施用蚓粪对温室菜田土壤 DTPA 浸提态铁锰铜锌含量的影响

为资源化利用蚓粪,采用保护地田间试验的方法,设置单施猪粪(PM)、单施蚓粪(EM)、单施化肥(CF)、不施肥(CK)4个处理,研究蚓粪(EM)对土壤微量元素Fe、Mn、Cu、Zn有效性的影响.结果表明:蚓粪(EM)处理明显降低土壤有效锰含量,猪粪(PM)处理明显降低土壤有效铁含量,化肥能降低土壤pH值及提高土壤有效态Fe、Mn、Cu、Zn的含量.茄子盛果期,土壤有效锰、锌含量与土壤pH呈极显著负相关,有效铁、铜与pH负相关性不明显;土壤有效锌含量与有机质呈极显著正相关,其余微量元素的有效含量与有机质相关性不明显.土壤pH是影响土壤锰、锌有效性的主要因素.

Effect of earthworm manure treatment on DTPA extractable soil Fe,Mn, Cu and Zn.in vegetable field at greenhouse

In order to achieve the efficient use of earthworm manure , by protected field trials, the impacts of different fertilization treatments including pig manure , earthworm manure , chemical fertilizers and no fertilizer on the effectiveness of soil trace elements like Fe, Mn, Cu and Zn were studied. The results showed that EM treatment reduced Mn content in soil significantly. PM treatment reduced available iron content in soil significantly. CF treatment reduced soil pH, but enhanced content of available iron, available Mn, available Cu and available Zn. The contents of soil available Mn and available Zn were negatively correlated with soil pH, but negative correlation between soil pH and the contents of available Fe and available Cu was not significant. The content of soil available Zn were positively correlated to soil organic matter, but no significant correlation existed between organic matter and other trace elements. It concluded that soil pH was the dominant factor affecting the availability of soil Mn and Zn.