A NDVI Analysis Contrasting Different Spectrum Data Methodologies Applied in Pasture Crops Previous Grazing – A Case Study from Ecuador

Cevallos, Luis Nicolas Moncayo; Garcia, Jose Luis Rivadeneira; Suarez, Bryan Isael Andrade; Gonzalez, Cesar Alberto Leiva; Sinde-González, Izar; Campoverde, Jose Antonio Yepez; Maiguashca, Javier; Toulkeridis, Theofilos

doi:10.1109/icedeg.2018.8372375

Cited by 15 publications

(2 citation statements)

References 35 publications

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“…Particle sizes that ranged in the order of 90, 60, and 63 nm were obtained in other studies [ 75 , 97 , 98 ]. Figure 6 b illustrates the MnO NPs, of which 47.73% had diameters between 5–10 nm ( Table 2 ), with these results being similar to previous studies, where the range of MnO nanoparticles were between 6–14 nm, but different to some reported sizes ranging from 65.91 to 110.48 nm [ 99 , 100 ].…”

Section: Resultssupporting

confidence: 86%

Synthesis of Iron, Zinc, and Manganese Nanofertilizers, Using Andean Blueberry Extract, and Their Effect in the Growth of Cabbage and Lupin Plants

et al. 2022

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The predominant aim of the current study was to synthesize the nanofertilizer nanoparticles ZnO_MnO-NPs and FeO_ZnO-NPs using Andean blueberry extract and determine the effect of NPs in the growth promotion of cabbage (Brassica oleracea var. capitata) and Andean lupin (Lupinus mutabilis sweet) crops. The nanoparticles were analyzed by visible spectrophotometry, size distribution (DLS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Solutions of nanoparticle concentrations were applied to cabbage, with solutions of 270 and 540 ppm of ZnO_MnO-NPs and 270 and 540 ppm of FeO_ZnO-NPs applied to Andean lupin. Zinc was used in both plants to take advantage of its beneficial properties for plant growth. Foliar NPs sprays were applied at the phenological stage of vegetative growth of the cabbage or Andean lupin plants grown under greenhouse conditions. The diameter of the NPs was 9.5 nm for ZnO, 7.8 nm for FeO, and 10.5 nm for MnO, which facilitate the adsorption of NPs by the stomata of plants. In Andean lupin, treatment with 270 ppm of iron and zinc indicated increases of 6% in height, 19% in root size, 3.5% in chlorophyll content index, and 300% in leaf area, while treatment with 540 ppm of iron and zinc yielded no apparent increases in any variable. In cabbage, the ZnO_MnO-NPs indicate, at a concentration of 270 ppm, increases of 10.3% in root size, 55.1% in dry biomass, 7.1% in chlorophyll content, and 25.6% in leaf area. Cabbage plants treated at a concentration of 540 ppm produced increases of 1.3% in root size and 1.8% in chlorophyll content, compared to the control, which was sprayed with distilled water. Therefore, the spray application of nanofertilizers at 270 ppm indicated an important improvement in both plants’ growth.

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Section: Resultssupporting

confidence: 86%

Synthesis of Iron, Zinc, and Manganese Nanofertilizers, Using Andean Blueberry Extract, and Their Effect in the Growth of Cabbage and Lupin Plants

et al. 2022

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“…Nevertheless, meat and dairy production in arid, equatorial and tropical regions is often lower than productive in temperate regions due to the lower nutritional quality of forage grasses, infertile soils and adverse climatic conditions (Lee, Davis, Chagunda, & Manning, 2017;B, Heredia-r, Valencia, & Torres, 2021;Meister et al, 2021). Sustainable intensification as a form of production wherein yield increase without adverse environmental impact and without the cultivation of more land, are being largely considered (Barreto-álvarez, Heredia-rengifo, Padillaalmeida, & Toulkeridis, 2020; Nicolás et al, 2018). In tropical regions, forages are the main food source for ruminants, however, the environmental conditions and the management of grasslands directly affect the yield and quality of the pastures, impacting its growth, animal performance, and the functioning of the pastoral ecosystem (Schons et al, 2021;Szymczak et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Prediction of the nutritional values by INRA (2018) feed evaluation system of Megathyrsus maximus subjected to different grazing strategies

Guamán-Rivera

Pincay

Ortiz-Naveda

et al. 2023

JAEID

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Grazing management is a key element to optimize growth cycle of forages, which are enhanced in their chemical composition leading to the reception of greater nutritive values for feeding ruminants. Several studies have showed that the accuracy and precision of the feeding values are critical to achieve this goal, unfortunately, in Ecuador there are not referential data, despite of Megathyrsus maximus is the most forage used by livestock farmers. The predominant aim of the current study was to approach and estimate the feeding values by INRA feed evaluation system of Tanzania grass (Megathyrsus maximus) subjected at different grazing strategies. The statistical design was a randomized complete block, with a 3 × 2 factorial arrangement. Where the treatments were combinations of three grazing frequencies (GF) (30 d; termed GF30, 45 d, GF45 and 60 d, GF60) and two cutting heights (CHs; 30 and 45 cm). The agronomic data did not vary by season effect (P = 0.24 to 0.82), but GF60 had higher plant heigh and dry matter (DM) contents (P < 0.001) than other GF, although with less tiller populations (241 vs. 304 tiller/m2). By CHs effect, Tanzania grass at 30 cm had a greater DM content than 45 cm of CHs (5565 vs. 4221 ± 603 kg/ha-1; P = 0.073). All chemical determinations were affected by GF, CHs and their interaction (P < 0.001 to 0.004) with the exception on ADF between CHs (P = 0.50). Whereas only the CP and ADF values were conditioned by season effect (P = 0.001 to 0.011). Subsequently, Tanzania grass subjected at moderate rest periods and low defoliation intensities showed greater energy and proteins values than traditionally used GF60. Based in these findings, the defoliation frequency had influence on agronomic and chemical characteristics, whilst the feeding values was mainly affected by grazing intensities and weather conditions. So, the best combination regarding nutritive values should be at GF30 and GF45 combined with 45 cm of CHs.

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Evaluation of the Surface Temperature Applied in Aquaculture Based on Satellite Images in Coastal Ecuador

Pérez

Lascano

Sánchez

et al. 2020

Communications in Computer and Information Science

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A NDVI Analysis Contrasting Different Spectrum Data Methodologies Applied in Pasture Crops Previous Grazing – A Case Study from Ecuador

Cited by 15 publications

References 35 publications

Synthesis of Iron, Zinc, and Manganese Nanofertilizers, Using Andean Blueberry Extract, and Their Effect in the Growth of Cabbage and Lupin Plants

Synthesis of Iron, Zinc, and Manganese Nanofertilizers, Using Andean Blueberry Extract, and Their Effect in the Growth of Cabbage and Lupin Plants

Prediction of the nutritional values by INRA (2018) feed evaluation system of Megathyrsus maximus subjected to different grazing strategies

Evaluation of the Surface Temperature Applied in Aquaculture Based on Satellite Images in Coastal Ecuador

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