الگوهای پراکنش فضایی ریشه‌ها و رقابت در گیاهان گون و کلاه‌میرحسن در مراتع شانجان شبستر با استفاده از نرم‌افزار پایتون
محورهای موضوعی : تنوع زیستیمیثم علیزاده 1 , قاسم حبیبی 2 *
1 - دانش‌آموخته گروه کشاورزی، واحد شبستر، دانشگاه آزاد اسلامي، شبستر، ایران.
2 - دانشیار گروه کشاورزی، واحد شبستر، دانشگاه آزاد اسلامي، شبستر، ایران. *رایانامه نویسنده مسئول مکاتبات: habibibibalani@iau.ac.ir
کلید واژه: پراکنش فضایی ریشه‌ها, رقابت ریشه‌ها, گون, کلاه‌میرحسن, نرم‌افزار پایتون,
چکیده مقاله :
این تحقیق به بررسی تأثیر رقابت ریشه‌ها و الگوهای توزیع فضایی آنها در دو گونه گیاهی گون و کلاه‌میرحسن در مراتع شانجان شبستر پرداخته است. هدف اصلی مطالعه، شناسایی تأثیرات رقابتی و سازگاری‌های ریشه‌ها در لایه‌های مختلف خاک و تحلیل روابط آنها با ویژگی‌های فیزیکی خاک است. نتایج نشان داد که تعداد ریشه‌ها در هر دو گونه با افزایش عمق خاک کاهش می‌یابد و این کاهش در عمق‌های 40-30 سانتی‌متری و 50-40 سانتی‌متری مشهود است. در گونه گون، بیشترین تعداد ریشه‌ها در لایه‌های سطحی خاک (0-10 سانتی‌متر) مشاهده شد، در حالی که در گونه کلاه‌میرحسن نیز روند مشابهی وجود داشت، اما با کاهش بیشتری در عمق‌های پایین‌تر. در مورد قطر ریشه‌ها، در گونه گون با افزایش عمق خاک، قطر ریشه‌ها افزایش پیدا کرد و بیشترین قطر در عمق 50-40 سانتی‌متری ثبت شد، در حالی که در گونه کلاه‌میرحسن، قطر ریشه‌ها در عمق‌های میانه خاک (10-30 سانتی‌متر) بیشتر بود. همچنین، رقابت ریشه‌ها در گونه کلاه‌میرحسن شدیدتر از گونه گون بود، به‌ویژه در عمق‌های سطحی‌تر. تحلیل رقابت ریشه‌ها با استفاده از تابع همبستگی نشان‌دار (MCF) نشان داد که در عمق‌های عمیق‌تر، پراکنش ریشه‌ها به سمت گسترش بیشتر و کاهش رقابت تمایل پیدا می‌کند. این نتایج می‌تواند در مدیریت مراتع و حفظ پوشش گیاهی، به‌ویژه در مناطق خشک و نیمه‌خشک، مؤثر باشد. همچنین، این تحقیق به‌عنوان مبنای تحقیقاتی برای مطالعات آینده در زمینه رقابت ریشه‌ها و الگوهای توزیع فضایی در دیگر گیاهان و اکوسیستم‌ها کاربرد دارد.
Root competition plays a significant role as a key factor in determining plant distribution patterns and their adaptation in rangeland ecosystems. This research aimed to investigate the effect of root competition and the spatial distribution pattern of roots of two species, Astragalus sp. and Acantholimon sp., in the Shanjan Shabestar rangelands. The main objective of this study was to analyze the root distribution in different soil layers and the effect of soil physical properties on their competition. Sampling was conducted at five different depths (0-10, 10-20, 20-30, 30-40, and 40-50 cm), and root characteristics, including the number and diameter of roots, were measured. Root competition was analyzed using the Marked Correlation Function (MCF) and the extraction of the competition index. Soil physical properties, including texture, moisture, and organic matter, were also measured. The results showed that the number of roots in both species decreased with increasing depth, especially in the 30-50 cm depths, where a decrease of more than 88% in Astragalus sp. and 81.67% in Acantholimon sp. was observed. In Astragalus sp., the highest root density was recorded in the surface layer (0-10 cm) with an average of 50 roots per unit area, while in Acantholimon sp., this value was 60. The root distribution in Astragalus sp. showed a uniform decreasing trend, but in Acantholimon sp., a sharper decrease was observed in the lower depths. The root diameter in Astragalus sp. increased with depth and reached its maximum value (1.21 mm) at the 40-50 cm depth, while in Acantholimon sp., the highest average root diameter was observed at the 0-10 cm depth (0.83 mm) and then decreased. Competition analysis showed that Acantholimon sp. had stronger root competition than Astragalus sp., especially in the surface layers where the competition index was higher. At lower depths, due to the decrease in root density and greater access to resources, the intensity of competition decreased. Furthermore, the results showed that soil texture and moisture had a significant effect on root distribution and competition intensity. In soils with heavier texture and higher moisture, root density and competition intensity increased. These findings suggest that different species adopt different root growth strategies in response to competition and resource availability in soil layers. The results of this research can be used in rangeland management, improving vegetation restoration strategies, and increasing the productivity of rangeland ecosystems, especially in arid and semi-arid regions.
