تأثير الرش بالمغذي العضوي vit-org في نمو ومكونات حاصل البطاطا

Abstract EN

An experiment was conducted in the fields of the Department of Horticulture-College of Agriculture- University of Baghdad, to study the response of potato (Solanum tuberosum L.) cv.

Desiree to the spraying of organic nutrient (Vit-org) at different concentrations, which is produced by GREEN HAS ITALIA Co.

during spring season of 2008.

The liquid organic nutrient contains [organic nitrogen (N) soluble in water (3 % w / w), potassium oxide (K2O) soluble in water (6 % w / w), organic carbon (C) from biological origin 18 %, organic matter (31% w / w)].

Plants were sprayed until dripping, after ten days of emergence at concentrations of (0, 3, 4.5 and 6 ml / l H2O).

The plants were divided into three groups and the process of spraying was repeated twice after the first spray, within (15) days interval.

A randomized complete block design was used with three replicates.

The results showed that plants sprayed with high concentration of organic nutrient for three times have significantly increased plant height to 76.67cm and number of leaves to 91.6, number of branches to 6.3per plant, leaf area 8921 cm 2 , chlorophyll content to 50 SPAD unit, and plant dry weight to 122.70 g / plant, while the control treatment reached 47.0 cm plant height, 49.0 leaf, 3.40 branches, 5213 cm 2 leaf area, 41.60 SPAD unit, and plant dry weight 63.25 g / plant ,respectively.

The results of yield and its components were influenced in the same direction as the vegetative growth is done, dry weight percent of tubers was 25.73 %, tubers firmness 11.40 kg / cm 2, T.S.S was 5.50, and the number of tubers per plant was 8.33 with average weight 123.58 g, the yield per plant was 1.029 kg while the control treatment gave means as 19.92 % of dry weight percent of tubers, tubers firmness 10.56 kg / cm2, 4.23 T.S.S, 4.22 tuber, 94.36 g, 0.398 g , respectively.

According to that we conclude that using organic nutrient will improve quality and quantity of production and conserve environment.