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为了解杭州市余杭区农地土壤肥力质量状况及其演变,从该区采集1 492份具代表性农地土壤样品,用常规分析方法测试土壤p H值、阳离子交换量、有机质、全氮、有效磷、速效钾、4种中量元素和6种微量元素等肥力指标,探讨第2次土壤普查以来主要土壤养分指标的变化趋势。结果表明,余杭区大多数农地土壤呈弱酸性和酸性;阳离子交换量以中等水平为主;有机质含量以中等水平为主;全氮含量以中高水平为主;全区土壤有效磷和速效钾含量较高;有效硫含量以中等水平为主,并与土壤有机质含量呈正相关;有效钙、有效镁以中高水平为主,与p H值呈正相关;土壤有效硅含量较高;有效铁、锰、铜、锌含量丰富,但有效硼、钼较低。区内土壤养分水平因农业地貌差异呈明显的区域变化,与第2次土壤普查结果比较,26年来余杭区农地土壤有机质、全氮、有效磷、速效钾等主要养分均升高,增加幅度以速效钾最大。
In order to understand the status of soil fertility and its evolution in Yuhang District of Hangzhou, 1 492 representative farmland soil samples were collected from this area. The soil p H value, cation exchange capacity, organic matter, total nitrogen, Available phosphorus, available potassium, four kinds of medium elements and six kinds of trace elements such as fertility index to explore the second soil survey since the main soil nutrient indicators trends. The results showed that most of the farmland soil in Yuhang District was weakly acidic and acidic; the amount of cation exchange was mainly medium level; the content of organic matter was medium; the content of total nitrogen was high and medium; the available phosphorus and available potassium The content of available sulfur was mainly in medium level and positively correlated with the content of soil organic matter. The content of available calcium and available magnesium was mainly at medium and high levels, and positively correlated with p H, while the available silicon in soil was high. , Copper, zinc content is rich, but effective boron, molybdenum is low. In the past 26 years, the main nutrients of soil organic matter, total nitrogen, available phosphorus, available potassium and other nutrients in farmland in Yuhang district increased with the increase of To the maximum available potassium.