کریمی‌نژاد، ن.، عرفانی‌فرد، س.، فلاح‌شمسی، س. و صادقی، ح. (۱۳۹۶) تحلیل اثر پراکنش مکانی کپه‌ای درختان بنه (Pistacia atlantica Desf) بر ویژگی‌های زیست‌سنجی آنها با استفاده از تابع همبستگی نشان‌دار در جنگل تحقیقاتی بنه استان فارس. تحقیقات جنگل و صنوبر ایران, 25(2): 264-274. قابل دسترس در: https://doi.org/10.22092/ijfpr.2017.111761/
Abdi, E., Majnounian, B., Rahimi, H. and Zobeiri, M. (2009) Distribution and tensile strength of Hornbeam (Carpinus betulus) roots growing on slopes of Caspian Forests, Iran. Journal of Forestry Research, 20(2): 105-110. Retrived from https://doi.org/10.1007/s11676-009-0019-x/
Abdi, E., Majnounian, B., Rahimi, H., Zobeiri, M., Mashayekhi, Z. and Yosefzadeh, H. (2010) A comparison of root distribution of three hardwood species grown on a hillside in the Caspian forest, Iran. Journal of Forest Research, 15(2): 99-107. Retrieved from https://doi.org/10.1007/s10310-009-0164-2/
Akhavan, R., Parhizkar, P., Amanzadeh, B. and Mohammadnezhad Kiasari, S. (2017) Intra-specific competition of beech using Mark Correlation Function (MCF) in the Hyrcanian forests of Iran. Forest and Wood Products, 70(4): 637-648. Retrieved from https://doi.org/10.22059/jfwp.2018.231550.841/
Akhavan, R. and Rostamikia, Y. (2020) Inter-specific competition of juniper trees in Kandiragh forest reserve using O-ring statistic and mark correlation function. Forest and Wood Products, 73(2): 189-200. Retrieved from https://doi.org/10.22059/jfwp.2020.295907.1066/
Asadi, R., Hassan Pour, F., Mehrabani, M., Baghizadeh, A. and Karandish, F. (2018). Investigation the effect of deficit irrigation on root distribution and vegetative growth of Rosmarinus Officinalis L. Water and Irrigation Management, 8(2): 289-301. Retrieved from https://doi.org/10.22059/jwim.2019.271640.650/
Bachofen, C., Tumber-Dávila, S.J., Mackay, D.S., McDowell, N.G., Carminati, A., Klein, T., Stocker, B.D., Mencuccini, M. and Grossiord, C. (2024) Tree water uptake patterns across the globe. New Phytologist, 242(5): 1891-1910. Retrived from https://doi.org/https://doi.org/10.1111/nph.19762/
Carvalho, J.I., Carayugan, M.B., Tran, L.T., Hernandez, J.O., Youn, W.B., An, J.Y. and Park, B.B. (2024) Variation in Root Biomass and Distribution Based on the Topography, Soil Properties, and Tree Influence Index: The Case of Mt. Duryun in Republic of Korea. Plants, 13(10): 134- 141.
Casper, B.B. and Jackson, R.B. (1997) Plant competition underground. Annual Review of Ecology and Systematics, 28: 545–570. Retrieved from https://doi.org/10.1146/annurev.ecolsys.28.1.545/
Davoudi, M.H. and Fatemi Aqda, M. (2009) Effect of diameter and density of willow roots on shear resistance of soils. Scientific Quarterly Journal of Geosciences, 18(71): 143-148. Retrieved from https://doi.org/10.22071/gsj.2010.57003/
Fan, J., McConkey, B., Wang, H. and Janzen, H. (2016) Root distribution by depth for temperate agricultural crops. Field Crops Research, 189: 68-74. Retrevied from https://doi.org/https://doi.org/10.1016/j.fcr.2016.02.013/
Grant, J., Bach, L.H. and Green, S.R. (2010) Root distribution and water uptake in young poplar trees in New Zealand soils. New Zealand Journal of Forestry Science, 40(1): 49–63.
