Based on the assay of the total content and available content of the trace nutrient elements and the soil pH and organic matter of the soil samples,the characteristic of the available content of the trace nutrient ele...Based on the assay of the total content and available content of the trace nutrient elements and the soil pH and organic matter of the soil samples,the characteristic of the available content of the trace nutrient elements and their affecting factors are studied. The results show that the available B in western Jilin is in a middle level,the content in Nong'an is higher than that in the others; the available Mn is extremely abundant; the available Cu in Nong'an is obviously higher than other areas,and the content in Da'an differs greatly; the available Zn is in a middle level; the severe shortage of available Mo differs between different areas; and the available Fe is extremely abundant. The available Mn,Cu and Fe have significantly positive correlation with their total content; the available B has significantly positive correlation with pH,and Zn has obviously negative correlation with pH; the available Mn and Fe had significantly positive correlation with soil organic matter.展开更多
山东省是中国蔬菜的主要产区，常年蔬菜种植面积占全国的10％以上，设施蔬菜的面积占全国的近50％。1994-1997年山东设施蔬菜年平均施肥量达到N1351 kg hm^-2、P2O51701kg hm^-2和K20539．6kg hm^-2，在这段时间内施肥量逐年增加，2004...山东省是中国蔬菜的主要产区，常年蔬菜种植面积占全国的10％以上，设施蔬菜的面积占全国的近50％。1994-1997年山东设施蔬菜年平均施肥量达到N1351 kg hm^-2、P2O51701kg hm^-2和K20539．6kg hm^-2，在这段时间内施肥量逐年增加，2004年的施肥量与1997年相比氮肥和磷肥的用量有所减少，钾肥的用量有所增加，有机养分占总养分的比例明显增加。设施蔬菜土壤养分表观平衡为氮磷钾均盈余，且盈余量较大。设施蔬菜在大量施肥的情况下，肥料的利用率较低，1997年寿光设施蔬菜氮肥的表观利用率为21．33％，磷肥的表观利用率只有2．82％，钾肥的利用率较高达到61．34％。大棚蔬菜土壤pH值与露地相比有降低的趋势，土壤有机质含量高于露地土壤。山东省不同地区大棚土壤中碱解氮含量差异较大，以地处鲁西的德州最低，寿光的最高，平均达到205．4mgkg^-1。不同地区大棚土壤中有效磷含量差异很大，寿光设施蔬菜土壤中有效磷含量最高，平均为225．2mgkg^-1，土壤有效磷具有明显的积累效应，设施种植时间与土壤有效磷含量之间存在极显著的正相关性（r=0．550＊＊，n=35）。土壤母质类型对土壤速效钾具有一定的影响，寿光设施蔬菜土壤中速效钾含量最高，平均为369．7mgkg^-1。土壤速效钾也具有明显的积累效应，设施种植时间与土壤速效钾含量之间具有极显著的正相关性（r=0．502＊＊，n=35）。设施表层土壤中水溶性钙的含量平均为337．9mgkg^-1，土壤水溶性镁的含量平均为67．8mgkg^-1，明显高于露地土壤。设施蔬菜土壤中微量元素含量均高于露地土壤。展开更多
基金Supported by a Sub-project "Ecological Geochemical Survey of Oil Crop (sunflower) Producing Area in Western Jilin" of the Project of China Geological Survey and Jilin Provincial Government " Agricul-tural Geological Survey of Jilin Province"~~
文摘Based on the assay of the total content and available content of the trace nutrient elements and the soil pH and organic matter of the soil samples,the characteristic of the available content of the trace nutrient elements and their affecting factors are studied. The results show that the available B in western Jilin is in a middle level,the content in Nong'an is higher than that in the others; the available Mn is extremely abundant; the available Cu in Nong'an is obviously higher than other areas,and the content in Da'an differs greatly; the available Zn is in a middle level; the severe shortage of available Mo differs between different areas; and the available Fe is extremely abundant. The available Mn,Cu and Fe have significantly positive correlation with their total content; the available B has significantly positive correlation with pH,and Zn has obviously negative correlation with pH; the available Mn and Fe had significantly positive correlation with soil organic matter.
文摘山东省是中国蔬菜的主要产区，常年蔬菜种植面积占全国的10％以上，设施蔬菜的面积占全国的近50％。1994-1997年山东设施蔬菜年平均施肥量达到N1351 kg hm^-2、P2O51701kg hm^-2和K20539．6kg hm^-2，在这段时间内施肥量逐年增加，2004年的施肥量与1997年相比氮肥和磷肥的用量有所减少，钾肥的用量有所增加，有机养分占总养分的比例明显增加。设施蔬菜土壤养分表观平衡为氮磷钾均盈余，且盈余量较大。设施蔬菜在大量施肥的情况下，肥料的利用率较低，1997年寿光设施蔬菜氮肥的表观利用率为21．33％，磷肥的表观利用率只有2．82％，钾肥的利用率较高达到61．34％。大棚蔬菜土壤pH值与露地相比有降低的趋势，土壤有机质含量高于露地土壤。山东省不同地区大棚土壤中碱解氮含量差异较大，以地处鲁西的德州最低，寿光的最高，平均达到205．4mgkg^-1。不同地区大棚土壤中有效磷含量差异很大，寿光设施蔬菜土壤中有效磷含量最高，平均为225．2mgkg^-1，土壤有效磷具有明显的积累效应，设施种植时间与土壤有效磷含量之间存在极显著的正相关性（r=0．550＊＊，n=35）。土壤母质类型对土壤速效钾具有一定的影响，寿光设施蔬菜土壤中速效钾含量最高，平均为369．7mgkg^-1。土壤速效钾也具有明显的积累效应，设施种植时间与土壤速效钾含量之间具有极显著的正相关性（r=0．502＊＊，n=35）。设施表层土壤中水溶性钙的含量平均为337．9mgkg^-1，土壤水溶性镁的含量平均为67．8mgkg^-1，明显高于露地土壤。设施蔬菜土壤中微量元素含量均高于露地土壤。
