[Effects of fertilization on nutrient concentrations of different root orders' fine roots in Larix kaempferi plantation].

With the 16 years old Larix kaempferi plantation in eastern mountain area of Liaoning Province, China as test object, this paper studied the effects of fertilization on the nutrient concentrations of five root orders' fine roots. Under fertilization, less difference was observed in the total C concentration of the fine roots. Among the five orders' fine roots, the first order's had the lowest concentration of non-structural carbohydrate (TNC) and the highest ones of N and P, while the fifth order's was in adverse.

[Effects of fertilization on fine root diameter, root length and specific root length in Larix kaempferi plantation].

With 16 years old Larix kaempfersoil plantation in the mountainous area of eastern Liaoning Province as test object, this paper studied the effects of fertilization on the fine root diameter, root length, and specific root length (SRL) of the first to fifth order roots. The results showed that with ascending root orders, the mean fine root diameter and root length increased, while the SRL decreased significantly. Among the five order roots, the first order roots were the thinnest in diameter, the shortest in length, and the highest in SRL, but the fifth order roots were in reverse.