石灰与秸秆配施对冷浸田水稻产量与土壤特性的影响
Effects of combined application of lime and straw on rice yield and soil properties in cold waterlogged paddy field

以湖北省典型冷浸田为研究对象，研究石灰与秸秆配施对水稻产量与土壤特性的影响。结果表明，与对照处理（L0+S0）相比，石灰与秸秆的配施能显著提高水稻的产量、穗粒数、结实率和千粒重，增幅分别为46.0%、9.4%、6.7%和2.6%，N、P2O5、K2O的吸收量分别提高47.9%、50.3%和48.2%。与对照处理相比，石灰与秸秆配施显著降低土壤活性还原性物质总量和Fe2+含量，降幅分别为48.3%和38.1%，土壤氧化还原电位（Eh）显著提高48.7%。石灰用量1 500～2 250 kg/hm2、秸秆用量4 500 kg/hm2是较理想的配施模式。
The effects of combined application of lime and straw on rice yield and soil properties in the typical cold waterlogged paddy field in Hubei Province were studied to provide reference for decreasing the reducing substances in cold waterlogged paddy field.The results showed that compared with the no lime and straw treatment (L0+S0),combined application of lime and straw significantly increased the yield,grain number of per spike,seed setting rate and 1 000-grain weight,with the increase rates of 46.6%,9.4%,6.7% and 2.6%.The increase rates of the absorption of N,P2O5 and K2O were 47.9%,50.3%,and 48.2%.Combined application of lime and straw decreased the amount of soil active reducing substances and ferrous ion content,with the decreased rate of 48.3% and 38.1%.The soil Eh was increased by 48.7%.Combined application of lime and straw had a good effect on decreasing the reducing substances and improving cold waterlogged paddy field.The combined application of lime 1 500-2 250 kg/hm2 and straw 4 500 kg/hm2 was ideal.