Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper
Excessive N application occurs in greenhouse vegetable production. Monitoring methods of immediately available soil N are required. [NO3−] in soil solution, sampled with ceramic cup samplers, and [NO3−] in the 1:2 soil to water (v/v) extract were evaluated. Five increasing [N], from very N deficient...
| Main Authors: | , , , , |
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| Format: | info:eu-repo/semantics/article |
| Language: | English |
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MDPI
2021
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10835/9285 |
| _version_ | 1789406714970243072 |
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| author | Rodríguez, Alejandra Peña-Fleitas, M. Teresa Padilla, Francisco M. Gallardo, Marisa Thompson, Rodney B. |
| author_facet | Rodríguez, Alejandra Peña-Fleitas, M. Teresa Padilla, Francisco M. Gallardo, Marisa Thompson, Rodney B. |
| author_sort | Rodríguez, Alejandra |
| collection | DSpace |
| description | Excessive N application occurs in greenhouse vegetable production. Monitoring methods of immediately available soil N are required. [NO3−] in soil solution, sampled with ceramic cup samplers, and [NO3−] in the 1:2 soil to water (v/v) extract were evaluated. Five increasing [N], from very N deficient (N1) to very N excessive (N5) were applied throughout three fertigated pepper crops by combined fertigation/drip irrigation. The crops were grown in soil in a greenhouse. Soil solution [NO3−] was measured every 1–2 weeks, and extract [NO3−] every 4 weeks. Generally, for treatments N1 and N2, both soil solution and extract [NO3−] were continually close to zero, and increased with applied [N] for treatments N3–5. The relationships of both methods to the nitrogen nutrition index (NNI), an indicator of crop N status, were assessed. Segmented linear analysis gave R2 values of 0.68–0.70 for combined data from entire crops, for both methods. NNI was strongly related to increasing [NO3−] up to 3.1 and 0.9 mmol L−1 in soil solution and extracts, respectively. Thereafter, NNI was constant at 1.04–1.05, with increasing [NO3−]. Suggested sufficiency ranges were derived. Soil solution [NO3−] is effective to monitor immediately available soil N for sweet pepper crops in SE Spain. The extract method is promising. |
| format | info:eu-repo/semantics/article |
| id | oai:repositorio.ual.es:10835-9285 |
| institution | Universidad de Cuenca |
| language | English |
| publishDate | 2021 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oai:repositorio.ual.es:10835-92852023-04-12T18:55:59Z Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper Rodríguez, Alejandra Peña-Fleitas, M. Teresa Padilla, Francisco M. Gallardo, Marisa Thompson, Rodney B. Capsicum annuum L. ceramic suction cups greenhouse nitrate leaching NNI soil solution soil testing soil-water extracts sufficiency values vegetable crops Excessive N application occurs in greenhouse vegetable production. Monitoring methods of immediately available soil N are required. [NO3−] in soil solution, sampled with ceramic cup samplers, and [NO3−] in the 1:2 soil to water (v/v) extract were evaluated. Five increasing [N], from very N deficient (N1) to very N excessive (N5) were applied throughout three fertigated pepper crops by combined fertigation/drip irrigation. The crops were grown in soil in a greenhouse. Soil solution [NO3−] was measured every 1–2 weeks, and extract [NO3−] every 4 weeks. Generally, for treatments N1 and N2, both soil solution and extract [NO3−] were continually close to zero, and increased with applied [N] for treatments N3–5. The relationships of both methods to the nitrogen nutrition index (NNI), an indicator of crop N status, were assessed. Segmented linear analysis gave R2 values of 0.68–0.70 for combined data from entire crops, for both methods. NNI was strongly related to increasing [NO3−] up to 3.1 and 0.9 mmol L−1 in soil solution and extracts, respectively. Thereafter, NNI was constant at 1.04–1.05, with increasing [NO3−]. Suggested sufficiency ranges were derived. Soil solution [NO3−] is effective to monitor immediately available soil N for sweet pepper crops in SE Spain. The extract method is promising. 2021-01-11T11:42:58Z 2021-01-11T11:42:58Z 2020-12-19 info:eu-repo/semantics/article 2073-4395 http://hdl.handle.net/10835/9285 en https://www.mdpi.com/2073-4395/10/12/2000 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess MDPI |
| spellingShingle | Capsicum annuum L. ceramic suction cups greenhouse nitrate leaching NNI soil solution soil testing soil-water extracts sufficiency values vegetable crops Rodríguez, Alejandra Peña-Fleitas, M. Teresa Padilla, Francisco M. Gallardo, Marisa Thompson, Rodney B. Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title_full | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title_fullStr | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title_full_unstemmed | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title_short | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper |
| title_sort | soil monitoring methods to assess immediately available soil n for fertigated sweet pepper |
| topic | Capsicum annuum L. ceramic suction cups greenhouse nitrate leaching NNI soil solution soil testing soil-water extracts sufficiency values vegetable crops |
| url | http://hdl.handle.net/10835/9285 |
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