在２种水田土壤上采用盆栽、微区和小区试验，对稻草、玉米秸秆和未堆腐的马粪３种非腐解有机物料对水稻产量的影响进行了研究。试验结果表明，较高的有机物料施用量，在第一年引起水稻产量下降，但在第二年却有增产作用。较低的有机物料施用量，虽然在当年未对水稻生长发育产生显著的抑制作用，但第二年也没有显著的增产作用。有机物料的最佳施用量为２～４ｇ／ｋｇ。非腐解有机物料对水稻生长的抑制作用主要发生在水稻生长发育的前期，还原性物质的增加是产生这种抑制作用的原因之一。就不同的有机物料而言，这种抑制作用随着非腐解有机物料Ｃ／Ｎ比的增加而增加 The effects of three kinds of non-decomposed organic materials including straw, corn stover and non-heaping horse manure on the yield of rice were studied in two paddy soils. The results showed that the higher application rate of organic materials caused the decrease of rice yield in the first year, but increased the yield in the second year. The lower application rates of organic materials did not significantly inhibit the growth and development of rice in the current year, but there was no significant yield increase in the second year. The best application rate of organic materials is 2 ~ 4g / kg. The inhibitory effect of non-decomposed organic materials on rice growth mainly occurs in the early stage of rice growth and development. Increasing of reducing substances is one of the reasons for this inhibition. In the case of different organic materials, this inhibition increases with the C / N ratio of non-decomposed organic materials