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建瓯市芝城镇现有果园2万余亩,其中7年以内的山地果园1.4万亩;占果园总面积的70％。前几年因这些幼龄果园的水土保持生物措施未配套,台面,梯壁裸露,从而造成不同程度的水土流失。轻者为细沟状侵蚀,重者则发展到切沟侵蚀。据我市试验站徐垱径流场观测,幼龄果园的年土壤侵蚀模数达3400吨/平方公里,据此推算,该镇山地果园以前每年要流失土壤4万吨,带走土壤养分中的氮肥(以尿素计)130吨,磷肥(以过磷酸钙计)342吨,钾肥(以氯化钾计)4.8吨。
There are more than 20,000 mu of existing orchards in Zhicheng Town, Jianou City, 14,000 mu of mountain orchards within 7 years and 70% of the total area of orchards. A few years ago these young orchards due to biological measures of soil and water conservation are not complete, table, wall exposure, resulting in varying degrees of soil erosion. Light for the erosion of the rill, in severe cases is the development of cutting erosion. According to the test station Xu 垱 runoff field in our city, young orchard annual soil erosion modulus of 3400 tons / km2, which projections, the town of mountain orchard before the annual loss of 40,000 tons of soil, remove soil nutrients 130 tons of nitrogen fertilizer (in terms of urea), 342 tons of phosphate fertilizer (in terms of superphosphate) and 4.8 tons of potassium fertilizer (in terms of potassium chloride).