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Register a new userThe Allelopathic effect of cogongrass (Imperata cylindrical L.) in growth of olive seedlings
دراسة التأثير الأليلوباثي للمستخلصات المائية و المسحوق الجاف لعشبة الحلفا Imperata cylindrica L. في نمو غراس الزيتون
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Tishreen University ورقة بحثية
Publication date
2018
fields
Life Science
and research's language is
العربية
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Shamra Editor
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تم إجراء هذه الدراسة لتحديد التأثير الأليلوباثي (التضاد البيوكيميائي ) لعشبة الحلفا Imperata cylindrica في نمو غراس الزيتون Olea europea L. بعمر سنة واحدة، في ظروف المشتل، و قد اعتمد في هذه الدراسة على تجربتين. تم خلال التجربة الأولى، دراسة تأثير المستخلصات المائية لأوراق و جذور وريزومات الحلفا، بالتراكيز التالية 2%،4 %، %8في بعض مؤشرات نمو غراس الزيتون ( طول و قطر الغراس ) ، بينت النتائج أن التركيزين %4و %8 من المستخلص المائي، كان لهما تأثير مثبط في نمو الغراس، حيث انخفض معدل الطول بنسبة %60.2 و%83 على التوالي بالنسبة لطول الشاهد، لوحظ عند التركيز 2% تأثيراً محفزاً للنمو، حيث زاد معدل النمو الطولي للغراس بنسبة 31.5% مقارنة بالشاهد. أما بالنسبة لمعدل نمو قطر الغراس فكان متوافقاً مع معدل النمو الطولي، فعند التركيز2 % كان التأثير الأليلوباثي محفزاً للنمو، و زاد معدل نمو القطر بمقدار %56.8، بينما لوحظ تأثيراً مثبطاً عند التركيزين %4 و 8%، حيث انخفض معدل نمو القطر بنسبة %80 و %91.5 على التوالي. و في التجربة الثانية، تمت دراسة التأثير الأليلوباثي لإضافة المسحوق الجاف لأوراق و جذور وريزومات الحلفا بالتراكيز 2%، 4%،8 %، إلى تربة أصص زراعة الغراس، على طول و قطر الغراس.
This study was designed to estimate the allelophatic effect of cogongrass (Imperata cylindrica L.), in the growth of one year old of olive seedlings, in a nursery (greenhouse) conditions. Two experiments were conducted in this study. In the first experiment, the effect of the aqueous extracts of cognograss leaves, rhizomes, and roots, at concentrations of (2%, 4% and 8%) on the growth of olive seedlings (total length and diameter) were evaluated. The results of this experiment indicated an inhibitory effect of the 4% and 8% aqueous extracts on growth parameters. It was found that treatments with 4% and 8% aqueous extracts caused significant reduction (60.2% and 83%) respectively in the total length, in compare to the control. As for the 2% aqueous extract, it showed a stimulation effect in the growth, an increase about 31.5% was recorded for the total length in compare to the control. A similar result was observed in regard the seedlings diameter growth. The 2% aqueous extract showed an 56.8% increase in the rate of diameter growth, while the 4% and 8% extracts showed a reduction effects 80% and 91.5% respectively. The second experiment evaluated the effect of dried powder of cogongrass parts at concentrations of (2%, 4% and 8%) on the growth of olive seedlings.
References used
ANJUM, T; BAJWA, R; JAVAID, B. Biological Control of Parthenium I: Effect of Imperata cylindrica on distribution, germination and seedling growth of Parthenium hysterophorus L. International Journal of Agriculture and biology. 7(3), 2005, 448-450
AVAV, T. Control of speargrass (Imperata cylindrica (L.) Raeuschel) with glyphosate and fluazifop-butyl for soybean ( Glycine max (L.) Merr) production in the savanna zone of Nigeria. Journal of the Science of Food and Agriculture. 80, 2000, 193-196
CERDERIA, A.L; CANTRELL, C.L; DAYAN, F.E BYRD, J.D; DUKE, S.O. Tabanone, a new phytotoxic constituent of cogongrass (Imperata cylindrica). Weed Sci. 60, 2012. 212–218
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and
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used concentrations used. The highest rate of stimulated stalks legnth of Lepidium
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Portulaca oleracea and Lactuca sativa plants at 2% , and stimulation effect pour
Lepidium sativum, The effect became evident at the concentrations of 4% and 8% for the
three plants.
The most sensitive and affected plants was Portulaca oleracea, where the length of the
root decreased by 53.38% at the concentration of 4% and by 72% at the concentration of
8% ,while the length of the root Lepidium sativum and Lactuca sativa decreased by
25.82% and 34.95% was decreased for 4% and 8%respectively.
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Two irrigation levels: 100% (control) and 75% of water requirements were
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roots in soil, the depth of irrigation water in the soil and the consumption of
water in each level were measured. Results showed that irrigation with 75% of
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