非腐解有机物培肥对水稻产量的影响

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种非腐解有机物对水稻产量的影响进行了研究，试验结果表明，较高的有机料料施用量，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

Effects of the Undecomposed Organic Materials on the Rice Yield in the Paddy Soils

Effects of the undecomposed organic materials(UOM) including rice straw,corn stalk and horseshit on the rice yield were studied by pot,small plot and plot tests in two kinds of paddy soils. In the first year,the rice yield with higher applied amount UOM was decreased and the rice yield with lower applied amount of UOM had insignificant alteration. During the second year, the rice yield with higher amount of UOM was greatly increased and the lower amount still had no effects on the rice yield. The decrease of the rice yied with higher applied amount of UOM was related to the increase of reducing materials in the paddy soils. The inhabiting effect happened in the earlier stage of application of UOM and increased with C/N of UOM. The best applying rate of UOM to paddy soil was from 2g/kg to 4g/kg.