【摘要】：對甘肅省11個地區(qū)的75個對比試驗點實施土壤有機質(zhì)提升技術(shù)模式前后的土壤有機質(zhì)進行差異顯著性假設(shè)測驗及土壤樣本頻數(shù)分布變化特點分析,研究表明:秸稈及綠肥還田后與還田前比較,土壤有機質(zhì)平均增加0.569 g·kg-1,增加4.43%,11個地區(qū)土壤有機質(zhì)含量在秸稈或綠肥還田后與還田前的差異顯著性假設(shè)測驗中,10個地區(qū)達到顯著水平。全省各試驗點秸稈與綠肥還田的作物產(chǎn)量較對照增產(chǎn)率在-1.74%~15.4%之間,平均為5.2%。有機質(zhì)與全氮,有效磷、CEC和全磷有穩(wěn)定的正相關(guān)關(guān)系,伴隨著有機質(zhì)的提高,土壤有效磷、全磷和CEC有同步提高的趨勢。全省各點秸稈及綠肥還田后與還田前土壤有機質(zhì)及對照的土壤有機質(zhì)含量頻數(shù)分布呈偏態(tài)的正態(tài)分布,其峰偏向較大數(shù)值,說明有機質(zhì)提升措施實施后,秸稈及綠肥還田的土壤有機質(zhì)增加的樣點較對照田多且集中度高。結(jié)果表明,秸稈及綠肥還田等措施增加土壤有機質(zhì)及耕層養(yǎng)分含量,提高土壤肥力的效果明顯。
[Abstract]:The differences of soil organic matter in 75 contrast test sites in 11 regions of Gansu Province before and after the implementation of the soil organic matter lifting technique model were tested by using significant hypothesis test and the characteristics of frequency distribution of soil samples were analyzed. The results showed that straw and green manure were compared with those before returning to the field. The yield of straw and green manure returning to the field in the whole province was between -1.74% and 15.4%, with an average of 5.2%. The soil organic matter increased in the field of straw and green manure, and the concentration of soil organic matter was higher than that of the control field. The results showed that straw and green manure could increase the content of soil organic matter and soil nutrients and improve soil fertility.
【作者單位】： 甘肅省耕地質(zhì)量建設(shè)管理總站;甘肅省榆中縣農(nóng)業(yè)技術(shù)推廣中心;
【基金】：基金項目 甘財農(nóng)〔2010〕208號
【分類號】：S158

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