秸秆覆盖对银杏用材林土壤养分的影响

发布时间：2018-07-23 10:53

【摘要】：【目的】研究秸秆覆盖对银杏用材林土壤全量养分和速效养分的影响,为沿海滩涂的土壤改良提供理论依据。【方法】采用随机区组试验设计,以不覆盖秸秆为对比,分析了不同覆盖材料(小麦秸秆、稻草秸秆和玉米秸秆)以及不同覆盖量(2、4和6 kg/m2玉米秸秆)对林下浅层土壤(0~10 cm)养分的影响。【结果】3种覆盖材料均有提高林下浅层土壤养分含量的作用,其中稻草秸秆和玉米秸秆对土壤的培肥效果相对较好,稻草秸秆对碱解氮、全钾、速效钾含量影响较大,玉米秸秆对全氮、全磷、速效磷含量影响较大。不同覆盖量的玉米秸秆对土壤养分含量的增加效果不同,覆盖量越大,覆盖效果越好。相对于秸秆覆盖对土壤全氮、全磷和全钾的作用,对速效养分含量的增加效果更加明显。【结论】秸秆覆盖能有效提高土壤养分,可用于沿海滩涂银杏用材林土壤的改良。
[Abstract]:[objective] to study the effect of straw mulching on soil total nutrient and available nutrient in Ginkgo biloba timber forest, and to provide theoretical basis for soil improvement in coastal tidal flat. Different mulching materials (wheat straw) were analyzed. The effects of straw and corn straw and different mulching amount (2 ~ 4 and 6 kg/m2 corn straw) on the nutrient content of shallow soil (0 ~ 10 cm) were studied. [results] all three mulching materials could increase the nutrient content of the shallow soil. The effects of straw and corn straw on soil fertility were relatively good. Straw had a great effect on the content of alkali-hydrolyzed nitrogen, total potassium and available potassium, and maize straw had a greater effect on total nitrogen, total phosphorus and available phosphorus. The increasing effect of maize straw with different mulching amount on soil nutrient content was different, and the higher the mulching amount, the better the mulching effect. Compared with the effect of straw mulching on soil total nitrogen, total phosphorus and total potassium, the effect of straw mulching on the increase of available nutrient content is more obvious. [conclusion] Straw mulching can effectively improve soil nutrient, and can be used to improve the soil of Ginkgo biloba timber forest in coastal beach.
【作者单位】：南京林业大学南方现代林业协同创新中心;南京林业大学林学院;
【基金】：国家十二五科技支撑计划项目(2012BAD21B04)
【分类号】：S714.8

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