Abstract
Abstract: The objective of this work was to evaluate the effect of the application of calcium oxide (CaO) particle film on the physiological performance, bromatological quality, and productivity of sweet potato (Ipomoea batatas). The experimental design was randomized complete blocks with three treatments (5, 10, and 15% CaO particle film concentrations) and a control (water), with three replicates, applied 30 days after planting. The following parameters were evaluated: physiological, including net photosynthetic rate and Falker chlorophyll index (FCI); bromatological, i.e., crude protein, neutral detergent fiber (NDF), acid detergent fiber (ADF), total digestible nutrients (TDN), dry matter digestibility (DMD), and total carbohydrates; and productivity. The use of the 10 and 15% CaO particle film increased sweet potato photosynthesis, FCI, crude protein content, and tuber and aerial part productivity. At those concentrations, the lowest NDF and ADF contents and the highest TDN and DMD contents were also observed. The use of the CaO particle film at the concentration of 10 and 15% improves the physiological, productivity, and bromatological parameters of the sweet potato crop.
Highlights
Sweet potato [Ipomoea batatas (L.) Lam.] is an essential tuberous root, which has multiple uses, such as animal feed, ethanol production, and, especially in developing countries, human food (Drapal et al, 2019; Silva et al, 2019a)
Sweet potato A, root productivity, and shoot increased with the application of the calcium oxide (CaO) particle film
The values found were superior to those of 4.82 to 7.88 Mg ha-1 reported by Viana et al (2011) when evaluating the yield of branches of different sweet potato cultivars after 150 days of cultivation
Summary
Sweet potato [Ipomoea batatas (L.) Lam.] is an essential tuberous root, which has multiple uses, such as animal feed, ethanol production, and, especially in developing countries, human food (Drapal et al, 2019; Silva et al, 2019a). The bromatological composition of sweet potato branches is highly satisfactory, which makes them an alternative food for animals, due to their high yield, palatability (higher than 62%), and crude protein content (from 11 to 17%) (Aregheore, 2004). These characteristics, associated with a high moisture content, make sweet potato branches a suitable protein supplement for animals that receive low-quality forage in the dry season (Thibodeau et al, 2002)
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