有机覆盖物对城市园林植物土壤养分状况的影响

通过室内盆栽试验,研究了木屑、松针、核鳞、树皮和枯叶5种有机地表覆盖物对城市园林植物土壤养分状况的影响。结果表明,在裸地、马尼拉草地及灌木茶梅地覆盖不同的有机物地表覆盖物均能降低土壤的pH值,且不同的有机覆盖物对土壤pH值的影响不一样;裸地、马尼拉草地及灌木茶梅地表覆盖有机物处理后土壤有机质、速效磷、速效钾含量明显增加;速效氮含量变化则各有差异,马尼拉草地覆盖有机物则能明显增加土壤硝态氮含量,灌木茶梅地覆盖有机物能明显提高铵态氮含量;不同的有机覆盖物对土壤有机质、速效氮、速效磷、速效钾的含量影响不一样。

Effect of Organic Mulch on Soil Nutrient Status in Urban Landscape Plants

The effects of sawdust, pine needles, nuclear squamous, barks, and litter covering on soil nutrient status in urban landscape plants were investigated through the indoor pot experiment. The results showed that all of the five kinds of organic mulch decreased soil pH value and increased the contents of soil organic, available phosphorus and available potassium with different degrees in bare land, Manila grassland and Camellia sasanqua shrub land. The contents of soil nitrate nitrogen and ammonium nitrogen significantly increased in Manila grassland and Camellia sasanqua shrub land covered with organic mulch,respectively.