Effect of nitrogen and water availability of three soil types on yield, radiation use efficiency and evapotranspiration in field-grown quinoa

Fatemeh Razzaghi, Finn Plauborg, Sven-Erik Jacobsen, Christian Richardt Jensen and Mathias Neumann Andersen

Agricultural Water Management, 2012, vol. 109, issue C, 20-29

Abstract: Quinoa (Chenopodium quinoa Willd.) is believed to be tolerant to abiotic stress including salinity, drought and poor soil quality. To investigate the effect of soil type and soil-drying during the seed-filling phase on N-uptake, yield and water use, a Danish-bred cultivar (cv. Titicaca) was grown in field lysimeters with sand, sandy loam and sandy clay loam soil. Despite application of the same amount of nitrogen (120kgNha−1) to all plots, there were large differences in crop nitrogen-uptake for sandy clay loam (134kgha−1), sandy loam (102kgha−1) and sand (77kgha−1) under full irrigation. This lead to higher interception of photosynthetic active radiation and higher seed yield on sandy clay loam (3.3Mgha−1) and sandy loam (3.0Mgha−1) than on sand (2.3Mgha−1). The soil with higher clay content had also the highest transpiration, crop evapotranspiration and yield due to the higher uptake of nitrogen. Quinoa is tolerant to soil-drying during seed-filling, and deficit irrigation may improve water productivity and save considerable amounts of irrigation water. The basal crop coefficient (Kcb) and evaporation coefficient (Ke) values were found to be 0.20 and 0.85 for initial, 1.20 and 0.02 for mid, and 0.40 and 0.60 for late stage quinoa development based on sap-flow measurements.

Keywords: Soil-drying; Leaf greenness; Crop coefficient; Seed yield; Nitrogen uptake (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377412000479
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:109:y:2012:i:c:p:20-29

DOI: 10.1016/j.agwat.2012.02.002

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().