| dc.contributor.advisor | Dr. Md. Shafiqul Bari | |
| dc.contributor.author | PARVIN, ROZINA | |
| dc.date.accessioned | 2022-04-23T04:01:20Z | |
| dc.date.available | 2022-04-23T04:01:20Z | |
| dc.date.issued | 2010-08 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/543 | |
| dc.description | The study of allelopathy (allelochemics) has only become a major thrust in tree
biology in last 30 years. The term allelopathy is a Greek word meaning to suffer
from each other. Allelopathy refers to the inhibition of growth of one plant by
chemical compounds that are released into the soil from the neighboring plants. A
large number of studies have been undertaken in recent years on such allelopathic
interactions between the plants. Allelopathic properties have been reported for
many species, especially trees. Although allelochemicals are present in practically
all plant tissues, including leaves, flowers, fruits, stems, roots, rhizomes and seeds,
information on the nature of active chemicals and their mode of action is lacking.
The effects of these chemicals on other plants are known to be dependent
principally upon the concentration as well as the combination in which one or more
of these substances are released into the environment. Allelopathic effect is an
interaction between different plants or between plants and microorganisms in which
substances (allelochemicals) produced by one organism affect the growth of
another (usually adversely). Allelopathy has traditionally been considered only the
negative chemical warfare of one organism upon another (Bansal, 1994). Modern
research suggests that allelopathic effects can be both positive and negative,
depending upon the dose and organism affected (Bansal and Bhene, 1977; Rice,
1984). Allelopathic is the active or passive effects of chemicals released into the
environment, which influences the releaser, itself or other organs (Chou, 1986;
Hale and Orcutt, 1987, Miller, 1983). Allelopathy signifies that interactions
between plants might lead to either stimulation or inhibition of growth (Molisch,
1937). | en_US |
| dc.description.abstract | A pot experiment was conducted at the Agroforestry Farm, Hajee Mohammad
Danesh Science and Technology University during May 2009 to July 2009 to
observe the allelopathic effects of Albizia lebbeck, Leucaena leucocephala, Melia
azedarach and Litchi chinensis on two agricultural crops viz: mungbean and
soybean. There were four experiments and each experiment had five treatments
viz: T; (top soil); T, (root zone soil); T3 (soil mulched with dry leaf); Ty (soil
watered with aqueous leaf extract); T; (control/fresh garden soil). The experiments
were laid out in the Randomized Complete Block Design (RCBD) with four
replications. The results of the present studies revealed that inhibition of
germination and growth parameters of mungbean and soybean were varied
according to different parts of plants and soil from different place. Incase of
Albizia lebbeck the allelopathic effects of the treatments were as the following
order: T, (soil watered with aqueous leaf extract) > T (root zone soil) >T; (soil
mulched with dry leaf>T, (top soil)>T, (control / fresh garden soil); For Leucaena
leucocephala: T, (soil watered with aqueous leaf extract)>T, (top soil)>T; (soil
mulched with dry leaf) >T; (control / fresh garden soil) >T, (root zone soil ); For
Melia azedarach: T> (root zone soil) >T3 (soil mulched dry leaf) >T, (soil watered
with aqueous leaf extract >T; (top soil > T; control / fresh garden soil; For Litchi
chinensis:T3 (soil mulched with dry leaf)>T, (soil watered with aqueous leaf
extracts)>T, (top soil)>T2 (root zone soil)>T; (control/fresh garden soil). Among
the four tree species Leucaena leucocephala has little stimulatory effects on
mungbean and soybean. In agroforestry system, Leucaena leucochephala is a
better choice as compared to the other tree species like Albizia lebbeck,
Melia azedarach and Litchi chinensis. Although, Melia azedarach is well-known
for its biological activities in many countries, the inhibitory effects were also
observed. However, the allelopathic effects of the trees on the tested crops were as
the following the order: Litchi chinensis > Albizia lebbeck> Melia azedarach>
Leucaena leucocephala. Among the different parts of the trees, fresh leaf extracts
had more inhibitory effects as compared to the other parts of trees like root and
dry leaf. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR. | en_US |
| dc.subject | AGRICULTURAL CROPS | en_US |
| dc.subject | Allelopathy of different multipurpose trees | en_US |
| dc.subject | Preparation and application of the treatments | en_US |
| dc.title | ALLELOPATHIC EFFECTS OF Albizia lebbeck, Leucaenea leucocephala, Melia azedarach AND Litchi chinensis ON AGRICULTURAL CROPS | en_US |
| dc.type | Thesis | en_US |
![No Thumbnail [100%x80]](data:image/svg+xml;base64,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)