ABSTRACT
The growth of Albizia lebbeck [L.] Benth, and Leucaena leucocephala [Lam] de-Wit, were studied in soils collected from Karachi University area under natural ecological circumstances. Various growth variables of A. lebbeck and L. leucocephala were reduced from different soil composition [25, 50 and 75%] of Karachi University soil [sandy soil] as compared to Garden soil. Growth of L. leucocephala in comparison of A. lebbeck was significantly decreased in all of the proportions of University soil. 50% University soil caused diminution in a large number of growth parameters of A. lebbeck, particularly considerable inhibition was observed in plant height, plant cover, seedling length, root length, shoot length, leaf area, shoot dry weight and total plant dry weights than Garden soil. 75% soil markedly retarded leaves growth and leaflets numbers, whereas root and leaf dry weights were substantially lessened by 50 and 75% soils. Root/shoot ratio and leaf weight ratio were manifestly stunted in the treatment of 25% soil. In the case of L. leucocephala, almost cumulative growth properties except shoot dry weight were depleted using all ratios of University soil comparatively to Garden soil. 75% University soil especially showed more pronounced declination in plant height, plant cover, numbers of leaves and leaflets, leaf area, root, leaf and total plant dry weights, root/shoot, leaf weight and leaf area ratios of L. leucocephala as related to Garden soil. 25% soil exhibited appreciably regretting growth in root, shoot and seedling length while, specific leaf area was adversely affected from application of 50% soil
Subject(s)
Soil , Gardening , UniversitiesABSTRACT
The growth of Peltophorum pterocarpum [DC.] Baker ex K. Heyne were studied in soils collected from Khan Towel, Tanveer Garment, One Tech Rubber and One Tech Ply Board factories in the vicinity of Korangi and Landhi industrial areas under natural environmental conditions. Various growth variables of P. pterocarpum were reduced from industrial areas soils particularly of One Tech Rubber factory soil exhibited decrease in many plant growth parameters than a control soil of Karachi University Campus. Reduction was pronounced in plant height, leaves numbers, plant cover, leaflets numbers, leaf area and dry weights of root, shoot, leaf and total plant in One Tech Rubber factory soil as compared to University soil. Tanveer Garment factory soil inhibited apparently shoot, seedling length, specific leaf area and leaf area ratio while root length and root/shoot ratio was retarded by One Tech Ply Board factory soil. Khan Towel factory soil stunted the root/shoot ratio of P. pterocarpum as correlated to University soil