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《Journal of Fujian Agriculture and Forestry University(Natural Science Edition)》 2013-03
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Difference of soil soluble organic nitrogen concentration in tea plantation by various extractions

ZHOU Bi-qing1,ZHANG Li-ming1,MAO Yan-ling1,ZHANG Jin-biao2,XING Shi-he1(1.College of Resource and Environment;2.College of Life Science,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China)  
The difference of soil soluble organic nitrogen(SON) concentration in two tea ecosystems with different tea genotypes(Huangdan and Fuyun 6) but the same soil parent material and soil type was studied by H2O(room temperature),H2O(70 ℃) and KCl(2 mol·L-1) extractions.The results showed that the concentrations of SON by H2O(room temperature),H2O(70 ℃) and KCl(2 mol·L-1) extractions at upper(0-15 cm) and lower(15-30 cm) layer in tow tea plantations were significantly or highly significantly different,and showed SONKCl(2 mol·L-1)SON(70 ℃ H2O)SON room temperature H2O).The mean concentrations of SON at upper layer in Huangdan plantation by H2O(room temperature),H2O(70 ℃) and KCl(2 mol·L-1) extractions were 9.62%,17.93% and 11.64% higher than those at lower layer,and those at upper layer in Fuyun 6 plantation were 36.57%,46.23% and 25.54% higher than those at lower layer,respectively,and showed significant or highly significant vertical difference in both tea plantations.The mean SON contents at upper layer in Huangdan plantation by H2O(70 ℃) and KCl(2 mol·L-1) extractions were 17.44% and 7.88% higher than those in Fuyun 6 plantation,respectively,and showed significant difference.The results indicated that SON concentrations in tea plantations were significantly varied with extracting method and tea genotype.
【Fund】: 国家自然科学基金项目(31170485);; 教育部博士点基金项目(20113515110013 博导类);; 福建省自然科学基金项目(2011J01259);; 福建省教育厅科技计划项目(闽教科[2010]33号)
【CateGory Index】: S153.6
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