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Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper
dc.contributor.author | Rodríguez, Alejandra | |
dc.contributor.author | Peña-Fleitas, M. Teresa | |
dc.contributor.author | Padilla, Francisco M. | |
dc.contributor.author | Gallardo, Marisa | |
dc.contributor.author | Thompson, Rodney B. | |
dc.date.accessioned | 2021-01-11T11:42:58Z | |
dc.date.available | 2021-01-11T11:42:58Z | |
dc.date.issued | 2020-12-19 | |
dc.identifier.issn | 2073-4395 | |
dc.identifier.uri | http://hdl.handle.net/10835/9285 | |
dc.description.abstract | 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. | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Capsicum annuum L. | es_ES |
dc.subject | ceramic suction cups | es_ES |
dc.subject | greenhouse | es_ES |
dc.subject | nitrate leaching | es_ES |
dc.subject | NNI | es_ES |
dc.subject | soil solution | es_ES |
dc.subject | soil testing | es_ES |
dc.subject | soil-water extracts | es_ES |
dc.subject | sufficiency values | es_ES |
dc.subject | vegetable crops | es_ES |
dc.title | Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | https://www.mdpi.com/2073-4395/10/12/2000 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |