Effect of Continuous Plantation of Chinese Fir on Soil FertilityEnglish Full Text

DING YING-XIANG and CHEN JIN-LINNanjing Forestcy University, Nanjing 210037 (China)

Abstract: The changes in soil fertility under continuous plantation of Chinese fir were studied by comparing soilsamples from different forest stands: the first and second plantations of Chinese fir, evergreen broad-leavedforests, and clear-cut and burnt Chinese fir land located at Xihou Village, Nanping of Fujian Province. Thesoils were humic red soil originated from weathered coarse granite of the Presinian system. Soil PH, CEC,base saturation, exchangeable Ca￣（2+）, exchangeable Mg ￣（2+） and Al-P declined after continuous plantation ofChinese fir. The same trends were also found in the soils under broad-leaved stands and slash burnt lands.The explantation was that not merely the biological nature of the Chinese fir itself but the natural leachingof nutrients, soil erosion and nutrient losses due to clear cutting and slash burning of the preceding plantationcaused the soil deterioration. Only some of main soil nutrients decreased after continuons plantation ofChinese fir, depending on specific silvicultural system, which was different from the conclusions in some otherreports which showed that all main nutrients, such as OM, total N, available P and available K decreased.Some neccessary steps to make up for the lost base, to apply P fertilizer and to avoid buring on clear cutlands could be taken to preventsoil degradation and yield decline in the system of continuous plantation ofChinese fir.

Keywords：

Chinese fir; continuous plantation; slash burning; soil deterioration; soil fertility;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Forestry
Classification Code：
S714

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Effect of Continuous Plantation of Chinese Fir on Soil FertilityEnglish Full Text

DING YING-XIANG and CHEN JIN-LINNanjing Forestcy University, Nanjing 210037 (China)

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