Effects of Diatomite Application on Yield and Nitrogen Use Efficiency of Rice
In order to determine the effects of diatomite(Si),N(N),and combination of N and diatomite(N+Si)on rice yield and nitrogen use efficiency,experiments were conducted in Jingzhou,Hubei province from 2021 to 2022,with no diatomite and nitrogen as control(CK).The yield,its components and nitrogen use efficiency were measured and analyzed.The results showed that,compared with CK,Si treatment had no significant effect on rice yield.But compare with N,N+Si treatment significantly increased the yield by 39.26％and 19.80％in 2021 and 2022,respectively.The higher yield observed for N+Si treatment were attributed to higher effective panicle number,seed-setting rate and 1000-grain weight.In addition,compared with CK,Si,N and N+Si treatments significantly increased the above-ground dry matter accumulation at rice maturation,in the order of N+Si＞N＞Si＞CK.Compared with N,N+Si treatment significantly improved the nitrogen recovery efficiency,nitrogen agronomic efficiency,nitrogen physiological utilization efficiency and nitrogen partial factor productivity,but significantly reduced the nitrogen harvest index.In summary,the combination of diatomite and nitrogen fertilizer can significantly improve the yield,biomass and nitrogen fertilizer utilization of rice in the Jianghan plain.
RiceDiatomiteYieldDry matter accumulationNitrogen use efficiency
NETL
NSTL
万方数据
