Different Growth Characteristics of Grewia mollis, Grewia tenax and Grewia villosa Under Nursery and Field Conditions

作     者：Niemat Abdalla Saleem Khalil Ayoub Adam Mohamed Mohamed El Nour 

作者机构：Department of Forestry University of Bahri Khartoum 11111 Sudan Department of Silviculture University of Khartoum Khartoum 13314 Sudan 

出 版 物：《Journal of Life Sciences》 (生命科学（英文版）)

年 卷 期：2012年第6卷第9期

页      码：1016-1024页

摘      要：This study was carried out to assess the growth characteristics of Grewia moll＆, Grewia tenax and Grewia villosa under the nursery and field conditions. Two experiments were conducted at the farm of the College of Natural Resources and Environmental Studies, University of Juba, Khartoum, Sudan. Randomized complete block design with three replications was used. Morphological and physiological factors were measured. Seedlings height, number of leaves, number of branches and sub-branches were different （P 〈 0.05） among the three species at the nursery stage and under field conditions. Collar diameter showed significant difference among the species under field conditions. Physiological factors exhibited more significant variations in the field than at the nursery stage. Variations in growth characteristics were attributed to genetics differences and different growth habit, while variations in physiological factors （photosynthesis and transpiration rate） were attributed to differences in leaf structure, size and number of stomatal pores.

主 题 词：The nursery and field conditions Grewia mollis Grewia tenax Grewia villosa growth characteristics 

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