Composting Acidified Wood Industry Wastes in a Sandy Calcareous Soil I.Conditioning Effect, Water Economy and Fertilizers use Efficiency by 5 Years Old VineGrapes.

摘要

successive years (2008 and 2009) completely randomized drip irrigated field experiment with four replications for each treatment was conducted at El-Saff area, Giza governorate, Egypt, to study the effect of composting acidified wood industry wastes (WIW) in a sandy calcareous soil using different diluted acids on soil properties, growth response, nutrients uptake and both water and fertilizers use efficiencies by 5 years old Thompson seedless vine grapes (Vitis Spp). During winter management practices, soils were treated with 10kg WIW/ plant hill saturated with water or 0.5, 1.0, and 2.0 M. of each of commercial HNO3, H3PO4, and mixture of both (1:1). Noteworthy that each kg of WIW was dipped in 3 L of the diluted acid and left for two days before incorporating into the soil. Incorporating acidified WIW in the soil improved: a) the hydrophysical properties that include soil structure, porosity and pore size distribution, moisture retention and available water, movement of water in the soil, b) the biochemical properties that include soil pH, CEC and surface area, organic matter content and organic nitrogen%, C:N ratio, available nutrients in the soil and total contents of bacteria and fungi, c) plant growth, nutrients uptake, obtained yield and both water and fertilizers use efficiencies by the plants. The improving effect increases by the concentration of the used acid. It is preferable to use the medium concentration of the mixture of HNO3 and H3PO4 i.e 1 M. The increase in plant growth, yield and the improvement in soil properties doesn’t coincide with higher concentration.