Show simple item record

dc.contributor.authorMao, Y.-T.en
dc.contributor.authorHu, W.en
dc.contributor.authorChau, Henryen
dc.contributor.authorLei, B.-K.en
dc.contributor.authorDi, Hong J.en
dc.contributor.authorChen, A.-Q.en
dc.contributor.authorHou, M.-T.en
dc.contributor.authorWhitley, Samuelen
dc.date.accessioned2021-02-24T01:29:13Z
dc.date.available2020-07-24en
dc.date.issued2020-08en
dc.date.submitted2020-07-22en
dc.identifier.urihttps://hdl.handle.net/10182/13449
dc.description.abstractCrops are usually planted on sloping land in mountainous areas due to limited suitable land area. This results in serious soil erosion and loss of nitrogen (N) and phosphorus (P) to land degradation and water eutrophication. It is important to adopt appropriate cultivation practices to change this situation. However, few long-term in situ measurements are available to assess the magnitude of effects of combined cultivation patterns on soil erosion and nutrient loss from sloping farmland with red soil, as well to quantify N and P losses through runoff and sediment transport. A field trial with the cash crop (CC) Nicotiana tabacum was carried out under natural rainfall conditions on sloping farmland with red soil in Yunnan, China during 2014-2017. Four cultivation patterns were applied. They included NVF (No fertilizer application + Vertical ridge + Film covered), OVF (Optimizing fertilizer application + Vertical ridge + Film covered), OHF (Optimizing fertilizer application + Horizontal ridge + Film covered), and OHFR (Optimizing fertilizer application + Horizontal ridge + Film removed). The first two treatments belonged to the vertical ridge (VR) group, and the remaining treatments belonged to the horizontal ridge (HR) group. Results indicated the HR group performed significantly better than the VR group, especially the OHFR treatment, in terms of the HR group producing average runoff (177.12-182.27 mm), sediment loss (2673.33- 3309.17 kg•ha¯¹), and nutrient loss of total nitrogen (TN) (7.58-7.93 kg•ha¯¹), total phosphorus (TP) (1.00-1.09 kg•ha¯¹) through runoff, TN (3.53-4.72 kg•ha¯¹), TP (2.59-2.76 kg•ha¯¹) through sediment. TN was lost mainly through runoff transport, while TP was lost mainly through sediment transport. On average, the HR group decreased runoff, sediment, total N and P loss by 39% to 73% relative to the OVF treatment, whereas NVF treatment increased 3% to 30% of those (p < 0.05). Under four cultivation patterns, total dissolved nitrogen (TDN) was the dominant form, which accounted for 71-77% of TN. The average percentage of NO₃¯-N/TN was about 45-52%, much higher than NH₄⁺-N/TN of around 8-10% in runoff. Total dissolved phosphorus (TDP) made up about 48-59% of TP in runoff. Redundancy analysis (RDA) showed that sediment, runoff, and soil pH were the three key factors controlling nutrient loss. In conclusion, OHFR is recommended because it consistently outperformed other patterns in terms of reducing runoff, sediment, and nutrient losses.en
dc.format.extent15en
dc.language.isoenen
dc.publisherMDPIen
dc.relationThe original publication is available from - MDPI - https://doi.org/10.3390/agronomy10081071en
dc.relation.urihttps://doi.org/10.3390/agronomy10081071en
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland.en
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectsurface runoffen
dc.subjectsedimenten
dc.subjectnutrient lossen
dc.subjectsloping farmlanden
dc.subjectred soilen
dc.subjectcombined cultivation patternen
dc.titleCombined cultivation pattern reduces soil erosion and nutrient loss from sloping farmland on red soil in Southwestern Chinaen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
dc.identifier.doi10.3390/agronomy10081071en
dc.subject.anzsrc050302 Land Capability and Soil Degradationen
dc.subject.anzsrc079902 Fertilisers and Agrochemicals (incl. Application)en
dc.subject.anzsrc070302 Agronomyen
dc.subject.anzsrc0502 Environmental Science and Managementen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.relation.isPartOfAgronomyen
pubs.issue8en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/PE20
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume10en
dc.identifier.eissn2073-4395en
dc.rights.licenceAttributionen
lu.identifier.orcid0000-0002-9411-9816
lu.identifier.orcid0000-0002-6966-0299
pubs.article-number1071en


Files in this item

Default Thumbnail

This item appears in the following Collection(s)

Show simple item record

Creative Commons Attribution
Except where otherwise noted, this item's license is described as Creative Commons Attribution