بررسی ویژگی‌های خاک و عوامل فیزیوگرافی مؤثر در استقرار گونۀ لاتی (Taverniera spartea (Burnm. f.) DC.) در استان هرمزگان

نویسندگان

1 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان هرمزگان سازمان تات

2 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مرکزی سازمان تات

‎10.22052/deej.2021.10.33.49

چکیده

گیاه لاتی (Taverniera spartea) از گونه‌های مهم مراتع خلیج و عمانی ایران به شمار می‌رود. در این پژوهش با استفاده از مدل افزایش تعمیم‌‌یافته، الگوی پاسخ گونۀ لاتی به شیب عوامل خاکی و توپوگرافیکی در رویشگاه‌های آن در استان هرمزگان مشخص شد. نتایج نشان داد که بافت خاک در هر سه رویشگاه مورد مطالعه، سندی لوم (شن 12 درصد، سیلت 21 درصد و رس 67 درصد) بود. میزان هدایت الکتریکی در سه رویشگاه تفاوت معنی‌داری نشان داد (۷/۱ تا ۵/۷ دسی‌زیمنس بر متر). اسیدیتۀ خاک نیز در سه رویشگاه تفاوت معنی‌داری نشان داد و در منطقۀ بشاگرد با میزان 1/8 بیشتر از دو منطقۀ دیگر بود. بیشترین مقدار آهک خاک در منطقۀ سیاهو و کمترین آن منطقۀ بشاگرد بود (۳/۱۹ تا ۳/۵۴ درصد). به‌کارگیری مدل جمعی تعمیم‌‌یافته برای هریک از متغیرهای محیطی، نشان داد که متغیرهای درصد آهک خاک، درصد رس، اسیدیته، درصد کربن آلی خاک، ازت خاک و درصد خاک لخت بر عملکرد گونه، معنی‌‌دار هستند. افزایش درصد رس خاک از مدل کاهشی، افزایش اسیدیتۀ خاک، از حالت دو مد، افزایش مقدار آهک خاک و همچنین مقدار درصد خاک بدون پوشش، از مدل زنگوله‌ای، افزایش درصد کربن آلی و ازت خاک هر دو از مدل افزایشی پیروی کرد. با توجه به نیازهای بوم‌شناختی اشاره‌شده، می‌توان نسبت به احیای مراتع تخریب‌شده، از طریق بوته‌کاری و بذرکاری با این گونه، به‌کمک سامانه‌های ذخیرۀ نزولات اقدام کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating Soil Characteristics and Physiographic Factors Affecting the Establishment of Taverniera spartea (Burnm. f.) DC. in Hormozgan province

نویسندگان [English]

  • Abdolhamid Hajebi 1
  • Hamidreza Mirdavoodi 2
  • Mohammadamin Soltanipoor 1
1
2
چکیده [English]

Introduction: Considering the extensive degradation of Iranian rangelands and forests due to livestock grazing and the land use change in recent decades, rangeland management requires a comprehensive knowledge concerning the ecological characteristics of native plant species and how they respond to environmental factors.
Developed from the Fabaceae legume family, Taverniera spartea is an important species indigenous to the Persian Gulf and Omani rangelands of Iran. As a rich source of plant protein, this plant has a high value in feeding animals. Possessing a strong root system, the plant plays an important role in biologically stabilizing nitrogen, increasing soil's organic matter, improving soil texture, and preventing soil erosion. Lack of sufficient knowledge concerning this plant species and the relationship between soil, environmental factors, and the vegetation status is a serious obstacle to using soil for biological regeneration of degraded rangelands and planning for optimal management of existing habitats. Therefore, this study sought to investigate the response pattern of the plant to the slope of soil and topographic factors in its habitats in Hormozgan province using the generalized incremental model.

