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

doi:10.3321/j.issn:1000-7091.1998.02.008

Abstract

Abstract: 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.

Key words: No tillage, Mulch, Soil nutrient, Enzyme

CLC Number:

S345

Ji Zengshun, Zhang Shumei， Xue Zongrang， Yan Xuanmei， Fan Lanying， Zhang Zhiqin， Luo Xitu，Wu Jinfang, Zhang Xiangjun. A Study on Soil Nutrient with Notillage in Arid CornfieldⅠ Soil Organic Matter,Enzyme and Nitrogen[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1998, 13(2): 42-47. doi: 10.3321/j.issn:1000-7091.1998.02.008.

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