Research Progress of Potassium Fertilizer Controlling Rice Yield under High Temperature
The extreme high temperature weather caused by global warming have serious effects rice production.It is of great significance to investigate the mechanism of high temperature injury and the cultivation regulation measures to clarify rice high temperature injury.This paper reviewed the effects and mechanisms of high temperatures on the rice yield formation at the panicle initiation stage,heading stage,and grain filling stage in recent years,including the physiological and biochemical processes such as pollen development,spikelet fertility and grain filling,production and elimination of active oxygen,sugar metabolism,hormone changes,etc.Potassium is involved in the regulation of multiple physiological processes of plants.Therefore,this paper discusses the possible role of potassium fertilizer in alleviating rice high temperature stress from the aspects of the regulation of"source-flow-sink",pollen germination and pollen tube elongation,and the steady state of active oxygen and hormones.We also summarizes the regulation of different cultivation measures on rice yield formation under high temperature.Combined with the existing research,the prospect of optimizing potassium fertilizer management to improve the heat resistance of rice were prospected.
High temperature stressRiceYield formationCultivation measuresPotassium fertilizer
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