CHEMICAL INVESTIGATION ON SOME WEEDS OF RICE AND MUSTARD CROPS FOR JUSTIFICATION OF ALLELOPATHIC EFFECT
Date
2006-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR.
Abstract
The allelopathic effects of some weeds on germination and growth of rice and mustard seedlings with their chemical investigation were conducted in the
laboratory.This study was performed
on naturally occurring growth factors in.
aqueous extracts of some common weeds viz. Aryl Leersia hexandra), Jaina
(Fimbristylis miliacea), Sushnisak (Marsilea quadrifolia), Masurchana (Vicia
hirsuta), Tita begun (Solanum nigrum) and Bankapi (Gnaphalium affine) with
the attempt for chemical investigation on effective extracts. The boiled and
unboiled extracts' of all the weed species prepared
from whole plant were
used for treating seeds of rice and mustard along with water as control.
Boiled and unboiled extracts of all the weed species significantly
reduced and
delayed germination of rice and mustard seeds compared with control. The
effect of unboiled extract ofJaina showed the lowest germination (82.7 %)
in
rice seed. But the unboiled extract of Aryl mostly
inhibited the root and shoot
length of rice seedlings. The effect of unboiled extract of Tita begun showed
the lowest germination (50.6 %)
in mustard seed and the unboiled extract of
Tita begun inhibited the root and shoot length of mustard seedlings. The root
and shoot length ofrice and mustard were reduced in presence of all the weed
extract. The thin layer chromatography (TLC) examination of crude extract
of Aryl (Leersia hexandra showed four separate compounds at hexane: ethyl
acetate (10:1, v/v) and the crude extract of Tita begun (Solanum nigrum) also
detected four separate compounds at hexane: ethyl acetate (10:1, v/v).
Description
From the ancient of the world, the human being and animal life as whole are dependent
to greatey degree on the plant kingdom. The plant
kingdom supplies us with food, fuel, fodder, shelter, wind breaker and
provides
raw material for clothing, medicine. They also provides acidic
substance e.g. tartaric acid, oxalic acid, citric acid, celicilic acid, butyric acid
and provides gum substance such as lignin, citin, pectin, latex and provides
us dying substance e.g. khayer, tarmaric, jafran, mahedi, etc and provides us
protienious
substance e.g. mithonine, tryptophan, valine, isopropine,
histidine, lysine which essential amino acid only geting from plant. Some
plant supplies us. mineral substance e.g. Ca, Mg, Fe, Co, Cl, K, Mn, Mo, Zn,
S, N, etc which is essential to build human animal body. The vital part of
the plant
is carbohydrate (CHO) which contains galactose, maltose, starch,
cellulose, sucrose, and fructose, supplies energy in human animal body.
Some plant use as pesticide i.e. leaf of biskatali, neem, tobacco, datura, dust
of chili, wood ash etc. We get lipid substance such as triacyl glycerol,
phospholipid, fatty acid, wax etc. Some provides us oil substance, example mustard oil, soybean oil, sunflower oil,
linseed oil, veranda oil and palm oil
etc that contain energy, taste and protect
the skin membrane, maintains the
temperature of the body.
Keywords
Weed Extracts for the Study of Rice Crop., Weed Extracts for the Study of Mustard Crop., . Treatments for the study of Rice seed germination.