Effects of shading on the growth of the purple pakchoy (Brassica rapa var. Chinensis) in the urban ecosystem
Laen...
Kuupäev
2022
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Open green spaces in urban area can be utilized in many ways. Recently, more of the
open spaces have been cultivated for vegetable production, gradually shifted from aesthetical
purpose to the need for fresh healthy foods. Urban vegetable farming can be conventionally
practiced on a limited backyard. Our research was aimed to assess the effects of shading
treatments on growth and yield of purple pakchoi (Brassica rapa var. chinensis). The research
was arranged based on the randomized block design with 4 levels of shading treatment. The
results showed that shading treatments at 0%, 45%, 55%, and 80% significantly affected
morphological growth traits, including plant height, number of leaf, lengths of petiole, length of
leaf midrib, width of leaf blade, canopy diameter, and leaf SPAD index, total leaf fresh and dry
weights, total fresh and dry roots, and lengths of stem; but did not significantly affect the leaf
thickness. In all affected traits, heavier shading inhibited growth, confirming that the purple
pakchoi prefers full sunlight. The leaf of purple pakchoi reached its maximum size at less than
14 days counted from the first day of leaf blade was fully unfolded. Purple pakchoi can be
harvested at 35 days after transplanting. The accurate leaf area estimation in purple pakchoi can
be achieved by using LW as predictor and calculated using the power regression (R² = 0.9806).
Kirjeldus
Received: June 21st, 2022 ; Accepted: September 4th, 2022 ; Published: September 12th, 2022 ; Correspondence: blakitan60@unsri.ac.id
Märksõnad
aesthetic value, fresh vegetable, green space, healthy food, morphological trait, urban farming, articles