耕地土壤养分元素调查与评价:以贵州惠水涟江高效农业园区为例

Investigation and evaluation of soil nutrient elements in cultivated land:a case study of Lianjiang High-efficiency Agricultural Park in Huishui,Guizhou Province

为了厘清惠水涟江高效农业示范园区耕地土壤养分元素特征及来源,本文采集与分析了园区耕地土壤样品,获得其养分和微量元素含量,并系统总结与分析了养分元素的地球化学特征及理化特性影响因素.研究结果表明:1)337件样品中养分元素N、P、K_(2)O、SOM含量平均值分别为2.11、513、11.7和4.21 g/kg,且N、P、K_(2)O、SOM含量呈正态分布.2)N与SOM含量呈显著正相关,与K_(2)O呈显著负相关;P与K_(2)O、pH呈显著正相关;K_(2)O与P、pH呈显著正相关,与N、SOM含量呈显著负相关.3)园区耕地土壤养分元素总体表现为“富N,贫P、K、SOM”;养分元素含量不仅受到土壤类型、酸碱度等因素影响,还与土地利用方式等人为活动密切相关.

In order to clarify the characteristics and sources of soil nutrient elements in the cultivated land of Lianjiang High-efficiency Agricultural Park in Huishui,the soil samples of cultivated land in the park were collected,analyzed and tested,and the contents of nutrients and trace elements were obtained,the geochemical characteristics and physical and chemical characteristics of nutrient elements were systematically summarized and analyzed.The results show that:1)the average contents of nutrient elements N,P,K_(2)O and SOM in 337 samples are 2.11,513,11.7 and 4.21 g/kg respectively,and the contents of N,P,K_(2)O and SOM show normal distribution.2)N content is positively correlated with SOM content and negatively correlated with K_(2)O content,P content is positively correlated with K_(2)O content and pH content,K_(2)O is positively correlated with P contentand pH content,and negatively correlated with N contentand SOM content.3)The soil nutrient elements in the cultivated land in the park are generally“rich in N,poor in P,K and SOM”,and the content of nutrient elements is not only affected by soil type and potential hydrogen,but also closely related to human activities such as land use.