الري و إضافة السماد العضوي و تأثيرهما في كفاءة استهلاك الماء و إنتاجية البطاطا

Abstract EN

An experiment was conducted in Research Station of irrigation technology, Soil and water Resources Centre Ministry of Sciences and technology in Tuwaitha location 40 Km East – South of Baghdad Iraq during the autumn season of 2013, to evaluate effect of reduced irrigation water quantities to maximize crop water use efficiency.

Using split – plote in Randomized Completely Block Design.

The experiment involved two factors, The first one contains 4 treatments: complete water consumptive – use of potato and irrigation when 10% water depletion (I1) control treatment, complete irrigation every other irrigation (I2), irrigation after 30% water depletion (I3) and irrigation after 60% water depletion (I4).

The second factor involve three levels of organic matter: without adding organic matter (M0), adding 15 ton.

ha-1(M1) and adding 60 ton.

ha-1 (M2).

The organic matter distributed to main – plot and the irrigation to sub – plots.

potato tubers of Desiree variety were planted in September 23th, 2013.

Flood irrigation was used after determining the irrigation depth and the dates of irrigation on the bases of water depletion by determining the volumetric moisture using sensitive moisture device (Diviner -2000) during the experiment period on the base of soil moisturing to the 0.30 m depth during the potato growth season.

The result showed that I3M2 treatment gave highest efficiency of water field use which reached 8.53 kg.

m-3, highest efficiency of water yield which reached 8.86 kg.

m- 3 and highest potato tuber yield of 35.20 Ton.

ha-1 with quantity of add water was 447.75 mm.

season-1 and with 430.93 mm.

season-1 of actual consumptive water use ( Eta.).