Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field
Different weeding frequencies (WFs)―0WF, 2WF, 4WF, 6WF, and 8WF―were adopted in an organic rice field to investigate their influence on weed types, rice and weed biomass, rice tiller and weed number, N concentration, and N uptake. The study field was located in Tsuruoka, Yamagata, Japan. Rice (cv. S...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/10/1904 |
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| author | Margi Asih Maimunah Valensi Kautsar Putu Oki Bimantara Samuel Munyaka Kimani Ren Torita Keitaro Tawaraya Hideki Murayama Sri Nuryani Hidayah Utami Benito Heru Purwanto Weiguo Cheng |
| author_facet | Margi Asih Maimunah Valensi Kautsar Putu Oki Bimantara Samuel Munyaka Kimani Ren Torita Keitaro Tawaraya Hideki Murayama Sri Nuryani Hidayah Utami Benito Heru Purwanto Weiguo Cheng |
| author_sort | Margi Asih Maimunah |
| collection | DOAJ |
| description | Different weeding frequencies (WFs)―0WF, 2WF, 4WF, 6WF, and 8WF―were adopted in an organic rice field to investigate their influence on weed types, rice and weed biomass, rice tiller and weed number, N concentration, and N uptake. The study field was located in Tsuruoka, Yamagata, Japan. Rice (cv. Sasanishiki) was planted from May to September 2019, and all weeding events were carried out until 49 days after transplantation (DAT) using a rotary weeder. Rice and weed samples were collected at 60, 88, and 110 DAT. <i>Echinochloa crus-galli</i> (<i>E. crus-galli</i>), <i>Schoenoplectus juncoides</i>, and <i>Monochoria vaginalis</i> (Burm. f.) were the most commonly found weeds. High weed diversity was observed at both 6WF and 8WF, <i>E. crus-galli</i> was the dominant weed at 0WF. Compared to 0WF, 2WF displayed a significantly decreased weed biomass. However, at 8WF, the weed biomass was reduced by 79.0%, the rice biomass was increased by 277%, and the rice tiller number was almost three times higher than that at 0WF and 110 DAT. Compared to 0WF, a significantly increased rice N uptake was observed at 4WF, and rice N uptakes achieved at 6WF and 8WF were two and four times higher than those at 0WF, respectively. Higher weeding frequencies provide notable benefits in suppressing weeds and supporting rice growth, especially in N uptake competition with weeds. |
| first_indexed | 2024-03-09T04:40:16Z |
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| id | doaj.art-a6dcfc9654094197a2158530bc7c5415 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T04:40:16Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
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| series | Agronomy |
| spelling | doaj.art-a6dcfc9654094197a2158530bc7c54152023-12-03T13:22:55ZengMDPI AGAgronomy2073-43952021-09-011110190410.3390/agronomy11101904Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy FieldMargi Asih Maimunah0Valensi Kautsar1Putu Oki Bimantara2Samuel Munyaka Kimani3Ren Torita4Keitaro Tawaraya5Hideki Murayama6Sri Nuryani Hidayah Utami7Benito Heru Purwanto8Weiguo Cheng9Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanThe United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, JapanFaculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanThe United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, JapanFaculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanFaculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanFaculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanFaculty of Agriculture, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaFaculty of Agriculture, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaFaculty of Agriculture, Yamagata University, Tsuruoka 997-8555, JapanDifferent weeding frequencies (WFs)―0WF, 2WF, 4WF, 6WF, and 8WF―were adopted in an organic rice field to investigate their influence on weed types, rice and weed biomass, rice tiller and weed number, N concentration, and N uptake. The study field was located in Tsuruoka, Yamagata, Japan. Rice (cv. Sasanishiki) was planted from May to September 2019, and all weeding events were carried out until 49 days after transplantation (DAT) using a rotary weeder. Rice and weed samples were collected at 60, 88, and 110 DAT. <i>Echinochloa crus-galli</i> (<i>E. crus-galli</i>), <i>Schoenoplectus juncoides</i>, and <i>Monochoria vaginalis</i> (Burm. f.) were the most commonly found weeds. High weed diversity was observed at both 6WF and 8WF, <i>E. crus-galli</i> was the dominant weed at 0WF. Compared to 0WF, 2WF displayed a significantly decreased weed biomass. However, at 8WF, the weed biomass was reduced by 79.0%, the rice biomass was increased by 277%, and the rice tiller number was almost three times higher than that at 0WF and 110 DAT. Compared to 0WF, a significantly increased rice N uptake was observed at 4WF, and rice N uptakes achieved at 6WF and 8WF were two and four times higher than those at 0WF, respectively. Higher weeding frequencies provide notable benefits in suppressing weeds and supporting rice growth, especially in N uptake competition with weeds.https://www.mdpi.com/2073-4395/11/10/1904mechanical weedingweed biomassweed density<i>Echinochloa crus-galli</i><i>Monochoria vaginalis</i> (Burm. f.)<i>Schoenoplectus juncoides</i> |
| spellingShingle | Margi Asih Maimunah Valensi Kautsar Putu Oki Bimantara Samuel Munyaka Kimani Ren Torita Keitaro Tawaraya Hideki Murayama Sri Nuryani Hidayah Utami Benito Heru Purwanto Weiguo Cheng Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field Agronomy mechanical weeding weed biomass weed density <i>Echinochloa crus-galli</i> <i>Monochoria vaginalis</i> (Burm. f.) <i>Schoenoplectus juncoides</i> |
| title | Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field |
| title_full | Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field |
| title_fullStr | Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field |
| title_full_unstemmed | Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field |
| title_short | Weeding Frequencies Decreased Rice–Weed Competition and Increased Rice N Uptake in Organic Paddy Field |
| title_sort | weeding frequencies decreased rice weed competition and increased rice n uptake in organic paddy field |
| topic | mechanical weeding weed biomass weed density <i>Echinochloa crus-galli</i> <i>Monochoria vaginalis</i> (Burm. f.) <i>Schoenoplectus juncoides</i> |
| url | https://www.mdpi.com/2073-4395/11/10/1904 |
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