植被混凝土护坡基材pH、有机质及其与速效养分的相关性分析

Analysis of pH,Soil Organic Matter and the Correlation to Available Nutrients in Substrate of Vegetation-growing Concrete Gunning

采集了宜昌境内4处采用植被混凝土生态防护边坡的33个基材土壤样品,对其pH值、有机质和速效N、P、K含量进行测定,分析pH值、有机质含量与速效养分含量的相关性。结果表明：植被混凝土护坡基材pH值为7.73~8.39,属于微碱性和碱性土壤;有机质含量为9.29~18.75 g/kg,属于极低水平和较低水平;速效氮含量为34.34~46.10 mg/kg,速效磷为96.86~146.13 mg/kg,速效钾为196.98~333.53 mg/kg。4个边坡的速效氮含量均属于较低水平,速效钾、速效磷含量均为高水平。pH与有机质、速效K含量呈极显著负相关,与速效N和速效P含量均呈负相关,但不显著;有机质与速效N含量呈极显著正相关,与速效K和速效P含量均呈负相关,但不显著。表明植被混凝土护坡基材的pH值和有机质影响着土壤速效养分的含量。

In this paper,Soil pH value,organic matter,available N,available P and available K of 33 soil samples obtained from 4 slopes protected by ecological protection technology of vegetation-growing concrete gunning were measured.The correlation between soil pH,organic matter and available nutrients were analyzed.The results showed that the pH values of soils ranged from 7.73 to 8.39 belonging to mild alkaline and alkaline soils.There were low and lower contents of organic matter ranging from 9.29 to 18.75 g/kg.The content of available N ranged from 34.34 to 46.10 mg/kg,available P ranged from 96.86 to 146.13 mg/kg,available K ranged from 196.98 to 333.53 mg/kg.The contents of available N belonged to a lower level,available K,P belonged to high levels in these 4 slopes.The correlation between pH and organic matter,available K was significantly negative,and the correlation between pH and available N,available P was positive;the correlation between organic matter and available N was significantly positive,and the correlation between organic matter and available K,available P was negative.It was showed that the contents of soil available nutrient affected by the pH value and organic matter of substrate of vegetation-growing concrete gunning.