M. B. Tandel , M. U. Kukadia , B. N. Kolambe , D. B. Jadeja

Abstract

An experiment on the influence of tree cover on physical properties of soil was carried out at Instructional Farm, ASPEE College of Horticulture and Forestry, Navsari (Gujarat) under twelve-years old plantation during the year 2002-2003. The experiment was laid out in FCRD with eleven treatments viz., Arjun (Terminalia arjuna), Hed (Adina cordifolia), Teak (Tectona grandis), Sharu (Casuarina equisetifolia), Eucalyptus (Eucalyptus tereticornis), Sissoo (Dalbergia sissoo), Bamboo (Dendrocalamus strictus), Biyo (Pterocarpus marsupium), Killai (Albizia procera), Khair (Acacia catechu) and control (open field) with three replications. The soil samples were collected from three depths (0-30, 30-60 and 60-90 cm). Maximum improvement in physical characteristics of soil viz., particle density, bulk density, porosity, and water holding capacity were recorded under D. sissoo plantation and observed in upper layer (0-30 cm) of soil.

Keywords

Tree Cover, Influence, Soil Properties, Particle Density, Bulk Density, Water
Holding Capacity, Porosity

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K. B. Maheta , M. U. Kukadia , B. G. Vashi , D. B. Jadeja

Abstract

The present investigation was carried out with its prime objective to study the effect of forest tree species on the yield potential of inter crops during the year 1994-95. Grain yield of agricultural crops (intercrops) grown in association with trees decreased compared to sole crops. The reductions in yields under Casuarina were more than Adina cordifolia and Gmelina arborea. Maumum light intensity was recorded under open field (control) wbile it was found to he minimum with Casuarina.

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Shailendra Bhalawe , M. U. Kukadia , Dileswar Nayak

Abstract

The investigation undertaken to find out the rate of decomposition of leaf litter of seven multi-purpose tree species, viz., Tectona grandis, Eucalyptus tereticornis, Dendrocalamus strictus, Terminalia bellirica, Cassia fistula, Casuarina equisetifolia and Terminalia arjuna for 195 days i.e. from first fortnight of July 2009 to second fortnight of January 2010. The litter bag of nylon net (1mm mesh size), 20x20 cm. in size, containing 10g air-dried samples were incubated on surface in the first week of July 2009. Litter bags of each species were placed on the plantation field of respective species. For each species 3 litter bags were recovered at fortnight intervals for the study of weight loss in dry matter due to decomposition. Fresh leaf litter were also chemically analysed for N, P, and K using standard prescribed procedure. Significantly the highest amount of nitrogen release (%) was recorded in Eucalyptus tereticornis which was followed by Dendrocalamus strictus. Among different multipurpose tree species the maximum amount of phosphorus release was recorded in Cassia fistula and maximum amount of potassium release percentage was in Eucalyptus tereticornis which was at par with Terminalia bellirica.

Keywords

Decomposition, Multipurpose Tree Species, Nutrient Release, Weight-loss.

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M. B. Tandel ¹, M. U. Kukadia ¹, M. R. Parmar ¹, N. K. Patel ¹

Affiliations
1 Department of Silviculture and Agroforestry, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari-396 450, IN

Abstract

Molecular variations among different accessions 15 Jatropha curcas accessions were carried out. The RAPD analysis of accessions showed that the five decamer primers produced a total of 27 scorable bands. Out of them 18 were polymorphic and 9 were monomorphic. The percentage of polymorphism ranged from maximum 77.78 % showed by OPF-08 to a minimum of 60.00 % by OPF-3, OPF-5 and OPF-10. Lowest genetic similarity (0.333) was observed between accessions No. 9 and 1 and 9 and 3 and the highest genetic similarity (1.000) was among various accessions including 2, 4, 5, 6, 7, 10, 11, 12, 13, 14 and 15. The dendrogram of fifteen accessions reflected that at a similarity level of 70.00 %, the accessions were divided in two clusters. The accession No. 9 was found in second cluster having minimum similarity within other accessions whereas rests of accessions were laid in first cluster.

Keywords

RAPD, Accessions, Jatropha curcas L.

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