Abstract:

Fertility status in orchard soil was investigated and assessed by collection and analysis of the soil samples in 9 gardens of “Golden Orchard”, Chongqing. It was found that all of the orchard soil showed strong acidity with pH lower than 4.55, and pH decreased with the depth of soil layer increasing. Based on the classification standard of soil nutrients in the second soil investigation of China, the contents of soil organic matter, total nitrogen, available nitrogen, and available phosphorus in the surface layer soil of each garden reach moderate or mid-high level; that of total phosphorus, total potassium, and available potassium were relatively lower, and kept deficient status. The nutrient contents of orchard soil at different depths showed distinct difference, the contents at surface soil were much higher than that at 20-40 cm soil. Fertility status of the two organic fertilizers (chicken manure and seedcake) which were commonly used in “Golden Orchard” was also examined, and found that the content of organic matter in seedcake was higher than that in chicken manure, whereas the proportion of phosphorus, nitrogen, and potassium was difficult to meet the requirement of fruit trees by using the two organic fertilizers.