Effects of Different Fertilizer Applications on Rice Yield and Nutrient Absorption

JIN Cheng; FAN Jin-kai; JIANG Yan-ping; LIU Ji-xia

doi:10.13651/j.cnki.fjnykj.2025.05.004

Abstract：In order to explore the effects of different fertilizer applications on the growth traits and nutrient absorption of rice,a fixed-location experiment with three different fertilizer application methods,namely pure chemical fertilizer(CF)with equal input of nitrogen,phosphorus and potassium,50％organic fertilizer replacing chemical fertilizer(COF),and biochar-based fertilizer(CBF),was carried out in Huzhou City,Zhejiang Province,and compared with the treatment without fertilization(CK).The results showed that fertilization significantly increased the rice plant height,panicle length,effective panicle number,as well as grain and straw yields(P<0.05),with grain and straw yields increasing by 81.3％-93.4％and 85.4％-96.6％,respectively.However,no significant differences were observed among CF,COF and CBF treatments(P>0.05).Fertilization significantly increased the uptake of nitrogen(N),phosphorus(P)and potassium(K)in rice plants(P<0.05).Compared with the control group,N uptake in grains and straw increased by 100.7％-123.1％and 102.3％-118.6％,respectively;P uptake increased by 192.5％-112.8％and 97.5％-110.2％,respectively;and K uptake increased by 84.4％-104.8％and 87.2％-101.3％,respectively.Nevertheless,no significant differences were found among CF,COF and CBF treatments(P>0.05).Compared with CF,COF significantly improved N and P uptake utilization rate by 19.5％and 18.1％(P<0.05),while CBF significantly increased N and K uptake and utilization rate than that of CF by 17.4％and 16.9％(P<0.05).Additionally,the agronomic efficiency of fertilizer in COF and CBF treatment increased by 14.9％and 13.5％,respectively,compared with CF.In summary,the application of organic fertilizer substitution for chemical fertilizer and biochar-based fertilizer could be promoted in rice production in the future.