China major limiting factors for rice production

Yield increase follows foliar spray with Multi-K indicates that Potassium is one of the major limiting factor for higher crop productivity



Rice/ Quality hybrid

Country / location China / Guangxi province, southern China
Objectives Find the major limiting factor for rice production among the following: micronutrients, growth substances, & potassium. Multi-K, MKP
Haifa product tested Multi-K
Application method Foliar nutrition
Tested treatment 2 x Foliar feeding @ 4% Multi-K & 600 lit./Ha
Control treatment results Yield = 4529 Kg/Ha
Best treatment results Yield = 5241 Kg/Ha
Characteristics of best treatment Yield increase:  712 Kg/Ha (15.8% above control)
Grower’s revenue from yield: 157 US$/MT
Cost of treatment (application + material) 22 US$/Ha
Net benefit of best treatment 112 US$/Ha
Benefit/Cost ratio 5.1
Conclusions Local: Potassium was found to be the major limiting factor for good yields, under the prevailing conditions.
Reference S. Peng & S&F Institute, Guangxi AAS