inorganic N utilization was inferior to green manure N utilization in 1983 but similar in 1984. In the third experiment, mungbean was planted at 300 000 and 600 000 plants ha−1and grown for 20, 30, and 40 days before incorporation. Inorganic N (80 kg N ha−1) was applied to plots that were fallow during the green manure growth period. Apparent N recovery from both sources was 33%. Utilization of N from 80 kg inorganic N ha−1was slightly more efficient than from an equivalent quantity of green manure N. Although differences were noted, the experiments suggest that apparent recovery and utilization of N from short‐duration green manures are similar to those from inorganic N fertilizers. Research is required to determine how efficiency from the combined use of both N sources can be maximized. |
| format | Journal Article |
| id | CGSpace167747 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1986 |
| publishDateRange | 1986 |
| publishDateSort | 1986 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1677472025-05-14T10:39:39Z Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization Morris, R.A. Furoc, R.E. Dizon, M.A. Recent research demonstrated that fast‐growing tropical legumes [mungbean, Vigna radiata(L.) Wilczek and cowpea, V. unguiculata(L.) Walp.], when used as a green manure for lowland rice (Oryza sativaL.), can increase grain yield by 2 Mg ha−1, and that supplemental inorganic applications increase yield further. To guide research on the combined use of inorganic and green manure N, apparent N recovery (kg N uptake kg−1N applied) and N utilization (kg grain kg 1N uptake) were determined in three experiments. The experiments were conducted on a fine mixed isohyperthermic Aeric Tropaqualf in the Philippines during the 1983 and 1984 wet seasons. In two experiments, factorial combinations of inorganic N (0 and 80 kg N ha 1) and green manure growth duration (20, 30, and 40 days in the first year; 25,35, and 45 days in the second year), were tested. Apparent N recoveries from inorganic fertilizer and green manure were 49% in 1983 and 41% in 1984. At N levels < 51 kg N ha−1, inorganic N utilization was inferior to green manure N utilization in 1983 but similar in 1984. In the third experiment, mungbean was planted at 300 000 and 600 000 plants ha−1and grown for 20, 30, and 40 days before incorporation. Inorganic N (80 kg N ha−1) was applied to plots that were fallow during the green manure growth period. Apparent N recovery from both sources was 33%. Utilization of N from 80 kg inorganic N ha−1was slightly more efficient than from an equivalent quantity of green manure N. Although differences were noted, the experiments suggest that apparent recovery and utilization of N from short‐duration green manures are similar to those from inorganic N fertilizers. Research is required to determine how efficiency from the combined use of both N sources can be maximized. 1986-05 2024-12-19T12:57:40Z 2024-12-19T12:57:40Z Journal Article https://hdl.handle.net/10568/167747 en Wiley Morris, R. A.; Furoc, R. E. and Dizon, M. A. 1986. Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization. Agronomy Journal, Volume 78 no. 3 p. 413-416 |
| spellingShingle | Morris, R.A. Furoc, R.E. Dizon, M.A. Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title | Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title_full | Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title_fullStr | Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title_full_unstemmed | Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title_short | Rice Responses To A Short-Duration Green Manure .2. N Recovery And Utilization |
| title_sort | rice responses to a short duration green manure 2 n recovery and utilization |
| url | https://hdl.handle.net/10568/167747 |
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