Root Morphology Of Six Tree Species In Arid Sandy Mountain Area Of Shandong Province

As the important function of plant organs,The root has the branch of fine root and root. The shape and structure of fine root determines the function including Moisture absorption, nutrient cycling, carbon distribution and the soil-fixation, and so on. However, morphological structure characteristics of coarse roots determined its main exercise of nutrient and moisture transportation and storage, and so on. Dry barren tree growth in habitat is the basis of the root, at the same time for soil retaining tree roots is the key to the prevention and control of soil and water loss. Therefore, dry barren habitat in the growth of tree roots characteristics can not only reflect the tree’s ability to adapt to adversity, but also reflects the survival strategy of species. In order to clarify the adaptability of different tree species to drought or poor habitat, which provide a scientific basis for drought and poor mountain afforestation tree species selection, this study used 6 common afforestation tree species as the object. Complete root systems were obtained through the whole root mining method, comparison analysis of its coarse root and fine root morphological structure characteristics, the results show that: 1. 6 tree species had different strategy to arid environments in primary stage of silviculture.The roots of R. pseudoacacia and G. sinensis had significant vertical distribution, whichindicated that they would exploit water and nutrient in vertical profile of soil. However,the roots of A. icosals expanded in every horizontal direction, which indicated that theyexploit living resources mainly on horizontal directions. The fine roots of Z. Bungeanumand J. regia were stronger than D. kaki, which indicated that they exploit soil resourcesthrough vigorous fine roots. 2. It was significantly different among 6 tree species in arid barren environment. The loworder fine roots of G. sinensis were more than those of R. pseudoacacia and A. icosals, butits fine root length, surface area and root specific length were lower than those of G.sinensis, which indicated that the absorptive function for water and nutrient of R.pseudoacacia and A. icosals was better than that of G. sinensis and they had muchstronger adaptive ability for arid environment. the The root specific length of low orderfine roots of J. regia was significantly larger than that of D. kaki and Z. Bungeanum,which indicated more better adsorptive function for water and nutrient.