【摘要】 １９８７～１９９１年对棕壤定位试验地各处理土壤进行测定．结果表明：不同施肥处理土壤有效锌含量差异明显，ＣＫ、Ｎ２处理的土壤有效锌降至１μｇｇ－１以下，而施有机肥料处理的则提高到１．２２μｇｇ－１以上；覆膜有利于活化土壤有效锌。土壤有效锌与土壤有机质含量呈极显著线性正相关（ｒ＝０．８７），而与土壤ｐＨ呈极显著线性负相关（ｒ＝－１０＊）。在不施化学锌肥的情况下，施用有机肥料即可培肥土壤肥力，又可使土壤有效锌保持在相应的水平．）．Ｔｈｅａｐｐｌｉｃａｔｉｏｎｏｆｏｒｇａｎｉｃｍａｔｅｒｉａｌｓｎｏｔｏｎｌｙｉｍｐｒｏｖｅｄｓｏｉｌｆｅｒｔｉｌｉｔｙｂｕｔａｌｓｏｍａｉｎｔａｉｎｅｄｔｈｅａｖｉａｌａｂｌｅｚｉｎｃａｔａｓｕｉｔａｂｌｅｌｅｖｅｌｔｈｏｕｇｈｃｈｅｍｉｃａｌｚｉｎｃｗａｓｎｏｔａｄｄｅｄ．Ｋｅｙｗｏｒｄｓ：ｓｏｉｌａｖｉａｌａｂｌｅｚｉｎｃ；ｆｅｒｔｉｌｉｚａｔｉｏｎｔｒｅａｔｍｅｎｔ；ｐｌａｓｔｉｃｆｉｌｍｍｕｌｃｈｉｎｇ；ｆｉｘｅｄｐｏｓｉｔｉｏｎｅｘｐｅｒｉｍｅｎｔ更多还原

【Abstract】 The results obtained from the fixed position experiment on Brown Earth at Shenyang Agricultural University in 1987- 1991 showed that the soil avalable zinc content was greatly different in some fertilization treatments. The content of it in CK and N2 treatments was below 1μgg-1, whereas over 1.22 μgg-1 in the manure-applied treatments. Zinc was easily activated in covered soil. The content of avialable zinc had a significant postive linear relationship with that of soil organic matter (R=0.87), whereas a negative relationship With soil pH (R= -1.0**). The application of organic materials not only improved soil fertility but also maintained the avialable zinc at a suitable level though chemical zinc was not added.更多还原