期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2009

35

4

420-422

基金项目：国家科技支撑计划项目（2006BAD17808-03）

本校为第一机构

为加强洞庭湖区菜园土壤的养分管理,控制其养分流失,采用传统统计和地统计学相结合的方法,研究其土壤养分含量的空间变异特征和分布规律.结果表明,土壤碱解氮、有效磷、速效钾含量分别为54.2～315.3、10.9～64.8、19.5～87.9 mg/kg,有机质含量为14.53～26.22 g/kg,养分含量较高.土壤主要养分属于中等变异,变异系数为0.1～1.0.从趋势分析看,土壤碱解氮、有效磷、速效钾、有机质含量从东向西和从南到北均呈一阶线型变化.从空间分布结构看,碱解氮和有机质含量呈基本一致的空间环状分布,以菜园地中心区较低;有效磷由东南向西北呈条带状分布,中部含量较高,速效钾含量由东南向西北呈马鞍形分布.

Spatial variability and distributing rules of nutrients content in vegetable soil were studied using traditional statistics and geo-statistics in order to implement nutrient management and control its losses in Dongting Lake. The results showed that： the content of available nitrogen, phosphorus and kalium were respectively 54.2-315.3 mg/kg, 10.9--64.8 mg/kg, 19.5~87.9 mg/kg, and organic matter ranged from 14.53 to 26.22 g/kg, the level of nutrient content was high. The variable coefficient of main nutrient content was between 0.1 and 1.0, whi...