Abstract:

The trial of soil fertility monitoring was carried out in Chinese fir woodland at Zhongchao(25°44′to 26°31′N latitude, 108°37′to 109°31′E longitude, Altitude 500 to 670 m), Located in Liping Countv, Guizhou Province. The trial area was 1.44 hm². The trial resuits were as follows:1. After fertilization, the chemical and physical properties of soil in Chinese fir woodland improved apparently. In the second year after fertilization, the contents of available P in the P₂ treatment and the P₂K₁treatment increased 13% and 21% respectively, compared with control, while the content of the availableK and the slowly available K increased 20% and 19.5% respectively comparing with control. In the fourthyear after fertilization, the content of P in the treatment of P₂ and P₂K₁ increased 25% and 28% comparing to control, and the rapidly available K and the slowly available K in the P₂K₁ treatment increased 21% and 29% respectively.2. The soil fertility of Chinese fir woodland decreased year by year after planting. In the fifth year after planting, the decline proportion of N, P and K content in the soil located at 40 cm from the trunk, was lower than that in the soll which was 80 cm from the trunk.

Key words: Chinese fir, Woodland, Soil fertility, Monitoring