[Objective] Organic carbon soil amendment was compounded to provide technical support for sustainable development of maize industry in Hexi irrigation area.[Methods] The study was conducted on the effect of organic carbon soil amendment on sandy soil in Ganzhou district

Zhangye City

Gansu Province through field experiment.[Results] The amount of soil organic carbon amendment was positively correlated with indices of porosity

aggregate

water holding capacity

organic matter

available nutrients

microbial biomass

enzyme activity and maize yield

while was negatively correlated with volume weight and pH value. After organic carbon amendment was applied

soil volume weight

pH value

Hg

Cd

Cr and Pb

were all decreased by 8.46%

4.87%

17.95%

27.78%

15.75% and 18.03% as compared with the effects of conventional fertilizer; indices of total porosity

aggregate

water holding capacity

organic matter

alkali-hydro nitrogen

available phosphorus and available potassium respectively increased by 8.15%

23.98%

8.15%

3.16%

0.10%

2.13% and 1.18%; fungi

bacteria

actinomyces

sucrase

urease

phosphatase and corn fertilizing profits increased by 59.18%

41.75%

23.28%

59.18%

13.54%

10.71% and 2

180.40 yuan/hm2

respectively.[Conclusion] The sandy soil physical and chemical properties and biological properties can be effectively improved by the application of organic carbon soil amendment

and the maize yield increased as well.