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对阿拉善荒漠草地广泛分布的几种灌木、半灌木土壤有效态常量和微量营养元素的“肥岛”效应进行了研究。结果表明:①霸王、白刺、红砂和沙冬青提高了灌丛根部土壤速效Na、K、Fe和Mn的含量,而降低了灌从根部土壤速效Ca、Mg的含量;驼绒藜除对土壤速效Mg含量有显著影响外,对其他元素无显著的影响。②霸王、白刺和沙冬青对速效Na、K、Fe和Mn有明显的富集作用,对速效Ca负富集作用;红砂对速效Na有极强的富集作用,EA、EB分别为37.59和52.93;除红砂和驼绒藜对速效Mg有富集作用外,其余灌丛对速效Mg无富集作用。③灌丛周围土壤pH值与速效K、Fe和Zn含量呈显著负相关,与Ca呈正相关,与速效Na无相关性。霸王、白刺、沙冬青周围土壤速效Mg含量与pH值也呈显著正相关;除了霸王外,其他灌木周围土壤速效Mn含量都与pH值呈负相关。
The effects of “Feishou” effect of several shrubs, semi-shrub soil effective constants and micronutrients widely distributed in Alashan desert grassland were studied. The results showed that: (1) King, Nitraria, Reaumuria soongorica and Astragalus adsurgens increased the contents of available Na, K, Fe and Mn in the roots of shrubs, and decreased the content of available Ca and Mg in roots. Mg content has a significant impact, the other elements of no significant impact. (2) The over-enrichment effect of Na, K, Fe and Mn on the effective Na, K, Fe and Mn, and the enrichment effect of Ca on the available Ca. The red sand had a very strong enrichment effect on Na, EA and EB were 37.59 And 52.93, respectively. Except for the enrichment of available Mg by red sand and Ceratoides, the other shrubs had no effect on available Mg. ③ There was a significant negative correlation between soil pH values and available K, Fe and Zn contents in the soil around shrubs, positive correlation with Ca and no correlation with available Na. The content of available Mg in soil around Bawang, Nitraria and Salvia miltiorrhiza had a significant positive correlation with pH value. In addition to Overlord, the available Mn content in soil around the shrubs was negatively correlated with pH value.