POTATO PRODUCTION BY ORGANIC FARMING 3 - EFFECT OF ORGANIC  ERTILIZER AND WHEY ON PLANT GROWTH, YIELD AND TUBERS QUALITY CHARACTERISTICS

H. Al - Sahaf, F.; S. Atee, Alaa

	POTATO PRODUCTION BY ORGANIC FARMING 3 - EFFECT OF ORGANIC ERTILIZER AND WHEY ON PLANT GROWTH, YIELD AND TUBERS QUALITY CHARACTERISTICS
The Iraqi Journal of Agricultural Science
Article 1, Volume 38, Issue 4, 2007, Pages 65-82
Authors
F. H. Al - Sahaf; Alaa S. Atee
Abstract
An experiment was carried out at the Vegetable Field of the College Agric, Abu - Ghraib, to study the effect of application of organic residues to the soil (poultry residues 0 , 10% of 20% , or cows residues) (WAV) and whey at concentrations 0 , 10% or 20% of irrigation water on growth , yield and tubers quality during the spring and autumn seasons (2006) . The design adopted was RCBD with three replicates. Results showed that application of organic residues 20% and 20% whey increased the number of stems, and the highest number of stems was 10.67 and 9.33, Plant when 20% of Poultry residues with 20% whey were used for both seasons, respectively. However, the best tuber's quality was found when 20% of cow or poultry residues with 10% of whey were used highest. The percentage of starch was 27.9% and 28.6% in spring season, while in fall season it was 30.8% and 31.7% for 20% of either residue source with 20% whey. Thus last treatment produced highest total yield (58.7and 66.0 ton. ka"1) and marketable yield (56.6 and 64.1 ton.ha"1) for spring season. Some treatments give highest yield (52.6 and 57.9 ton.ha"1) and marketable yield (51.5 and 55.8 ton.ha'1) for fall season as compared with the treatment yield ( 29.4 and 22.1 ton.ha"1 ) and marketable yield ( 26.4 and 20.7 ton.ha"1 ) for both control seasons, respectively. Significant increases occurred in fertilizer use efficiency and reached 123.9 and 161.0% in treatment 20% poultry residues with 20% Whey for both seasons, respectively. Tuber's Contents of amino acids was increased with increasing levels of either residue and the highest was in treatments of 20% (W/W) of both residue source and whey.

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