Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal
The black walnut (<em>Juglans nigra L.)</em> is an underutilized fruit in the mid-hills of Nepal. However, the physico-chemical properties of Nepalese black walnut are almost unavailable in the literature. Four walnut growing districts namely Baitadi, Dadeldhura, Jumla and East Rukum sel...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Islamic Azad University
2020-06-01
|
Series: | Journal of Nuts |
Subjects: | |
Online Access: | http://ijnrs.damghaniau.ac.ir/article_673539_d002137aa9ba4452f38dd214ad3cac13.pdf |
id |
doaj-674b3ada158744748240ffeb3b2ddd16 |
---|---|
record_format |
Article |
spelling |
doaj-674b3ada158744748240ffeb3b2ddd162020-11-25T03:25:45ZengIslamic Azad UniversityJournal of Nuts2383-319X2383-34162020-06-01111374610.22034/jon.2020.1890569.1077673539Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of NepalSubas Sunar0Dinesh Bhatt1Bhisma Raj Regmi2Badrika Devkota3Shanker Barsila4Faculty of Agriculture, Agriculture and Forestry University, Rampur, Chitwan, NepalFaculty of Agriculture, Agriculture and Forestry University, Rampur, Chitwan, NepalFaculty of Agriculture, Agriculture and Forestry University, Rampur, Chitwan, NepalMulti-Dimensional Action for Development Nepal, Bharatpur-19, Chitwan, NepalFaculty of Animal Science, Veterinary Science and Fisheries; Department of Animal Nutrition and Fodder Production, Rampur, Chitwan, NepalThe black walnut (<em>Juglans nigra L.)</em> is an underutilized fruit in the mid-hills of Nepal. However, the physico-chemical properties of Nepalese black walnut are almost unavailable in the literature. Four walnut growing districts namely Baitadi, Dadeldhura, Jumla and East Rukum selected and the black walnut collected at commercial maturity from the local markets. The physical properties were assessed following the IPGRI descriptors, whilst chemical composition by the proximate method across the location. The energy content estimated from the fat, protein and carbohydrate values obtained from the proximate content. The nut weight, kernel weight, nut length, nut diameter were found significantly affected by site, while the effect was similar for the kernel ratio (19-23%). A strong positive correlation (r<sup>2</sup> = 0.58) was found between moisture and nut diameter, between moisture and nut weight (r<sup>2</sup> = 0.52) and between nut weight and kernel weight (r<sup>2</sup> = 0.64). The moisture content, crude protein and total ash content were unaffected by site, whilst the crude fibre, crude fat and soluble carbohydrate content were differed by location of sample collection. The proximate revealed the very best fat or oil content in Dadeldhura district (53.05%), the highest crude fibre in East Rukum district (7.26%), whilst the carbohydrate was found highest in the Jumla (24.69%). The low carbohydrate content in walnut of Dadeldhura might be a hint for the drought tolerance genotype of black walnut. It’s still early to conclude the location effect on black walnut quality without a detailed analysis of environmental and genotypic studies.http://ijnrs.damghaniau.ac.ir/article_673539_d002137aa9ba4452f38dd214ad3cac13.pdfblack walnutmid-hillsnut characteristicsproximate composition |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Subas Sunar Dinesh Bhatt Bhisma Raj Regmi Badrika Devkota Shanker Barsila |
spellingShingle |
Subas Sunar Dinesh Bhatt Bhisma Raj Regmi Badrika Devkota Shanker Barsila Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal Journal of Nuts black walnut mid-hills nut characteristics proximate composition |
author_facet |
Subas Sunar Dinesh Bhatt Bhisma Raj Regmi Badrika Devkota Shanker Barsila |
author_sort |
Subas Sunar |
title |
Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal |
title_short |
Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal |
title_full |
Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal |
title_fullStr |
Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal |
title_full_unstemmed |
Physicochemical Properties of Black Walnut (Juglans nigra L.) in the Western Mid-hills of Nepal |
title_sort |
physicochemical properties of black walnut (juglans nigra l.) in the western mid-hills of nepal |
publisher |
Islamic Azad University |
series |
Journal of Nuts |
issn |
2383-319X 2383-3416 |
publishDate |
2020-06-01 |
description |
The black walnut (<em>Juglans nigra L.)</em> is an underutilized fruit in the mid-hills of Nepal. However, the physico-chemical properties of Nepalese black walnut are almost unavailable in the literature. Four walnut growing districts namely Baitadi, Dadeldhura, Jumla and East Rukum selected and the black walnut collected at commercial maturity from the local markets. The physical properties were assessed following the IPGRI descriptors, whilst chemical composition by the proximate method across the location. The energy content estimated from the fat, protein and carbohydrate values obtained from the proximate content. The nut weight, kernel weight, nut length, nut diameter were found significantly affected by site, while the effect was similar for the kernel ratio (19-23%). A strong positive correlation (r<sup>2</sup> = 0.58) was found between moisture and nut diameter, between moisture and nut weight (r<sup>2</sup> = 0.52) and between nut weight and kernel weight (r<sup>2</sup> = 0.64). The moisture content, crude protein and total ash content were unaffected by site, whilst the crude fibre, crude fat and soluble carbohydrate content were differed by location of sample collection. The proximate revealed the very best fat or oil content in Dadeldhura district (53.05%), the highest crude fibre in East Rukum district (7.26%), whilst the carbohydrate was found highest in the Jumla (24.69%). The low carbohydrate content in walnut of Dadeldhura might be a hint for the drought tolerance genotype of black walnut. It’s still early to conclude the location effect on black walnut quality without a detailed analysis of environmental and genotypic studies. |
topic |
black walnut mid-hills nut characteristics proximate composition |
url |
http://ijnrs.damghaniau.ac.ir/article_673539_d002137aa9ba4452f38dd214ad3cac13.pdf |
work_keys_str_mv |
AT subassunar physicochemicalpropertiesofblackwalnutjuglansnigralinthewesternmidhillsofnepal AT dineshbhatt physicochemicalpropertiesofblackwalnutjuglansnigralinthewesternmidhillsofnepal AT bhismarajregmi physicochemicalpropertiesofblackwalnutjuglansnigralinthewesternmidhillsofnepal AT badrikadevkota physicochemicalpropertiesofblackwalnutjuglansnigralinthewesternmidhillsofnepal AT shankerbarsila physicochemicalpropertiesofblackwalnutjuglansnigralinthewesternmidhillsofnepal |
_version_ |
1724596036130832384 |