Water use efficiency responses in relation to specific ionic sources (Ct sup-1 and SO4 sup-2)
2007
Hanzah, M. | Jaafar, H.Z.E., Universiti Putra Malaysia, 43400 Serdang, Selangor (Malaysia). Dept. of Crop Science | Haniff, M.H., Malaysian Palm Oil Board, P.O. Box 10620, Kuala Lumpur (Malaysia). Dept. of Biology | Aziz, M.A., University Putra Malaysia, 43400, Serdang, Selangor (Malaysia). Dept. of Agriculture Technology
A glasshouse study was conducted at Agriculture Faculty Glasshouse Complex, Universiti Putra Malaysia to determine the effects of specific potassium ionic from different sources of potassium(K) on young oil palm seedlings. Experimental design carried out Randomized complete Block Design(RCBD) with factorial combination of treatments where the factors were oil palm progeny(Deli Yongambi and Deli Avros), sources of potassium(Potassium Chloride and Potassium Sulfate) and rates of potassium(0,50, 100 and 150). Results show that there are significant difference between K sources on WUE(p less or equal to 0.05).Rates of K also significantly different(p0.05) where WUE for rate of K at 150 is 120.69% higher than control while for rate 0 and 50 are 78.41% and 98.08%. Interactions were observed between sources and rates of K also between progenies, sources and rates of K at week 16. For potassium chloride, increasing rates of K from 0 to 100 will increase WUE. WUE decreased at rate 150 for potassium chloride. For potassium sulfate, WUE increase when rate increase from 0 to 50 and start decreasing with increasing rate to 100 and 150. Significantly different for sources and rates of K at week 8 after treatments, interaction also occurs between sources and rate at week 4 after treatments. Regression analysis was carried out to study the relationship between water use efficiency(WUE)and stomata conductance. There are significant relationship between water use efficiency and stomata conductance with R2
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