Effects of Applied Nitrogen Amounts on the Functional Components of Mulberry (<i>Morus alba</i> L.) Leaves

Sugiyama, Mari; Takahashi, Makoto; Katšube, Takao; Kôyama, Akio; Itamura, Hiroyuki

doi:10.1021/acs.jafc.6b01922

Cited by 21 publications

(16 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plastic pots serve as consumer packaging, plant transportation, a propagation and production receptacle, and sometimes a marketing mechanism. Nearly every floral crop and many nursery crops are grown in plastic pots [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Green Preparation of Straw Fiber Reinforced Hydrolyzed Soy Protein Isolate/Urea/Formaldehyde Composites for Biocomposite Flower Pots Application

Sun

Liao

Zhang³

et al. 2018

Materials

View full text Add to dashboard Cite

The effects of soil burial on the biodegradation of biocomposite flower pots (BFP) made from straw fiber (SF) and hydrolyzed soy protein isolate/urea/formaldehyde (HSPI/U/F) copolymer resin were studied in detail. The microstructure, crystallinity, functional groups, mechanical, degradation and thermal property of the prepared SF with HSPI/U/F copolymer resin have been studied, and the degradation mechanism was also elucidated. XRD results showed that the bond breakage between SF and HSPI/U/F copolymer resin induced a decrease in relative degradation-resistant crystal structures. FTIR spectra showed that the methylolated HSPI units could form a cross-linking network with U/F and SF. The BFP degradation after soil burial was mainly attributed to the effects of microorganisms. The degradation products were environmentally friendly, because they were degradable and could fertilize the soil. In addition, the U/F adhesives were slightly degraded by the microorganisms due to the HSPI in the pots. The TG and DSC results showed that the molecular motion of the BFP matrix could be restricted by the degradation action and the content of HSPI, resulting in decreased crystallization enthalpy and showing good thermal property. The tensile strength of different reinforced samples was not significantly reduced in comparison to U/F resin, and still kept good mechanical performance. Thus, the prepared SF reinforced HSPI/U/F copolymer resins could have good potential for use in the field of biodegradable flower pots because of their good thermal property, mechanical property, biodegradability, and relatively low cost.

show abstract

Section: Introductionmentioning

confidence: 99%

Green Preparation of Straw Fiber Reinforced Hydrolyzed Soy Protein Isolate/Urea/Formaldehyde Composites for Biocomposite Flower Pots Application

Sun

Liao

Zhang³

et al. 2018

Materials

View full text Add to dashboard Cite

show abstract

“…The nutritional value and antioxidant activities of mulberry leaves depend on many factors, such as the cultivar, environmental conditions, type of field, leaf age, time of harvesting, fertilizers, and mode of food administration (Matei et al, 2006;Sugiyama et al, 2016aSugiyama et al, , 2016b. Quality characteristics of mulberry leaves grown in Lithuania have been poorly investigated.…”

Section: Discussionmentioning

confidence: 99%

Influence of Harvest Time on Biologically Active Compounds and the Antioxidant Activity in Leaves of Mulberry Grown in Lithuania

Levickienė

Jarienė

Gajewski

et al. 2017

Not Bot Horti Agrobo

View full text Add to dashboard Cite

The aim of this study was to establish the influence of harvest time on the contents of flavonoid compounds (rutin, isoquercetin, nicotiflorin, and astragalin) and chlorogenic acid, as well as the antiradical activity in white mulberry (Morus alba L.) leaves grown in Lithuania. Mulberry leaves contain a wide range of bioactive compounds, such as flavonoids and phenolic acids, which are responsible for beneficial effects on human health. Leaves from two mulberry cultivars were collected from July to September in 2015-2016. Quantitative determinations of four flavonoids and chlorogenic acid were conducted by HPLC method and antiradical activity using the 2.2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method. The results showed that the total flavonoid contents of mulberry leaves in the two cultivars ranged from 921.92 to 1512.02 mg 100 g −1 (dry matter). The highest accumulated rutin, nicotiflorin, and chlorogenic acid contents and the greatest antioxidant activity were found in the leaves of 'Plodovaja 3'. The bioactive compounds in the leaves of the mulberry cultivars varied over a period of time, where 'Turchanka' and 'Plodovaja 3' accumulated the highest total flavonoid contents in September and August, respectively. In both cultivars, the antiradical activity was highest in September. There were a very strong positive correlations between the antiradical activity as determined using the DPPH method and the chlorogenic acid contents (r = 0.887, p < 0.05) and the isoquercetin contents (r = 0.848, p < 0.05).

show abstract

“…Improvement in mulberry leaf yield and quality due to application of nitrogen was reported by a number of workers (Pain, 1965;Ray et al, 1973;Kar et al, 1997;Ghosh et al, 2015;Sugiyama et al, 2016). For judicious management, soil test based application of nitrogen fertilizer (Kar et al, 2000) is the most viable approach for the maintenance of mulberry plantation in sustainable mode.…”

Section: Introductionmentioning

confidence: 98%

Prediction of nitrogen availability based on soil organic carbon in commercial mulberry vegetation of Eastern India

Kar¹,

Vijay²,

Ghosh³

et al. 2018

J. Soil Sci. Environ. Manage.

View full text Add to dashboard Cite

Appropriate quantification of nitrogen availability in soil is the prerequisite for proper implementation of soil-test based fertilizer-application scheme. But, most of the soil testing laboratories use soil organic carbon level to suggest fertilizer dose for nitrogen and hence, the present study has been initiated to develop prediction equation for estimating available nitrogen content of soil from its organic carbon content to facilitate the implementation of soil test based on nitrogen fertilizer application in mulberry garden. A total of 300 soil samples comprising 100 locations from each of Malda, Murshidabad and Birbhum districts have been analyzed for estimation of organic carbon as well as corresponding available nitrogen content. Analytical data was further subjected to regression analysis and district wise working equations were developed to predict nitrogen availability in soil from its organic carbon content. All the equations registered quite higher R 2 values, significant at 1% level and thus, considered viable to predict nitrogen availability in soil. Moreover, comparison between predicted and observed values of available nitrogen content in some selected soil samples of each of the districts was done to ascertain accuracy of these equations. The accuracy was found reasonable in terms of ±10% variation and thus, the developed equations are competent enough to predict nitrogen availability in soil under mulberry vegetation of the districts under investigation.

show abstract

Effects of Applied Nitrogen Amounts on the Functional Components of Mulberry (Morus alba L.) Leaves

Cited by 21 publications

References 22 publications

Green Preparation of Straw Fiber Reinforced Hydrolyzed Soy Protein Isolate/Urea/Formaldehyde Composites for Biocomposite Flower Pots Application

Green Preparation of Straw Fiber Reinforced Hydrolyzed Soy Protein Isolate/Urea/Formaldehyde Composites for Biocomposite Flower Pots Application

Influence of Harvest Time on Biologically Active Compounds and the Antioxidant Activity in Leaves of Mulberry Grown in Lithuania

Prediction of nitrogen availability based on soil organic carbon in commercial mulberry vegetation of Eastern India

Contact Info

Product

Resources

About