Effect of plant growth agents application through leaf spraying on the yield of Poa crymophila cv. Qinghai and Festuca sinensis cv. Qinghai

Four kinds of plant growth agents (Penshibao, Sanxiaolvyeshen, KH2PO4 and GGR6) were sprayed on the leaves of Poa crymophila cv. Qinghai and Festuca sinensis cv. Qinghai respectively to study the effect on seed yield. The results indicated that 4 plant growth agents could increase the yield of the fresh grass, seed and underground biomass and the effect of KH2PO4 was the best. and it could be concluded that 4 agents could be extended for grass production.