旱地玉米免耕系统土壤养分研究 Ⅰ土壤有机质、酶及氮变化  

A Study on Soil Nutrient with Notillage in Arid CornfieldⅠ Soil Organic Matter,Enzyme and Nitrogen

作　　者：籍增顺[1] 张树梅[1] 薛宗让 阎玄梅[1] 樊兰瑛[1] 张志琴[1] 洛希图 武金芳 张象俊 

机构地区：[1]山西省农业科学院农业资源综合考察研究所 [2]山西省汾阳县区划办公室

出　　处：《华北农学报》1998年第2期42-47,共6页Acta Agriculturae Boreali-Sinica

基　　金：山西省青年科学基金

摘　　要：１９９４～１９９５年对旱地玉米不同耕作系统土壤有机质、氮和酶进行了研究。结果表明，在６年的试验地上，免耕覆盖比常规耕作０～５ｃｍ土壤有机质平均高０．５５个百分点，土壤ｐＨ值低０．１９，硝态氮玉米田低３０．３５％，休闲田高３０．３７％，铵态氮玉米田０～２０ｃｍ土层低５８．３％，休闲田低５．５７％，水解氮玉米田０～２０ｃｍ，低４．９７％，休闲田差别不大。２０～５０ｃｍ硝态氮、铵态氮和水解氮免耕覆盖与常规耕作之间差异不大。秋耕覆盖和秋耕秸秆还田是调控土壤供氮强度的两条主要措施。A study was conducted under four environmental conditions during 1994 and 1995 in arid corn field to determine the effects of four tillage systems on soil organic matter,nitrogen and enzyme.The experiment was conducted using notillage with whold stalk mulch,mulch with whole stalk after full plow,conventional tillage and plough under the stalk after the harvest.Results indicated that:Compared with coventional tillage,soil organic matter increased by 0.55 percent at 0～5cm depth;pH decreased by 0.16,at 0～20cm depth soil;No3N decreased by 30.35% in cornfield,30.37% highter than that in fallow field;NH4N decreased by 58.3% in cornfield,5.57% lower than that in fallow field;alkalihydro.N was4.97% lower than that in corn field,with no difference in fallow field under notillage system.No3N,NH4N and Alkalihydro.N were not different in level at 20-50cm depth.

关 键 词：玉米 免耕 覆盖 土壤养分 酶 旱地玉米 

分 类 号：S513.061[农业科学—作物学]