优化施肥对皖稻68生长和产量的影响

对皖稻68的施肥方式进行优化。于2006年在安徽省凤台县桂集乡的水稻田中,设置CK(不施肥),N 60∶30∶10(氮肥按基-蘖-穗60%-30%-10%施用,N、P2O5、K2O总量比例为1∶0.25∶0.25),N 40∶30∶30(N、P2O5、K2O总量比例为1∶0.30∶0.40),N 35∶20∶45(N、P2O5、K2O总量比例为1∶0.30∶0.40)4个处理,研究优化施肥对皖稻68生长和产量的影响。皖稻68在肥力水平中等的水稻田,以施氮量280kg/hm2,N、P、K比例为1∶0.30∶0.40,氮肥的运筹方式以基-蘖-穗为35∶20∶45的产量最高,达9 586.5 kg/hm2,比对照增产35.91%,肥料贡献率达到26.42%,比习惯施肥增产11.82%。在安徽省沿淮中稻区,水稻的氮、磷、钾用量比例应为1∶(0.3~0.6)∶(0.8~1.0)。皖稻68氮肥用量在240~300 kg/hm2。一定施肥水平下,在氮肥运筹上以基-蘖-穗比例为(30~40)∶(25~30)∶(30~45)为宜。

Influences of Optimizing Fertilization on the Growth and Yield of Rice Variety-Wandao 68

The aim was to optimizing the fertilization mode on Wandao 68.In paddy field of Guiji township in Fengtai county of Anhui province in 2006,influences of optimizing fertilization on the growth and yield of Wandao 68 were studied based on 4 treatments as: CK(no fertilizer),N 60∶30∶10(N fertilizer fertilized with the ratio of base-tiller-ear being 60%-30%-10% and total amount ratio of N,P2O5,K2O at 1∶0.25∶0.25),N40∶30∶30(total rate of N,P2O5,K2O at 1∶0.30∶0.40),N 35∶20∶45(total rate of N,P2O5,K2O at 1∶0.30∶0.40).In the paddy field with middle fertility,the yield of Wandao 68 in the treatment of N fertilizer of 280 kg/hm2 and the ratio of N,P,K at 1∶0.30∶0.40,whose yield was highest(9 586.5 kg/hm2) when N fertilizer management was that the ratio of base-tiller-ear was 35∶20∶45 and increased by 35.91% than that of CK,and its fertilizer contribution rate reached 26.42%,increasing by 11.82% than that with custom fertilization.In late rice region along Huaihe river in Anhui province,the N-P-K fertilization ratio in rice should be 1∶0.3～0.6∶0.8～1.0 and the N fertilization rate of Wandao 68 was 240～300 kg/hm2.Under certain fertilization level,the base-tiller-ear ratio at 30～40∶25～30∶30～45 was suitable in N fertilizer management.