Materials and Methods: This study was conducted in Siahoo, Ahmadi, and Bashagard regions in Hormozgan province. Siahoo region is located 55 km north of Bandar Abbas at an altitude of 450 meters above sea level, Ahmadi region is located 95 km north of Bandar Abbas at an altitude of 750 meters above sea level, and Bashagard region is located 135 kilometers east of Bandar Abbas at an altitude of 600 meters above sea level. The average rainfall of Siahoo, Ahmadi, and Bashagard region is 171.54, 183.61, and 193.18 mm, respectively, and their average annual temperatures are 27.34, 25.52, and 28.6 degrees Celsius respectively. Located among the semi-humid hot regions, Siahoo region is a semi-dry hot region with the average minimum and maximum absolute temperature of 21.8 and 32.3 ° C, respectively. Moreover, Bashagard is a hot dry region with the average minimum and maximum absolute temperature of 21.1 and 33.9 degrees Celsius, respectively.
A 30 plots were chosen via random-systematic sampling for each ecological unit (90 plots in three study areas). Then, the percentage of canopy cover was measured for each species located inside the plots, and a soil sample was taken from each plot for analysis. Moreover, conventional comparative analysis method was used as a nonlinear method to investigate the relationship between effective and significant environmental variables and vegetation, and forward selection was used to reduce error. On the other hand, the significance of the relationship between species composition and axes obtained from environmental variables was investigated using the Monte Carlo permutation test. Furthermore, a generalized incremental model was used to predict the response of plant species to changes in environmental factors. Finally, the Akaic information criterion was used to rank the variables affecting the performance of the species.
Results: This study found that the soil texture was sandy loam in all three habitats. The amount of electrical conductivity in the three habitats revealed a significant difference. Soil acidity was also higher in Bashagard region than the other two ones. The highest amount of soil lime was found in Siahoo region with 54.3%, and the lowest one was observed in Ahmadi region with 19.3%. It was also found that as the soil clay percentage increased, the species response was decreased and the species presence was reduced. On the other hand, with an increase in soil acidity to 7.5%, the species response increased, and as soil acidity was increased to 7.7%, the presence of the species decreased. Also, the presence and growth of the species increased with and increase in soil acidity.
The results also indicated that the presence and growth of species increased with an increase in the amount of soil lime to 55, and that the presence of the species decreased with an increase in soil lime. Moreover, as the percentage of the soil's organic carbon increased, the species response and presence increased. Furthermore, the species response and presence increased with an increase in the soil's nitrogen percentage. Also, as the percentage of uncovered soil (bare soil) increased to 55, the species response increased, and as the bare soil increased, the presence of the species decreased.

Discussion and Conclusion: The results of conventional adaptive classification showed that seven factors, including the percentage of neutralizing material, altitude, percentage of bare soil, electrical conductivity, soil saturation, litter percentage, and soil silt percentage were the main factors which influenced the distribution of Taverniera spartea. Applying the generalized collective model with Poisson error distribution for each environmental variable showed that soil lime percentage, clay percentage, acidity, soil organic carbon content, soil nitrogen, and bare soil percentage has a significant influence at the level of 0.05%. on the species yield.
The study also examined the role of the presence and yield of Taverniera spartea as a valuable rangeland species in forage production, soil and water conservation using environmental factors. It could be said that to rehabilitate the degraded rangeland areas with the required conditions for the establishment of this Taverniera spartea, the species should be planted according to its ecological needs. At the same time, proper and optimal use of the species in rangeland and suitable habitats reduces the loss of capital and time.

