吕梁山红枣经济林土壤养分评价与施肥建议

Soil Nutrient Evaluation and Fertilization Suggestion for Economic Forest of Jujube in Lüliang Mountain

为促进吕梁山红枣经济林土壤肥力提升,从临县、柳林县、石楼县、兴县这4个县具有代表性的红枣经济林中采集土样,分析土壤有机质、碱解氮、有效磷、速效钾等基本养分含量,并根据全国第二次土壤普查养分分级标准进行评价。结果表明,吕梁山红枣经济林土壤有机质、碱解氮、有效磷、速效钾均为中等变异;土壤有机质、碱解氮含量主要处于5,6级水平,有效磷含量主要处于4级及以上水平,速效钾含量主要处于3,4级水平。吕梁山红枣经济林土壤有机质和碱解氮含量较低,有效磷含量中等偏下,速效钾含量中等,在今后的施肥过程中应注重有机肥和氮肥的投入,增施适量磷肥和微量钾肥,并实行保护性耕作方式。

To promote the improvement of soil fertility in the economic forest of Lüliang mountain jujube,soil samples were taken from the representative jujube economic forests of Linxian county,Liulin county,Shilou county and Xingxian county of Lüliang mountain.The basic nutrient contents such as organic matter,alkali nitrogen,available phosphorus and available potassium were analyzed and evaluated according to the second national soil census nutrient grading standard.The results showed that the soil organic matter,alkali nitrogen,available phosphorus and available potassium were all moderately variable in the economic forest of Lüliang mountain.The contents of soil organic matter and alkali nitrogen were mainly in the 5th and 6th ranges,the available phosphorus content was mainly in the range of 4th range and above,the available potassium content was mainly in the 3th amd 4th range.The soil organic matter and alkali nitrogen content of Lüliang mountain jujube economic forest are low,the effective phosphorus content is moderate to low,and the available potassium content is moderate.In the future fertilization process,organic fertilizer and nitrogen fertilizer should be paid attention to the input,the application of appropriate amount of phosphate fertilizer,trace potassium fertilizer,and the implementation of conservation tillage.