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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
From 1987 to 1991, the soils of brown soil were determined for each treatment site. The results showed that there were significant differences in available Zn content between different fertilization treatments. The effective Zn content of soil under CK and N2 treatments decreased below 1μgg-1 and above 1.22μgg-1 under organic manure treatment. Mulching was beneficial to activated soil Effective zinc. There was a significant linear positive correlation between soil available Zn and soil organic matter (r = 0.87), but a very significant linear negative correlation with soil pH (r = -10 *). In the absence of chemical zinc fertilizer, the application of organic fertilizer can fertilize the soil fertility, but also make the soil effective zinc to maintain the corresponding level. ). Theapplicationoforganicmaterialsnotonlyimprovedsoilfertilitybutalsomaintainedtheavialablezincatasuitablelevelthoughchemicalzincwasnotadded. Keywords: soilavialablezinc; fertilizationtreatment; plasticfilmmulching; fixedpositionexperiment