Fruits and vegetables are perishable so that they are easily degraded and thus have a short shelf life. Some studies have been carried out intensively to extend the shelf life of fruit with the application of 1-methylcyclopropene (1-MCP) which is an ethylene inhibitor (indirectly) to slow down the ripening process and extend its shelf life. The benefits of using 1-MCP to delay fruit softening have also been published, however the inhibition of ripening and fruit softening by 1-MCP in mango (Mangifera indica) is very limited. 1-MCP delays fruit softening during storage by indirectly inhibiting ethylene synthesis and slowing the activity of cell wall-damaging enzymes, such as pectin methyl esterase (PME). To study the effect of 1-MCP on mango fruit quality and its shelf life, the experiment was carried out by measuring weight loss, colour, firmness, vitamin C, total soluble solids, titratable acidity, and reducing sugars periodically. For all fruit samples, the pulp was chopped, frozen in liquid nitrogen, and then stored at 8°C until further use. The results showed that application of 1-MCP at room temperature did not slow down neither the senescence process nor the shelf life of mango fruit on weight loss, colour, firmness, vitamin C, total soluble solids, titratable acidity, and reducing sugars parameters.

Application of 1-MCP does not slow down the ripening process of Mango (Mangifera indica L)

Earthworms play an important role in mixing soil particles with biochar grains, as well as creating biostructures, and the application of seaweed extract to soil affects the microbes within, as well as plant growth. This study, therefore, aims to investigate the effect of mixing soil, teak leaf biochar, as well as seaweed extract on the arbuscularmycorrhizal fungal (AMF) spores within the biostructures formed, and analyze the effect of applying these biostructures to planting media soil on the growth and yield of local upland rice. Before the experiment, extract stock from Sargassum sp. was diluted with water into five separate concentration levels, 0%, 20%, 40%, 60%, and 80%. Subsequently, 20 individual earthworms were released on the soil surface previously mixed with biochar and seaweed extract in a reactor. The planting media used in this study was soil from the cogongrass area with grain sizes below 4 mm, and about 10% (w/w) of the biostructures formed were added to the media in a polybag, then the mixture was transplanted with upland rice seedlings of local variety Sorawolia.According to the results, the treatment containing had the highest total AMF spores. Furthermore, the addition of biostructures significantly affected plant height, leaf number as well as area, and the number of tillers at 42, 42 to 70, and 70 days after application, respectively. Meanwhile, the highest plant dry weight and panicle length were obtained from the treatments containing 80% and 60% extract stock, respectively. However, there was no significant difference in the spikelet number and percentage of filled spikelets between the biostructures. Therefore, the application of both teak leaf biochar and extract of Sargassum sp. was concluded to be able to improve the performance of earthworms (Pheretima sp.) in creating soil biostructures containing AMF spores, for local upland rice development in conditions of poor soil fertility. However, future studies are required to investigate this application’s potential as a source of inoculum for AMF spores or other beneficial microbes, for application at the smallholder farm level.

The Effect of The Application of Soil Biostructures Created Using Biochar and Seaweed Extract on Upland Rice Growth

Seaweed extract is known to contain nutrients and growth-regulating substances that affect soil biota, and a source of protection against pests and diseases. Earthworm, which is an example of a soil biota and playing the role of ecosystem engineer, has the ability to produce suitable land biostructures, for the inhabitation of arbuscular mycorrhizal fungi (AMF), which has an impact on upland rice growth. Therefore, this study aims to determine, (i) the effect of seaweed extract on the population of earthworms and spores of arbuscular mycorrhizal fungi, and (ii) the impact of the engineered soil on the growth of local upland rice varieties. Furthermore, the extract of seaweed, such as Kappapychus alvarezii, was divided into five concentration levels, namely 0%, 20%, 40%, 60%, and 80%. Each treatment was drenched into the soil from the cogongrass vegetated area, mixed with 20 Pheretima sp., and maintained for 49 days in the greenhouse. The result showed that the total difference in the earthworms’ concentration treatments was not significant. It also showed that the total AMF spores in the engineered soil products of 20% concentration was the highest. Based on treatment with the earthworm engineered soil products, the highest and lowest vegetative growth and yield components of upland rice were observed at the concentrations of 80% and 0%, respectively. In conclusion, the application of seaweed extract to the soil did not significantly reduce the earthworm population. The extract concentration of 20% also increased the total AMF spore in the engineered soil. Moreover, highly treated engineered soil products increased the growth and yield components of upland Kambowa rice on cogongrass soils.

https://doi.org/10.1088/1755-1315/951/1/012003

Seaweed extract effect on arbuscular mycorrhizae spore in soil engineered by earthworm, and the soil effect on upland rice growth

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The Effect of The Application of Soil Biostructures Created Using Biochar and Seaweed Extract on Upland Rice Growth

Seaweed extract effect on arbuscular mycorrhizae spore in soil engineered by earthworm, and the soil effect on upland rice growth