潼关县土壤养分含量及分布特征

利用2013年渭南市潼关县测土配方施肥补贴项目测定的土壤p H值及有机质、碱解氮、有效磷、速效钾含量数据,对潼关县土壤养分含量状况进行评价,并对其空间分布特征进行分析,为当地合理施肥、提高粮食产量提供理论依据。结果表明,潼关县土壤p H值为8.47,属于碱性,呈弱变异。土壤有机质含量为14.56 g/kg,碱解氮、有效磷、速效钾含量分别为82.02、16.26、149.98 mg/kg,其中碱解氮和有机质含量处于低肥力水平,有效磷和速效钾含量处于中等肥力水平。土壤各养分含量之间呈极显著正相关,均与p H值呈极显著负相关。从空间分布来看,潼关县土壤p H值总体由南向北逐渐增大;土壤有机质和碱解氮含量由南向北递减,且西南角含量最高;速效钾含量总体表现为东北部和西南部地区含量较高;有效磷含量由东北向西南逐渐增高。

Soil Nutrient Content and Distribution Characteristics in Tongguan County

Using the data from soil testing formula applying fertilizer project in Tongguan county in 2013 , the pH value, contents of organic matter, available nitrogen, available phosphorus, available potassium were evaluated,and the spatial distribution characteristics were analyzed. The results showed that soil pH value was 8. 47,being alkaline,belonged to the weak variation. The organic matter,available nitrogen, available phosphorus and available potassium contents were 14. 56 g/kg,82. 02 mg/kg,16. 26 mg/kg and 149. 98 mg/kg, the available phosphorus and available potassium contents were at the medium level, available nitrogen and organic matter contents were at the low fertility level. There were significant positive correlations among contents of soil nutrient elements,and significant negative correlation between contents of soil nutrient elements and pH value. From the aspect of spatial distribution, pH value gradually increased from south to north; the contents of organic matter and available nitrogen decreased from the south to the north,and the highest level in the southwest corner; the available phosphorus content were higher in northeast and southwest regions;the content of available phosphorus increased from northeast to southwest.