湘中丘陵区不同经营目标对毛竹林土壤养分库的影响
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林业公益性行业科研专项(201104008)和国际竹藤中心基本业务专项(1632008005)


Influence of different managing targets on soil nutrient pools of Phyllostachy edulis forests in hilly region,central Hunan
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    摘要:

    以湘中丘陵区毛竹笋用林(Ⅰ)、笋材兼用林(Ⅱ)、材用林(Ⅲ)为研究对象,考察不同经营目标对毛竹林的土壤养分特征、养分库综合指数以及养分相关关系的影响。结果表明:毛竹笋用林、笋材兼用林、材用林0~60 cm土层土壤有机质、全氮、水解氮、全磷、有效磷、全钾和速效钾含量随着土层下降总体呈降低趋势,变化范围分别为18.88~40.24 g/kg、1.08~2.19 g/kg、60.00~200.00 mg/kg、0.36~0.52 g/kg、0.84~4.07 mg/kg、11.29~23.46 g/kg和31.72~86.70 mg/kg。毛竹笋用林土壤有机质、全氮及速效钾含量较高,笋材兼用林水解氮、全磷及有效磷含量较高,毛竹材用林土壤全钾较丰富。土壤养分库综合指数以毛竹笋材兼用林最高,笋用林次之,材用林最低,分别为3.908 1、3.522 8和3.265 0;湘中丘陵区毛竹林土壤有机质、全氮、水解氮比较丰富,而土壤普遍缺乏磷素、钾素。土壤有机质与全氮、水解氮、全磷、有效磷和速效钾均呈显著正相关,全氮与水解氮、全磷与有效磷之间也存在显著正相关。

    Abstract:

    Based upon the case of the hilly region in central Hunan,soil nutrient pool contents,integration indexes and Pearson coefficients among nutrient elements were studied for three typical managing target patterns,which included shoot utilizing stands (Ⅰ),shoot and timber utilizing stands (Ⅱ) and timber utilizing (Ⅲ) of Phyllostachy edulis forests.It was found that soil nutrient pool contents decreased obviously in the profiles within 0~60 cm.In different patterns and soil layers,the contents of organic matter (OM),total nitrogen (TN),available nitrogen (AN),total phosphorus (TP),available phosphorus (AP),total potassium (TK) and available potassium (AK) were 18.88-40.24 g/kg,1.08-2.19 g/kg,60.00-200.00 mg/kg,0.36-0.52 g/kg,0.84-4.07 mg/kg,11.29-23.46 g/kg and 31.72-86.70 mg/kg,respectively.In type Ⅰ,the contents of OM,TN and AK were relatively high,and the contents of AN,TP and AP were higher in type Ⅱ,the contents of TK were higher in type Ⅲ.Soil nutrient pool integration indexes was the highest in type Ⅱ,followed by type Ⅰ and Ⅲ,with score of 3.908 1,3.522 8 and 3.265 0.For the hilly region in central Hunan,the contents of soil OM,TN and AN were plentiful and phosphorus and potassium elements were in short universally in P.edulis forests.The contents of soil OM were positively correlated with TN,AN,TP,AP and AK,and there also existed Pearson coefficients between TN and AN,TP and AP.

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漆良华,孟 勇,岳祥华,范少辉,艾文胜,刘广路,杜满义.湘中丘陵区不同经营目标对毛竹林土壤养分库的影响[J].华中农业大学学报,2012,31(5):584-588

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  • 收稿日期:2011-09-05
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