کلیدواژه‌ها [English]

  • Physiography
  • Soil
  • Taverniera spartea
  • Hormozgan Province
  1. Ahmadi, K., Alavi, S. J. and Tabari, M., 2015. Evaluation of production capacity of Fagus orientalis using generalized collective model. Iranian Forest Magazine, 7 (1): 17-32.
  2. Akaike, H., 1974. A new look at the statistical model identification, Automatic Control, IEEE Transactions on, 19(6): 716-723.
  3. Alavi, S. J., Nouri, Z. and Zahedi Amiry, Gh., 2017. Beech reaction curve to environmental variables using a generalized collective model in Khairid forest, Nowshahr. Journal of Wood and Forest Science and Technology Research, 24 (1): 29-42.
  4. Ali Ehyaei, M and Behbahanizadeh, A. A., 1993. Description of methods of chemical decomposition of soil. Technical Journal No. 893, Soil and Water Research Institute, 129 pages.
  5. Arzani, H. and Abedi, M., 2015. Rangeland Assessment, Vegetation Measurement, Volume II. University of Tehran Press, 305 p.
  6. Assadpour, R., Zakeri, O., Darvishkhah, M. and Ghoreishi, M., 2018. The final report of Autoeccology of Taverniera cuneifolia in Hormozgan province. Forest and Rangelands research Institue, 97 p.
  7. Bakkenes, M., Alkemade, J.R.M., Ihle, F., Leemans, R. and Latour, J.B., 2002. Assessing the effects of forecasted climate change on the diversity and distribution of European higher plants for 2050. Global Change Biology, 8, 390–407.
  8. Faraji, A., 2014. Reaction of Artemisia sieberi communities to some environmental changes in Markazi province. Isfahan University of Technology, Faculty of Natural Resources, Master Thesis in Range Management, 102 pages.
  9. Godefroid, S., Koedam, N., 2004. Interspecific variation in Soil compaction sensitivity among forest floor species. Biological Conservation. 119: 207- 217.
  10. Hajebi, A. H., Mirdavoodi, H. R., Soltanipoor, M. A. and Moslehi, M., 2020. Ecological needs of Platychaete aucheri in Hormozgan province. Forest and Rangelands research Institue, 52 p.
  11. Heidari, F., Dianati, Gh. and Alavi, S. J., 2017. Comparison of response curves of Bromus tomentellus and Achillea millefolium to environmental gradients using a generalized collective model. Journal of Plant Ecosystem Conservation, 5 (11): 34-17.
  12. Khalighi, F., Jeddi, M., Ahvazi, M., Shahnazi, S., Biat, A., Mohager, N. and Zare, S., 2013. Evaluation of cytotoxic effect of Taverniera spartea and Tephrosia persica Boiss. on human cancer cell lines. Journal of Medicinal Plants, 1: 128-114.
  13. Leps, J. and Smilauer, P., 2003. Multivariate Analysis of Ecological Data using CANOCO. Cambridge University Press.269 pp.
  14. Mirdavoodi, H. R., 2013. The effect of turbulence on plant diversity and invasive species in oak groves in western Iran (Case study: Dalab Ilam forest). PhD Thesis, University of Tehran, Department of Forestry and Forest Economics, 128 pages.
  15. Mirdavoodi, H. R., 2016. Identification of research project to study the ecological needs of some important Iranian rangeland species. Forest and Rangelands research Institue, 75 p.
  16. Palmer, M. W., 1993. Putting things in even better order: The advantages of canonical correspondence analysis. Ecology 74: 2215- 2230.
  17. Rechinger, K. H., 1984. Flora Iranica. Academische Druk-u. Verlagsanstalt. Graz.
  18. Soltanipoor, M. A., Mirdavoodi, H. R. and Assadpour, R., 2020. Ecological needs of Taverniera spartea (Burnm. f.) DC. in Hormozgan province. Forest and Rangelands research Institue, 52 p.
  19. Ter Braak, C. J. F., 1987. The analysis of vegetation-environment relationships by canonical correspondence analysis. Vegetatio, 69: 69-77.
  20. Traoré, S., Zerbo, L., Schmidt, M. and Thiombiano, L., 2012. Acacia communities and species responses to soil and climate gradients in the Sudano-Sahelian zone of West Africa. Journal of Arid Environments, 87:144-152.

Yee, T.W. and Mitchell, N.D. 1991. Generalized additive models in plant ecology. Vegetation Science, 2(5): 587-602