| To improve the fertilization technique of phosphorus (P) and provide basic theory for scientific fertilization of rice with drip irrigation under mulch, single factor randomized block design was used to study the effects of different P fertilization methods on the rice yield, yield structure, nutrient uptake and distribution characteristics at different growing stages, as well as the nutrient distribution in soil. The rice yield increased by 39.1% when the P was used at 40% base application and 60% drip fertilization. Plant's N and K contents were the highest at early growing stage. Plant's N, P, K uptake at tillering stage accounted for 30.72%, 19.31% and 22.32%, respectively. The N and P had the highest and weakest mobility, respectively, while K had the mobility between N and P. The N and K could be fully applied with drip irrigation, but the P should be applied mainly (60%) with drip irrigation and partially (40%) with base application. |
