Yield of rice and yield compositions under different fertilization
There were significant correlations between the cumulative yield of rice and the time (year) under six years fertilization (Fig.4), indicating that in all treatments there was the same trend of cumulative yield increasing with years. The cumulative yield in NPKM, NPK, M, and PK treatments were 73.2, 70.2, 69.7, and 43.6 t ha-1 respectively. The stability of yield with application of organic manure plus chemical fertilizer was more obvious than that with chemical fertilizer alone and control
according to the determination coefficient (R2).