Do you want to publish a course? Click here

The 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

1581   2   24   0.0 ( 0 )
 Publication date 2018
  fields Life Science
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

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.


Artificial intelligence review:
Research summary
تم إجراء هذه الدراسة لتحديد التأثير الأليلوبائي لعشبة الحلفا (Imperata cylindrica) على نمو غراس الزيتون (Olea europaea L.) بعمر سنة واحدة في ظروف المشتل. تضمنت الدراسة تجربتين: الأولى تناولت تأثير المستخلصات المائية لأوراق وجذور وريزومات الحلفا بتركيزات 2%، 4%، و8% على بعض مؤشرات نمو غراس الزيتون (الطول والقطر). أظهرت النتائج أن التركيزين 4% و8% من المستخلص المائي كان لهما تأثير مثبط على نمو الغراس، حيث انخفض معدل الطول بنسبة 60.2% و83% على التوالي مقارنة بالشاهد. بينما أظهر التركيز 2% تأثيرًا محفزًا للنمو، حيث زاد معدل النمو الطولي بنسبة 31.5% مقارنة بالشاهد. أما بالنسبة لمعدل نمو قطر الغراس، فقد كان متوافقًا مع معدل النمو الطولي، حيث زاد معدل نمو القطر بنسبة 56.8% عند التركيز 2%، بينما لوحظ تأثير مثبط عند التركيزين 4% و8%. في التجربة الثانية، تمت دراسة تأثير إضافة المسحوق الجاف لأوراق وجذور وريزومات الحلفا بتركيزات 2%، 4%، و8% إلى تربة أصص زراعة الغراس. أظهرت النتائج أن التركيزين 4% و8% من المسحوق الجاف كان لهما تأثير مثبط لنمو الغراس، حيث انخفض معدل الطول بنسبة 50.3% و80% على التوالي. بينما أظهر التركيز 2% تأثيرًا محفزًا للنمو بنسبة 23%. النتائج تشير إلى أن مستخلصات الحلفا المائية والمسحوق الجاف تحتوي على مواد كيميائية ذات تأثير أليلوبائي تفسر قدرتها التنافسية العالية مع المحاصيل الأخرى، ويزداد التأثير المثبط بزيادة التركيز.
Critical review
دراسة نقدية: تقدم هذه الدراسة نظرة شاملة على التأثير الأليلوبائي لعشبة الحلفا على نمو غراس الزيتون، مما يساهم في فهم أعمق للتفاعلات البيوكيميائية بين النباتات. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل توسيع نطاق الدراسة لتشمل تأثيرات طويلة الأمد لهذه المستخلصات والمساحيق على نمو الزيتون. ثانيًا، لم يتم التطرق بشكل كافٍ إلى الآليات البيوكيميائية المحددة التي تؤدي إلى التأثيرات المثبطة أو المحفزة، مما يترك بعض الغموض حول كيفية عمل هذه المركبات الأليلوبائية. أخيرًا، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تم تضمين تجارب ميدانية بجانب تجارب المشتل للحصول على نتائج أكثر واقعية.
Questions related to the research
  1. ما هو التأثير الأليلوبائي لعشبة الحلفا على نمو غراس الزيتون بتركيز 2%؟

    أظهر التركيز 2% من المستخلص المائي لعشبة الحلفا تأثيرًا محفزًا للنمو، حيث زاد معدل النمو الطولي بنسبة 31.5% وزاد معدل نمو القطر بنسبة 56.8% مقارنة بالشاهد.

  2. كيف يؤثر التركيز 4% و8% من المسحوق الجاف لعشبة الحلفا على نمو غراس الزيتون؟

    أظهر التركيزين 4% و8% من المسحوق الجاف لعشبة الحلفا تأثيرًا مثبطًا لنمو غراس الزيتون، حيث انخفض معدل الطول بنسبة 50.3% و80% على التوالي، وانخفض معدل نمو القطر بنسبة 62.7% و88% على التوالي.

  3. ما هي المركبات الكيميائية التي تفسر التأثير الأليلوبائي لعشبة الحلفا؟

    تحتوي مستخلصات الحلفا المائية والمسحوق الجاف على مركبات كيميائية مثل الفينولات والقلويدات التي تمتلك القدرة العالية على التثبيط ومنع النمو والإنبات.

  4. ما هي النقاط التي يمكن تحسينها في هذه الدراسة؟

    يمكن تحسين الدراسة بتوسيع نطاقها لتشمل تأثيرات طويلة الأمد، وتوضيح الآليات البيوكيميائية المحددة التي تؤدي إلى التأثيرات المثبطة أو المحفزة، وإجراء تجارب ميدانية بجانب تجارب المشتل للحصول على نتائج أكثر واقعية.


