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土地整理后喀斯特土壤不同粒级组分中养分含量研究
Study on the Soil Nutrients Contents in Different Particle Fractions of Karst Slope Land after Land Consolidation
为探讨喀斯特山地土地整理后有效的土壤培肥模式,揭示不同粒级组分中养分含量的分布,以贵州省普定县陈家村进行土地整理后的坡地为例,进行小区施肥种植试验,研究不同施肥方式对整理后岩溶土壤养分培肥的影响。结果发现,各培肥模式中,施用农家肥、深松、使用本地蚯蚓对土壤有机质、全氮的改善效果较好,施用农家肥+尿素+过磷酸钙+氯化钾对增加土壤磷、钾养分的效果较好。同时发现0.002~0.02 mm粒级组分中有机质和养分含量普遍高于其他粒级。
Study the effective fertilization modes on the Karst soil nutrients after land consolidation, and the content of nutrients in different soil particle fractions. A slope land at Chenjiazhai village of Puding County, Guizhou Province, was used as plot experiments in which different amounts of fertilizer were used in order to study the influence of fertilization modes on the Karst soil nutrients after land consolidation. The results showed that: (1) the of fertilizing modes such as farmyard manure mode, subsoiling mode, using local earthworms mode made a good effects on the increase of content of soil organic matter, total N. (2) The of fertilizing modes such as farmyard manure, integrated with urea, single superphosphate and potassium chloride were beneficial to increase the contents of soil total P and total K. (3) Soil organic matter and other nutrients in fractions of 0.002-0.02 mm were higher than in other soil particle fractions.
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