比较高分子材料不同施用量对新垦耕地土壤的培肥效果，可为促进新垦耕地快速熟化提供科学依据。以狗牙根为供试作物，通过盆栽试验，研究不同羧甲基纤维素钠(Sodium carboxymethyl cellulose，CMC)施用量(0.04%、0.08%、0.12%、0.16%、0.20%)与蚯蚓粪、复合生物菌剂混施对新垦耕地狗牙根生长和土壤养分的影响。结果表明：与CK相比，不同施用量CMC配合施肥处理下，狗牙根地上部和根系生物量均显著增加，是CK处理的33.8~37.5、5.0~5.9倍，根冠比显著降低84.1%~86.3%，以0.16% CMC处理狗牙根生物量最高；施用CMC处理土壤养分含量有显著影响，土壤有机质、全磷含量在0.16% CMC处理下为最大值，较CK处理分别显著增加187.9%、19.2%；土壤>0.25 mm水稳性团聚体含量显著增加24.2%~138.9%，以0.20% CMC处理为最大值。综合而言，以0.16% CMC施用量对狗牙根生长的促生作用和土壤有机质、全磷含量的培肥作用最佳，以0.20% CMC施用量对土壤水稳性团聚体含量改良作用最好。

Exploring the effects of different application rates of polymer materials on soil fertility in new cultivating farmland is helpful to provide a scientific basis for rapid maturation of new farmland. Bermudagrass was used as the research material and a pot experiment was conducted to explore the effects of sodium carboxymethyl cellulose (CMC) (0.04%, 0.08%, 0.12%, 0.16% and 0.20%) mixed with vermicompost and compound biological inoculants on plant growth and soil nutrients in new cultivating farmland. The results showed that the overground part and root biomass of bermudagrass were significantly increased under different CMC treatments, which were 33.8-37.5 and 5.0-5.9 times than those of CK, respectively, and the root-shoot ratio was decreased by 84.1%-86.3%. The biomass of bermudagrass showed the highest value in 0.16% CMC treatment. The CMC treatments had significant effect on soil nutrient content, the content of soil organic matter and total phosphorus showed the maximum value in 0.16% CMC treatment, which were 187.9% and 19.2% higher than those of CK, respectively. The >0.25 mm water-stable aggregate content was significantly increased by 24.2%-138.9% in CMC treatment, and the highest value was found in 0.20% CMC treatment. In conclusion, the 0.16% CMC treatment had the best effect on the growth promotion of bermudagrass and the increase of soil organic matter and total phosphorus contents, while the best effect on the improvement of soil water-stable aggregate was achieved in 0.20% CMC treatment.