The average yield of API and FPI is lower than that of BPI, but the amount of water use for API and FPI is less than that of BPI. It shows API and FPI can enhance the efficiency of irrigation water use.

• API和FPI的平均产量与BPI的相比有所降低,但是其灌溉水量相对减少,说明了API和FPI能明显提高灌溉水利用效率。