土壤保肥-供肥机理及其调节Ⅲ.棕壤型菜园土的N素保持与供应

应用生态学报 ›› 1999, Vol. 10 ›› Issue (6): 676-678.

土壤保肥-供肥机理及其调节Ⅲ.棕壤型菜园土的N素保持与供应

陈利军, 周礼恺, 张岫岚

中国科学院沈阳应用生态研究所, 沈阳110015

收稿日期:1999-04-12 修回日期:1999-08-25 出版日期:1999-11-25 发布日期:1999-11-25
通讯作者: 陈利军,男,1968年生,理学博士,助研.主要从事土壤酶学、土壤肥力学与土壤植物营养学研究,在国内外学术刊物上发表论文17篇.E-mail:ljchen@iae.syb.ac.cn E-mail:ljchen@iae.syb.ac.cn
基金资助:
国家自然科学基金(49571044).

Mechanism of nutrient preservation and supply by soil and its regulation Ⅲ N preservation and supply by brown earth type vegetable garden soil

Chen Lijun, Zhou Likai, Zhang Xiulan

Institute of Applied Ecology, Academia Sinica, Shenyang 110015

Received:1999-04-12 Revised:1999-08-25 Online:1999-11-25 Published:1999-11-25

摘要/Abstract

摘要： 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、NH₄⁺吸附与解吸量均大于瘦地及其各相应粒级微团聚体的,而NH₄⁺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NH₄⁺吸附与解吸性能均有显着差异。肥、瘦地微团聚体的NH₄⁺吸附与解吸量均随粒径的增大而降低,解吸率则随之升高。NH₄⁺吸附与营养物质或酶活性等大多没有显着的线性相关关系;肥地及各粒级微团聚体NH₄⁺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着线性正相关,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着线性相关关系。

关键词: N素保持与供应, 棕壤型菜园土, 土壤微团聚体, 土壤肥力

Abstract: Determination of N preservation and supply performances of 15 pairs of fertile and infertile brown earth type vegetable garden soils sampled from northern, central and southern Liaoning province show that in most soil samples tested, fertile soils and their various particle sizes of microaggregates had a larger amount of total N and adsorbed and desorbed NH₄⁺, but a smaller desorption rate than infertile soils and their corresponding particle sizes of microaggregates. There are significant different between total N, adsorbed and desorbed NH₄⁺ of fertile and infertile soils and their microaggragate of <10μm. The amount of adsorbed and desorbed N decreased with the increment of microaggregates particle sizes in both fertile and infertile soils, but the desorption rate was reversed. NH₄⁺ adsorption had no significant linear relationship with soil nutrients and enzyme activities,but NH₄⁺ desorption of fertile soils and their various particle sizes of microaggregates had significant linear positive relationships with soil organic matter and its binding status, total Ncontent, urease and phosphatase activities, NH₄⁺ desorption of infertile soils and their corresponding particle sizes of microaggregates had no significant linear positive relationships with all nutrients contents and enzyme activities.

Key words: N-preservation and supply, Brown earth type vegetable garden soil, Soil microaggregates, Soil fertility

陈利军, 周礼恺, 张岫岚. 土壤保肥-供肥机理及其调节Ⅲ.棕壤型菜园土的N素保持与供应[J]. 应用生态学报, 1999, 10(6): 676-678.

Chen Lijun, Zhou Likai, Zhang Xiulan . Mechanism of nutrient preservation and supply by soil and its regulation Ⅲ N preservation and supply by brown earth type vegetable garden soil[J]. Chinese Journal of Applied Ecology, 1999, 10(6): 676-678.

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