Gning, F., Jourdan, C., Marone, D., Ngom, D. and Ræbild, A. (2023) Root distribution of Adansonia digitata, Faidherbia albida and Borassus akeassii along a climate gradient in Senegal. Agroforestry Systems, 97(4): 605-615. Retrived from https://doi.org/10.1007/s10457-023-00813-7/
Jackson, R.B., Canadell, J., Ehleringer, J.R., Mooney, H.A., Sala, O.E. and Schulze, E.D. (1996) A global analysis of root distributions for terrestrial biomes. Oecologia, 108(3): 389-411. Retrived from https://doi.org/10.1007/BF00333714/
Jin, H., Fan, C., Zhu, H., Zhang, Y., Xiao, R. and Yang, Z. (2024) Responses of plant biomass allocation to changed precipitation timing in a semi-arid steppe. Plant and Soil, 510(1): 395-406. Reterived from https://doi.org/10.1007/s11104-024-06928-9/
Li, P.-F., Ma, B.-L., Wei, X.-F., Guo, S. and Ma, Y.-Q. (2024) Deeper root distribution and optimized root anatomy help improve dryland wheat yield and water use efficiency under low water conditions. Plant and Soil, 501(1): 437-454. Retrevied from https://doi.org/10.1007/s11104-024-06526-9/
Loo, E.P.I., Durán, P., Pang, T.Y., Westhoff, P., Deng, C., Durán, C., Lercher, M., Garrido-Oter, R. and Frommer, W.B. (2024) Sugar transporters spatially organize microbiota colonization along the longitudinal root axis of Arabidopsis. Cell Host & Microbe, 32(4): 543-556.e546. Reterived from https://doi.org/10.1016/j.chom.2024.02.014/
Manoli, G., Bonetti, S., Domec, J.-C., Putti, M., Katul, G. and Marani, M. (2014) Tree root systems competing for soil moisture in a 3D soil–plant model. Advances in Water Resources, 66: 32-42. Retrived from https://doi.org/https://doi.org/10.1016/j.advwatres.2014.01.006/
Montazeri, F., Tamartash, R., Tatian, M.R. and Hojati, M. (2018) Potential of rangeland species Astragalus globiflorus and Acantholimon hohenackeri in heavy metals absorption, Case study: rangelands around the Firoozkouh cement factory. Iranian Journal of Range and Desert Research, 25(2): 278-288. Retrived from https://doi.org/10.22092/ijrdr.2018.116840/
Muhandiram Karunarathne, C.L.S., Kikuta, M. and Nagaoka, T. (2024) Shoot and root responses to low phosphorus and their genotypic variability in selected cultivars of Japanese core collections of maize and soybean. Soil Science and Plant Nutrition, 70(2): 100-113. Retrived from https://doi.org/10.1080/00380768.2023.2283487/
Mulia, R. and Dupraz, C. (2006) Unusual fine root distributions of two deciduous tree species in southern France: What consequences for modelling of tree root dynamics? Plant and Soil, 281(1): 71-85. Retrived from https://doi.org/10.1007/s11104-005-3770-6/
Silva, J.S. and Rego, F.C. (2003) Root distribution of a Mediterranean shrubland in Portugal. Plant and Soil, 255(2): 529-540. Retrieved from http://www.jstor.org/stable/24123968/
Zhang, S., Chen, Y., Zhou, X. and Zhu, B. (2024a) Spatial patterns and drivers of ecosystem multifunctionality in China: Arid vs. humid regions. Science of The Total Environment, 920: 170868. Retrived from https://doi.org/https://doi.org/10.1016/j.scitotenv.2024.170868/
Zhang, W.-P., Surigaoge, S., Yang, H., Yu, R.-P., Wu, J.-P., Xing, Y., Chen, Y. and Li, L. (2024b) Diversified cropping systems with complementary root growth strategies improve crop adaptation to and remediation of hostile soils. Plant and Soil, 502(1): 7-30. Retrieved from https://doi.org/10.1007/s11104-023-06464-y/
Zhu, W., Zhao, D., Di, N., Li, D., Zhou, O., Sun, Y., Jia, L., Ding, C. and Xi, B. (2024) Matching root water uptake patterns to fine root and soil water distributions. Plant and Soil, 495(1): 499-516. Retrieved from https://doi.org/10.1007/s11104-023-06349-0/