Effects of Planting Configuration and In-Row Plant Spacing on Photosynthetically Active Radiation Interception for Three Irrigated Potato Cultivars

Abstract

Research studies have evaluated the production of potatoes (Solanum tuberosum L.) grown in conventional and bed planting configurations. However, intercepted photosynthetically active radiation (PAR) from these planting configurations has not been quantified. planting (DAP) was increased 35%, 38%, and 32% for the 5RB and 65%, 69%, 23% for the 7RB relative to the 4RC planting configuration for Ranger Russet, Ranger Norkotah, and Russet Burbank, respectively. Cumulative PAR interception for the season was increased 15%, 16%, and 4% for the 5RB and 23%, 23%, 5% for the 7RB relative to the 4RC planting configuration for Ranger Russet, Ranger Norkotah, and Russet Burbank, respectively. The relationship between intercepted PAR and leaf area for Russet Norkotah during the early vegetative and tuber initiation growth stages was significantly different between the three planting configurations, with intercepted PAR at a given leaf area in the order of 7RB>5RB>4RC. For Russet Burbank, the relationship was significantly different for the 5RB and 7RB compared to 4RC planting configuration only, with intercepted PAR at a given leaf area in the order of 7RB05RB>4RC.

Physiological characteristics of high yield under cluster planting: photosynthesis and canopy microclimate of cotton

“…Few studies have compared light interception and other microclimate characteristics in crops grown in different row-spacing systems, and none have examined cluster planting. Greater light interception has been reported with narrow row spacing in cotton (Gossypium hirsutum L.) (Heitholt et al, 1992) and other crops such as lucerne (Medicago sativa OPEN ACCESS L.) (Mattera et al, 2013), maize (Zea mays L.) (Liu & Song, 2012) and potato (Solanum tuberosum L.) (Tarkalson et al, 2012). Gwathmey and Clement (2010) found that early canopy development (leaf area) and, consequently, early light interception was higher in ultra-narrow rows than with conventional spacing.…”

Potato cultivar BRS F63 Camila has higher yield at lower plant spacing

“…This higher commercial yield of Camila resulted in greater total yield of this cultivar, since there was no difference in non-commercial yield among the studied cultivars ( Table 1). The tuber production with highest mean weight of cultivar Camila, even in the smallest spacing tested (Figure 3a), probably influenced the higher yield of this cultivar, because in smaller plant spacing potato plants tend to produce tubers with lower mean weight as observed on the other cultivars (Queiroz et al, 2013;Tarkalson et al, 2012). Studies report that the productive capacity of potato cultivars may vary according to planting density, due to number, size and mean weight of the produced tubers, which may differ according to plant spacing and cultivar (Fontes et al, 2012), a fact also observed on the cultivars of the present study, which presented variations of these characteristics depending on the density and cultivar used.…”

“…bras., Brasília, v.37, n.1, January-March 2019 S pacing between plants is a fundamental element to obtain better results in potato crop yield. Considering the alternatives associated with crop management, an adequate plant distribution arrangement in the area is a start point for the crop to maximize its development, with better utilization of environmental factors and lower competition between plants for elements such as solar radiation, water and nutrients, by the canopy and the root system (Tarkalson et al, 2012).…”

“…Usually, within certain limits, higher potato yield per area is achieved with greater population (Bussan et al, 2007), that is, almost always dictated by smallest spacing among plants. Yield, mean size and number of tubers produced are affected by plant density (Tarkalson et al, 2012). Results of studies indicate that potato yield, in response to different plant densities, is directly influenced by the environment and by the cultivar (Tarkalson et al, 2012).…”

“…Yield, mean size and number of tubers produced are affected by plant density (Tarkalson et al, 2012). Results of studies indicate that potato yield, in response to different plant densities, is directly influenced by the environment and by the cultivar (Tarkalson et al, 2012).…”