Kishor Sherchand, G. M. Paulsen
Dec 1, 1985
Citations
1
Influential Citations
22
Citations
Journal
Journal of Plant Nutrition
Abstract
Abstract Potassium phosphate (KH2PO4) is applied commonly in dilute foliar sprays to wheat (Triticum aestivum L.) in China. Yield responses to foliar P sources have also been reported for several crop species in other countries. Experiments were conducted to determine efficacy of four P sources and four rates of KH2PO4 as foliar treatments on wheat under field conditions and KH2PO4 under two controlled temperature regimes. Grain yields were increased most by KH2PO4 followed by β‐glycerophosphate and tripolyphosphate; only phytic acid was ineffective. All rates of 1 to 4 kg ha‐1 KH2PO4 increased grain yields. Foliar KH2PO4 applications increased grain weight early under low controlled temperatures, but did not affect final grain weight under either temperature regime. Beneficial effects of foliar P treatments were associated with increased plant P content, which may have increased cell sugar content and protected membranes. Although preliminary results are favorable, additional research is needed to determ...