Open AccessEffect of sowing density on the agronomic performance of Quinoa Nariño cultivar and the transmissivity of photosynthetically active radiation in the high tropics of Colombia
Author(s) -
Ivan Cruz Díaz,
Hans Nicolás Chaparro Zambrano,
Linda I Díaz,
Gladys Alejandra Romero Guerrero
Publication year - 2021
Publication title -
revista facultad nacional de agronomía medellín
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 7
eISSN - 2248-7026
pISSN - 0304-2847
DOI - 10.15446/rfnam.v74n2.90040
Subject(s) - sowing , leaf area index , photosynthetically active radiation , agronomy , panicle , irrigation , dry matter , yield (engineering) , canopy , cultivar , chenopodium quinoa , phenology , crop , biology , mathematics , horticulture , botany , photosynthesis , materials science , metallurgy
Quinoa is a promissory crop in the Andean region, on average, grain yield was 1.62 t ha-1 with nearly 2,000 t in the year 2017. This study examined the response of quinoa to the radiation transmission, growth, and development of the crop in different stages, under three planting densities in order todetermine the differential responses and identify which aspects are determinants in the planting and development process and crop yield. For the present experiment, quinoa was sowed in three differentdensities: D1 65,500, D2 83,333, and D3 156,250 plants per ha. This study measured the percentage of canopy PAR transmission, distribution of matter on root, stem, leaf, and panicle, leaf development in leaf area and leaf area index, yield components, weight of 1,000 grains, and harvest index. The results showed that sowing density had no impact on PAR transmission, lower sowing densities obtained the best dry weight of panicle at the end of the production cycle, better yields, and best grain weight. To conclude, the sowing density affects different yield components, while all of them allow theplant to generate the best response within the production cycle.