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
rate research

Read More

Allelopathy uses, as target plants, the cultivated species that are sometimes considered useful for comparative analysis, but do not naturally co-exist with the donor species (Reigosa et al., 2013) . Therefore, the weed common purslane (portulaca ole racea) (Portulacaceae) was selected as a target in addition to alfalfa (Medicago sativa) (Fabaceae) to compare with it. Two worldwide distribution weeds: sterile oat (Avena sterilis), and Aleppo grass (Sorghum halepense) (Poaceae) were chosen as donor plants, Water extracts of donor plants were prepared, 2%,4%,8% concentrations were used and distilled water was used for control. Seed germination and early seedling growth of target plants were studied in petri dishes. Lengths of seedlings were measured, after that, following indicators were calculated: Relative seed germination (RSG), relative elongation ratio of Shoot (RERs) and root (RERr), Inhibition percentage of germination, shoot and root length (I), and root/shoot ratio. Means and standard deviation were calculated and means were statically analyzed with one – way ANOVA, LSD test was chosen to compare differences between treatment means at a probability levels (0.01, 0.05). The result showed that extracts had greater effects on seedling growth rather than on germination and all measurements were affected, extracts had inhibition effects on root length of the two tested species, shoot length of alfalfa, but a stimulation effect on shoot length of common purslane. All root / shoot ratios were significant in all treatments of common purslane, and alfalfa treated with Aleppo grass only, while the seed germination differences were generally non – significant, Aleppo grass extracts were more effective than that of sterile oat, and the effect generally increased by increasing concentration.
Laboratory experiments were conducted to study the effect of the aqueou extract of the vegetative parts of the Euphorbia paralias at different concentrations (2%,4%,8%) in seed germination and seeding growth of the Lepidium sativum, Lactuca sativa and Portulaca oleracea. The results indicated increase in germination ratio of Portulaca oleracea. up to 7%. while the effect of the extract was not evident in the germination of the seeds of Lepidium sativum, and decreased the germination ratio of Lactuca sativa seeds by 35.9% at the concentration of 8%.In contrast, the extracts stimulated the length of the stalks of Portulaca oleracea , Lepidium sativum and Lactuca sativa plants at all used concentrations used. The highest rate of stimulated stalks legnth of Lepidium sativum at 2% was 58.2%. inhibitory effect of water extract observed for root length of 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. The results suggested that this weed may affect seedling growth, due to inhibitory or stimulatory effect of Allelochemicals , which present in water extract of this weed . and may used as potential Bioherbicide after further experiments.
The present investigation was carried out at the Agricultural Scientific Research Center in Swieda to study the effect of deficit irrigation on the growth of four apple seedlings rootstocks genotypes and to estimate their ability to drought tolera nce particularly in light of the lack of water sources and no rain. Two irrigation levels: 100% (control) and 75% of water requirements were applied. The shoot length, leaves number, leaves area, the distribution of the 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 field capacity on studied genotypes caused reduction of shoots length, decline of leaves number and area and the depth of root comparing with the control. There were significant differences between studied genotypes in terms of vigor where the genotypes C and S2 were superior than A and B.
This research was carried out during 2014 - 2015 in Scientific Centre for Agricultural Researches. This research aims to determine the effect of some biological and genetic indicators on the success of Carob seedlings in nurseries by studying three kinds of grafting: Auto-grafting, Homo-grafting and Hetero-grafting. Rootstock aged one year and resulted by two chosen genetic types, namely, SnobarJablah and Alhafa were used. Scions, they were taken either from seedlings with age of one year resulted by these two types or from branches aged one year from the selected two types as well. Grafting was conducted by using Whip Graft way in spring. Auto-grafting has indicated the importance and the role of biological and genetic factors for grafts and their impact on rates of grafting success. Concerning rates of success, the results have shown that Auto-grafting surpassed Hetero-grafting with a significant reference for both of two genetic types, regardless if the used scion was young or old. In addition, Auto-grafting has shown surpass on other kinds of grafting, in terms of subsequent growth of scions. On the other hand, a variety in biological indicators values has been noticed between the two genetic studied types. In favour of SnobarJablahtype againstAlhafaʼs type. However, the differences of values were not significant for the most of conducted measures. As for the age of scions, the results have pointed out that values of Hetero-grafting with young scions surpassed values of Hetero-grafting with old scions in terms of the rate of grafting success and values of biological studied indicators.
The research aimed to study the effect of size of container on the growth of seedlings pepper "Snapper". Two different sizes of plastic containers, with dimensions 8×8 cm and12×12 cm were used, Results showed that the use of containers with large dimensions had increased the growth of seedlings compared with the use of smaller ones. A significant increase, of about 14% was observed in the average length of seedlings and about 16% in the average number of leaves produced in the large containers as compared with seedlings produced in smaller ones. Also the fresh wet weight, whether for the plant or its separate parts was significantly higher in seedlings produced in the large containers. The plant fresh wet weight in the large container was 26.98 g vs., 2.27 g in the smaller ones.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا