Effect of Potassium Fertilization on Growth, Yield and Water Use Efficiency of Irrigated Potato

Abstract

Studies on the effect of K fertilizers application in increasing water use efficiency (WUE) and decreasing the negative effect of water stress, are quite limited, especially under field conditions. A field experiment was conducted in silty clay loam in the Agricultural Research Station of Abu-Graib-Baghdad, Iraq to study the effect of different levels of K fertilizers application on potato (Solanum tuberosum L.( and their role in decreasing negative effect of water stress.Treatments include four levels of K fertilizer (0, 200, 400 and 600 kg K 2 SO 4 ha -1 ) and two levels of irrigation (after depletion of 50 and 75 % of available water). Results revealed the following:-* Prof. Soil Sci. Dept. -Coll. of Agric. -Univ. of Baghdad -Iraq. ** Assoc. Prof. Soil Sci. Dept. -Coll. of Agric. -Univ. of Baghdad -Iraq.

Effect of Different Irrigation Intervals and Treatments on Yield Quantity and Quality of Potato (Solanum Tuberosum L.) Under Field Conditions in Sulaimani, Iraqi Kurdistan Region

“…Since the numbers of Barznjy irrigation were 9 and 5 times for 5 and 10 days of irrigation intervals respectively, while accumulate depth irrigation and precipitation were (513 and 437 mm) respectively. These results are in agreement with the findings of several other kinds of research (Ati et al, 2013;Ati and Nafaou, 2012). Gander and Tanner (1976) showed that mild water stress of -3 to -5 bars greatly reduce leaf expansion in potatoes, and for best tuber yields, a 120-150 day potato crop requires 508-698.5 mm of the water.…”

Effect of Irrigation Intervals, Biotic and Abiotic Treatments on Water Use Efficiency and Potatos Yield in Sulaimani – Iraqi Kurdistan Region

“…5. These results are in agreement with the findings of several other researches Ati and Nafaou, 2012). Gander and Tanner (1976) showed that mild water stress of -3 to -5 bars greatly reduce leaf expansion in potatoes, and for best tuber yields, a 120-150 day potato crop requires 508-698.5 mm of the water.…”

The Effect of Depth of the Smart Artificial Subsurface Irrigation Pipes and the Distance on the Efficiency of the System Performance and Yield of Sunflower

“…The results show that the distances between the pipes had a significant effect on increasing moisture content of the soil, where the distance 60 cm gave the highest moisture content of 21.21%. The reason is that the close of the distance between the irrigation pipes leads to an increase in the area of the irrigated area, and thus an increase in the amount of water relative to the dry soil mass, and leads to an improvement in soil structure, and is consistent with the results obtained by [11]. The results also show the significant effect of the interaction between the depth of the irrigation pipes and the distance between them on the soil moisture content.…”