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对辽宁省北部、中部及南部棕壤型菜园土１５ 对肥、瘦地Ｎ 素保持与供应性能的研究表明，绝大多数肥地及其各粒级微团聚体的全Ｎ 量、ＮＨ＋４ 吸附与解吸量均大于瘦地及其各相应粒级微团聚体的，而ＮＨ＋４ 解吸率则相反．除了大粒级微团聚体外，肥、瘦地及其小粒级微团聚体全Ｎ 储量与ＮＨ＋４ 吸附与解吸性能均有显著差异．肥、瘦地微团聚体的ＮＨ＋４ 吸附与解吸量均随粒径的增大而降低，解吸率则随之升高．ＮＨ＋４ 吸附与营养物质或酶活性等大多没有显著的线性相关关系；肥地及各粒级微团聚体ＮＨ＋４ 解吸与土壤有机质及其结合形态、全Ｎ 含量、脲酶与磷酸酶活性等呈显著线性正相关，瘦地及其各相应粒级微团聚体的与营养物质含量和酶活性均无显著线性相关关系．
The study on the conservation and supply of 15 prime and lean N-rich soils in the northern, central, and southern Liaoning province showed that the N content, NH + 4 adsorption, Desorption volume was greater than the lean and its corresponding size fractions of microaggregates, and NH + 4 desorption rate is the opposite. In addition to the large particle size microaggregates, the total N reserves and the adsorption and desorption capacities of NH + 4 were significantly different among the fertile, lean and microaggregates. The adsorption and desorption amounts of NH + 4 in the lean and lean micro-aggregates decreased with the increase of particle size, and the desorption rate increased accordingly. There were no significant linear correlations between NH + 4 adsorption and nutrients or enzyme activities. NH + 4 desorption of soil micro-aggregates and soil fractions showed significant linear positive correlations with soil organic matter and its bound form, total N content, urease and phosphatase activities Correlated, lean and their respective size fractions of microaggregates had no significant linear correlation with nutrient content and enzyme activity.