Comparison of Distance’s Indicators and Quadrate’s Indicators in Determination of Dispersion Pattern of Fritillaria imperialis L. Ilam
محورهای موضوعی : مجله گیاهان زینتیFatemeh Bidarnamani 1 , Mehdi Shabanipour 2
1 - Institute of Agricultural Research, University of Zabol
2 - Ph.D Student in Entomology, Islamic Azad University of Arak
کلید واژه: Clumped, Crown imperial, Hopkins, Morisita, Taylor,
چکیده مقاله :
Crown imperial scattered according to soil structure and organic matter in Zagros regions in Ilam. This plant has been performed an important role in the beautification of environment, tourist attraction and providing of plant essential oils which are used for the production of medicines. The current research was carried out to evaluation spatial distribution pattern of Fritillaria imperialis in Ilam (Manesht and Ghalarang regions) and comparing distance and quadrate method in 2014. Sampling program was random-systematic just four transects with 100 meters length within the extent of 4300 hectare. Distances method are including t2, Hopkins, Holgate, Johnson and Zimmer and Pielou; and quadrates method are including Taylor, Iwao, Morisita, K and CV, were used to determination spatial distribution pattern of crown imperial. Results showed that quadrate method (Morisita and CV) and distance method (Holgate and Peilou) evaluated spatial distribution pattern of crown imperial are random pattern. But the results quadrate method (Taylor, Iwao and K) and distance method (Hopkins, t2 and Johnson and Zimmer) evaluated a clumped pattern for this species in the study area. The results of analysis had been showed that the distance method more accuracy than quadrate method. Also, t2 and Hopkins indexes were the best distance method to identify pattern. Iwao and K indexes was the best one between quadrate method. Overall research results had been showed that indexes (Iwao, K, t2 and Hopkins) highest accuracy and indexes (CV, Morisita, Holgate and Pielou) had the least accuracy.
لاله واژگون در نواحی مختلف رشته کوه زاگرس بویژه ایلام بر اساس بافت خاک و مواد آلی خاک پراکنده شده است. این گیاه نقش مهمی در زیبایی محیط، جذب توریست و تهیه اسانس‌های مؤثر گیاهی برای محصولات دارویی دارد. مطالعه حاضر، به‌منظور ارزیابی الگوی پراکنش فضایی لاله واژگون در ایلام(مناطق مانشت و قلارنگ)و مقایسه شاخص‌های پراکنش انجام شد. برنامه نمونه-برداری به روش تصادفی-سیستماتیک در ناحیه‌ای به‌وسعت 4300 هکتاری در امتداد 4 ترانسکت 100 متری انجام شد. شاخص‌های فاصله‌ای شامل( 2t، هاپکینز، هولگیت، جانسون- زیمر و پیلو) و شاخص‌های کوادراتی شامل (تیلور، ایواوو، موریسیتا، K و CV) برای تعیین الگوی پراکنش گونه لاله واژگون استفاده شد. نتایج نشان داد که شاخص‌های کوادراتی(موریسیتا و CV) و شاخص‌های فاصله‌ای(هولگیت و پیلو)، الگوی پراکنش لاله واژگون را تصادفی ارزیابی کردند. اما نتایح روش‌های کوادراتی(تیلور، ایوائو و K) و شاخص‌های فاصله‌ای(هاپکینز، t2 و جانسون-زیمر) الگوی پراکنش این گونه در ناحیه مورد مطالعه تجمعی ارزیابی شد. نتایح تجزیه و تحلیل داده‌ها نشان داد که شاخص‌های فاصله‌ای نسبت به شاخص‌های کوادراتی دقت بیشتری داشتند. بنابراین شاخص-های t2 و هاپکینز در بین شاخص‌های فاصله‌ای و شاخص‌های K و ایواوو در بین شاخص‌های کوادراتی بهتر نشان داده شد. نتایج کلی این تحقیق نشان داد که شاخص‌های (ایواوو، K، t2 و هاپکینز)بیشترین دقت و شاخص‌های(CV، موریسیتا، هولگیت و پیلو) کمترین دقت دارد.
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