湟中县域土壤养分变化分析

本文对湟中县域范围近年来土壤养分与第二次土壤普查数据比较,结果显示:pH值变化不大;有机质含量平均20.2g/kg,变化幅度较大;不同生态类型区养分含量提升幅度依次为:川水脑山浅山;全氮、全磷、全钾和碱解氮均有不同程度下降,速效磷和速效钾含量有所上升。微量元素除水溶态硼略低于土壤临界值外,有效态铜、有效态铁、有效态锰和有效态锌含量均高于土壤临界值。研究结果表明,测土配方施肥技术的推广应用,有利于耕地养分的改善。

Analysis on Soil Nutrient Content Change Huangzzhong County

Analyzed and compared the range of soil nutrient content in Huangzhong county, The results show that： compared to the second soil census data, all of the county ＇ s soil pI-I value change is not big, organic matter content about an average of 20. 2 g/kg was changed to a larger extent, Different ecological type nutrient content of ascension was as follows ： irrigation areas 〉 brain mountain 〉 shallow mountain. Total nitrogen, total phosphorus, total potassium and alkali solution nitrogen all have varying degrees of decline, availa- ble phosphorus and available potassium content increased. Trace elements in addition to water soluble state boron slightly lower than the critical value of the soil, effective state copper, effective state of iron, manganese and effective state of effective state of zinc content are higher than the critical value of the soil. The results of the study show that,in recent years along with the measuring soil fertilizer project development, Huangzhong County soils nutrient overall improve.