国内外泥炭农用特性比较研究

Comparisonsofphysical and chemical characteristics of peats for agricultural utilization produced by domestic and foreign manufacturers.

比较研究国内外商品泥炭农用物理化学特性结果表明 ,与国外泥炭相比 ,国产泥炭总孔隙度小 ,容重、灰分含量、pH值和电导率均高 ,阳离子代换量低 ;国产泥炭全量养分含量较高 ,全N、全P、全K分别约为进口泥炭的2倍、3～ 4倍和 3～ 5倍。国产泥炭与进口泥炭相比微量元素全Fe和全Mn含量差异最大 ;除速效铁外国产泥炭其他速效养分与进口泥炭相比差异较小 ,而调试好 pH值的进口泥炭速效钙含量较高。

Physical and chem ical characteristics of domestic and for eign peats for agricultural utilization were compared.The results show that comp ared with the peat produced by foreign m anufacturers,the domestic peat has a lower total porosity,and higher bulk density and ash content.The domestic peat h as les s cation exchange capacity than the fore ign peat.Both pH and electric conductivi ty of the domestic peat are relatively h igher.The N,P,and K contents of the dome stic peat are 2,3～4 and 3～5 times higher than those of the foreign peat,while th e domestic peat has similar available nu trients with foreign peat,except availab le iron.Foreign peat of which the pH is adjusted has much more available Ca than domestic peat does.