Document Type : Research articles.
Authors
Soils, Water and Environ. Res. Institute, Agric. Res. Center, Giza, Egypt
Abstract
A field experiment was conducted at Ismailia Agric. Res. Station
during two successive seasons of 2006 and 2007 to evaluate possibility
of composted town refuse utilization at a rate of 15 m3/fed in
combination with different rates of mineral nitrogen (20, 30, 40 and 60
kg N/fed) and elemental sulphur (0, 100 and 200 kg S/fed) for
improving nutrients status of the sandy soil and its reflection on sesame
(Shandawil 3 c.v.) yield and seed quality. The obtained results showed
that all the applied treatments resulted in a pronounced improvement for
soil nutrients status, particularly in case of the combined treatments of
composted town refuse, mineral nitrogen and elemental sulphur. Also,
the beneficial effects were maximized with increasing the applied rates
of N and S, however, a significantly increased in soil available content
of N, P, K, S, Fe, Mn, Zn, and B was occurred over the control
treatment. The favourable conditions of the applied combined
treatments, especially with organic compost or sulphur, commonly
achieved by lowering soil pH and forming chelated organo-metalic
compounds. These chelated micronutrients represent the next superior
form due to a higher portion of these compounds still in maintained
active forms for uptake by plant roots.
The beneficial effects of the studied treatments were actually
reflected on increasing some plant parameters of the grown sesame
plants, i.e., number of seed/plant, weight of 1000 seed and oil
percentage. In addition, the positive effects of the studied treatments
were more attributed with improving the efficiency of macro and
micronutrients uptake according to their effective roles. Moreover, the
nutrient responses of N, P, K, S, Fe, Mn, Zn, and B to accumulate in
sesame seed tissues, were parallel closely to their corresponding
available contents in the treated soils. It is worthy to mention that the
beneficial effects of applied treatments on sesame yield and its
components were more pronounced in the second season as compared to
the first one, probably due to the residual effect of the applied
treatments.
Keywords
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