Characteristics of mechanical composition and mineral composition of cultivation land the former Dang Xa – Le Chi area, Gia Lam, Hanoi city

2025-08-12T15:09:19+07:00

The land specialized for vegetable cultivation extending from the former Dang Xa through Le Chi Communes, Gia Lam, is part of the green vegetable belt supplying the inner city of Hanoi. This area is one of the sources of vegetables and fruits for the daily consumption needs of the city. In order to clarifying the characteristics of structure, mechanical composition, mineral composition of cultivation land of the former Dang Xa - Le Chi area, Gia Lam, Hanoi city, the authors have conducted field surveys, dug holes, study the soil profiles through the dug holes and collect soil samples. Combination of analytical methods in the lab such as grain size analysis, the XRD method, scanning electron microscopy (SEM) for fine grain bath, and stereomicroscopy method. The results of the studying soil profiles show that the cultivation land in Dang Xa-Le Chi area compose of mainly young alluvial soil, distributed on the sediments of the Thai Binh Formation. In general, the soil has mainly 2 layers structure: The upper layer: from the surface down to 35-45cm, has the composition of silt, finegrained sand, brown, loose, and organic matter; The lower layer is distributed mainly at a depth of 45-50 cm, the composition of silt-clay is yellow-brown, more solid, in many places containing thin layers with black and yellow-brown laterite spots. For mechanical composition of cultivation land in the study area is mainly loamy soil, heavy silt-clay soil and sandy clay. The mineral composition of coarse-grained bath is mainly quartz, iron hydroxides/oxides with small or little amount of feldspar, rutile, amphibol, micas... In fine-grained batch, quartz also accounts for the majority, followed by illite, kaolinite, montmorillonite, goethite, chlorite. Feldspar and other minerals such as gibsite, amphibol, hematite and calcite account for small amounts. In terms of characteristics of structure, mechanical composition, mineral composition of cultivation land in the study area is quite favorable for the cultivation of short-term, terrestrial crops, including vegetables. The research results will contribute the scientific basis for the sustainable management and development of safe vegetable cultivation areas in the areas.

Survey on the ability to collect honey bee venom (Apis Mellifera ligustica) and evaluate the economic potential for beekeeping

2025-11-18T14:17:05+07:00

Bee’s venom (Apitoxin) is a natural toxin containing more than 18 pharmacologically active compounds, including small peptides and enzymes, which play a major role in protecting bee colonies. In traditional Oriental medicine, bee venom has been used to treat inflammatory diseases and pain due to its anti-inflammatory, anti-abscess, anti-fibrotic and anti-arthritis effects. Currently, in addition to traditional beekeeping for honey, many countries in the world such as Australia, Poland, the US, China, etc. have collected bee venom for use in cosmetics and pharmaceuticals to help treat arthritis, dementia, HIV and in anti-cancer research. This study aims to investigate the ability to collect bee venom and its effects on the health of bee colonies (Apis Mellifera ligustica) and honey productivity, conducted at a location in the suburbs of Thu Duc City. The average amount of venom per bee per collection fluctuates from 3.7µg to 6.7µg per collection. The economic value for beekeepers is estimated at 100-200 thousand VND for a beehive with one venom collection. However, the venom collection process shows that the average mass of beehives in the venom collection boxes decreased by more than 15% compared to the initial data. From there, it can be seen that the impact of venom collection has a negative impact on the health of honey bee colonies. Further research is needed to find a reasonable frequency of venom collection to ensure the health of bee colonies, increasing the economic value of beekeeping.

VNUHCM Journal of Earth Science and Environment

Characteristics of mechanical composition and mineral composition of cultivation land the former Dang Xa – Le Chi area, Gia Lam, Hanoi city

Survey on the ability to collect honey bee venom (Apis Mellifera ligustica) and evaluate the economic potential for beekeeping