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2013年,通过对本溪县玉米田550个代表性土壤样品的碱解氮、有效磷、速效钾的测定分析,与2003年全县土壤测定分析数据进行对比,并参照全国土壤养分分级标准,得出如下结论:近10年来,土壤碱解氮全县平均增加35 mg/kg,由中等水平变成丰富水平,与农户大量施用速效氮肥有关。土壤有效磷全县平均增加17.1 mg/kg,现有效磷含量属于丰富水平。与农户一直重视对磷肥的投入有关,如过磷酸钙、磷酸二铵等含磷化肥,使土壤磷素的残留量和供给水平逐年提高。土壤速效钾全县平均降低23 mg/kg,属于缺乏水平。11个乡镇其中7个乡镇土壤速效钾属于很缺乏水平,2个乡镇属于缺乏水平,2个乡镇属于较缺乏水平。土壤速效钾含量急剧下降,这一现象必须引起重视。
In 2013, by comparing and analyzing the data of soil analysis and analysis of the entire county in 2003 with the analysis of the determination of available nitrogen, available phosphorus and available potassium in 550 representative soil samples in the corn field of Benxi County, and with reference to the national soil nutrient classification standard, The conclusion is as follows: In the past 10 years, the total soil alkali-hydrolyzed nitrogen increased by 35 mg / kg on average from middle level to rich level, which was related to the large-scale application of quick-acting nitrogen fertilizer by farmers. Soil available phosphorus increased by an average of 17.1 mg / kg in the county, the available phosphorus content is rich. And farmers have always been concerned about the input of phosphate fertilizer, such as superphosphate, diammonium phosphate and other phosphorus-containing fertilizers, so that the soil phosphorus residues and supply levels increased year by year. Soil available potassium county average reduction of 23 mg / kg, is a lack of level. In 11 townships, 7 of the township townships were in a very deficient level of available potassium. Two townships were in a deficit state and two townships were in a less adequate level. The rapid decline of available potassium in soils must pay attention to this phenomenon.