Nutrient distribution and accumulation pattern of Chinese pin e plantations in Qiaoshan forested region

Abstract

Abstract: The contents,accumulation and distribution of 5 nutrient elements (N,P,K,Ca,Mg) were studied in 3 plots of Chinese pine plantations in Qiaoshan forested region in Shaanxi Province.The results showed that the nutrient content in various orga ns was in the order of needle>branch>root>bark>stem.In the 26 year plantati on,the storage of N,P,K,Ca and Mg was 214.44,22.91,158.88,167.36 and 29.42kg·hm^-2.The total element accumulation was 498.98 kg·hm^-2 in the tree laye r,3.32kg·hm^-2 in the shrub layer,7.31kg·hm^-2 in the herb layer and 8 3.40kg·hm^-2 in dead soil covering layer.The enrichment ratios of N,P,K, Ca and Mg in Chinese pine plantation were 3.98,4.28,5 69,1.08 and 4.01.The net pr oduction of organic matter per ton needs a total five elements of 8.43～9.09kg· hm^-2·yr^-1.The total nutrient elements accumulation in tree layer wa s 288.26～606.07kg·hm^-2,of which stem accounted for 14.1～16.8%.

CLC Number:

S791.254

GAO Jiarong, XIAO Bin. Nutrient distribution and accumulation pattern of Chinese pin e plantations in Qiaoshan forested region[J]. Chinese Journal of Applied Ecology, 2001, (5): 667-671.

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