جستجوی مقالات مرتبط با کلیدواژه "jatropha curcas" در نشریات گروه "زراعت"

Decomposition is a biological process through which nutrients are released for plant use. The physic nut ( Jatropha curcas Linn.),is a potential tropical plant that can be grown to improve the environment and enhance the quality of rural life. Since, knowledge about the decomposition of Jatropha curcas litter is not fully documented in Sudan, the objective of this study is to evaluate decomposition and factors affecting it. A completely randomized block design field experiment was conducted at El - Rawakeeb Research Farm. The study area was divided into three study sites according t o plant spacing.These sites were: A: control barren site, B: planted site spaced at (2x270 m) and C: planted site spaced at (1x3m). Eight gram air dried Jatropha curcas litter was weighed into 0.1 x 1.5 m nylon litter decomposition bags of 2 mm mesh s ize. Litter bags were buried at 20 cm soil depth in the three sites. Random samples of these bags along with their soil contents were periodically retrieved monthly and for four months for analyses. Results obtained indicated significant variations in lit ter decomposition between the three study sites. Significant differences in soil temperature and pH values and insignificant variations in humidity, Ca, Mg and silt contents. Sat, Na and SAR, between the three study sites, (P≤0.05) were noticed. Signifi cant differences in population density of the extracted decomposers fauna (i.e.Collembola, termites and mites) were obtained. (P≤0.05). These results emphasize that decomposition of Jatropha curcas litter is affected by plant spacing, site characteristics and population density of decomposers.