as demonstrated in table 2, the germination time of wheat was prior to corn germinated first four days, there was no comparability in terms of germination energy among corns. meanwhile, the germination energy of wheat in programs II and III was obvious superior to that in the control experiment I. the germination rates of corn and wheat both exceeded 60%, and the germination rates of other programs were all no less that of the control experiment I except the program VI of wheat. with the increase of the dry weight of composted sludge, the crop height was increased firstly followed by a declining tendency ( table1) . among which,the average height in program II was higher than that in control experiment I, whereas program VI was significantly lower than that of I. therefore, it can be seen that the composted sludge with dry weight of 1% can promote the germination and growth of corn and wheat, whereas more than 10% played an inhibition effect. especially when the dry weight of composted sludge was 50% the average heights of corn and wheat were respectively 18.3% and 26.3% of the control group I. this indicated that crops were resistant against the excessive composted sludge, which was in agreement with the research results of wang xiaodong et at18 . they believed that plants can cope with threats through adjusting the intercellular co2 concentration the bphotosynhesis cells, so as to prevent the plant cells from