2018
DOI: 10.1371/journal.pone.0203116
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Effect of sowing date and water availability on growth of plants of chia (Salvia hispanica L) established in Chile

Abstract: From 2010 to 2014 two trials were performed to assess the effect of sowing date (SD1, SD2) and irrigation treatments (IT1, IT2) on the growth of chia in central Chile, measuring leaf area (LA) and dry matter (DM) as primary parameters and relative growth rate (RGR), net assimilation rate (NAR), leaf weight ratio (LWR), crop growth rate (CGR) and specific leaf weight (SLW) as secondary parameters. Both LA and DM reached maximum values between 640 and 1150 accumulated degree days (ADD). However, LA and DM were 2… Show more

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Cited by 11 publications
(10 citation statements)
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“…In that research, an early increase and a later decrease in RGR were found, and this is commented on by assuming that the plant's basal leaves contribute less to photosynthesis as time passes. Comparison with our data can only be made in a wide sense since we calculated RGR for two long periods, both of which were during vegetative growth, but the explanation in Reference [54] is consistent with our finding of a significant interaction between sowing density and plant stage for RGR. The values of RGR go from a slight non-significant reduction with time in dense plant standings (D1), where it is likely that basal leaves become shaded during growth, to an increase in the second period at lower densities that becomes significant only at 4 plants m −2 .…”
Section: Crop Growth and Forage Yieldsupporting
confidence: 87%
See 1 more Smart Citation
“…In that research, an early increase and a later decrease in RGR were found, and this is commented on by assuming that the plant's basal leaves contribute less to photosynthesis as time passes. Comparison with our data can only be made in a wide sense since we calculated RGR for two long periods, both of which were during vegetative growth, but the explanation in Reference [54] is consistent with our finding of a significant interaction between sowing density and plant stage for RGR. The values of RGR go from a slight non-significant reduction with time in dense plant standings (D1), where it is likely that basal leaves become shaded during growth, to an increase in the second period at lower densities that becomes significant only at 4 plants m −2 .…”
Section: Crop Growth and Forage Yieldsupporting
confidence: 87%
“…Our data on RGR (Figure 3), span one order of magnitude, showing the large effect of sowing density on plant size and growth dynamics. The values at high densities (D1 and D2) are of the same order of those found in a study in Chile [53,54] in which maximum values of 0.15 g g −1 d −1 plant −1 are reported for chia grown at 50 plants m −2 , which corresponds to an intermediate density between our D1 and D2. In that research, an early increase and a later decrease in RGR were found, and this is commented on by assuming that the plant's basal leaves contribute less to photosynthesis as time passes.…”
Section: Crop Growth and Forage Yieldsupporting
confidence: 87%
“…These parameters could be used as indicators to explain the geographic dispersion in chia, especially in places with lower water availability (Cortés et al 2017). For more details on the effect of leaf water potential on growth, see Silva et al 2018. As observed in other species, this mechanism allows chia to maintain healthy water potential gradients, water flow, and turgor pressure under water stress.…”
Section: Osmotic Adjustment In Chia In Response To Water Stressmentioning
confidence: 98%
“…Stefanello, Neves, Abbad, and Viana, (2015) found out that a temperature of 20 • C is optimal for germination of chia. Ayerza and Coates (2005) stated that chia is very sensitive to frost in any development phase and that the minimum and maximum growth temperatures are 11 and 36 • C with an optimum range between 16 and 26 • C. Baginsky et al (2016) and Silva et al (2018) suggested Tb to be 10 • C. There is a lack of cardinal temperatures for early and late reproductive development, which were set as given in Table 3. The Tb for early reproductive phase was dropped from 10 to 7…”
Section: Cardinal Temperatures For Development Growth Processes and mentioning
confidence: 99%
“…reported that seeds of chia germinated satisfactorily under conditions of temperatures between 20−30 • C. The highest germination percentage and shortest average germination time occurred under constant temperature (25 • C) and alternating temperature Cardinal temperatures ( • C): base (Tb), first optimum (Topt1), second optimum (Topt2), and maximum (Tmax) used for development, photosynthesis, pod addition, and seed growth rate of chia and soybean in the CROPGRO model C with an optimum range between 16 and 26 • C.Baginsky et al (2016) andSilva et al (2018) suggested Tb to be 10 • C. There is a lack of cardinal temperatures for early and late reproductive development, which were set as given in Table3. The Tb for early reproductive phase was dropped from 10 to 7 • C based on a better fit to observed phenology in the two seasons which differed in temperature during early season.…”
mentioning
confidence: 99%