建瓯市毛竹林土壤速效氮磷钾含量及空间分布

Spatial Distribution of Available Nitrogen,Phosphorus and Potassium in Phyllostachys heterocycla Forest Soils in Jian'ou City

采集建瓯市毛竹林表层(0～20 cm)土壤,分析其氮磷钾速效养分含量及空间分布。结果表明:建瓯市毛竹林表层土壤碱解氮平均含量为166.7 mg.kg-1,高于农田土壤碱解氮含量;速效磷含量为9.93 mg.kg-1,低于毛竹生长所需;速效钾含量为55.4 mg.kg-1,低于毛竹生长所需。地统计学分析结果表明,速效钾、速效磷、碱解氮具有中等空间相关性,氮含量的变异性主要由随机性因素引起。建瓯市毛竹林土壤速效养分存在富氮低磷缺钾的现象,在生产实践中应重视磷肥和钾肥的施用。

Phyllostachys heterocycla forest surface soils（0~20 cm） in Jian＇ou City were collected,the contents and spatial distribution of available nitrogen,phosphorus and potassium were analyzed.Results showed that the average available nitrogen content in the bamboo soils was 166.7 mg·kg-1,which was higher than that in farmland soils.The content of available phosphorus was 9.93 mg·kg-1,which was low for the bamboo growth.The content of available potassium was 55.4 mg·kg-1,which was slightly lower than that required for the normal growth of bamboo.Results of geo-statistical analysis showed that available potassium,phosphorus and nitrogen had mid co-relationship in spatial variation.The variation of available nitrogen distribution was mainly resulted from random factors rather than human beings.The bamboo soils in Jian＇ou were rich in available nitrogen and less of phosphorus and lack in potassium,it was important to apply phosphate and potassium fertilizer for high output of bamboo products in the future.