期刊论文

Li, Qiao-Yun(1753994368@qq.com)

中文

环境科学

0250-3301

2017

38

4

1606-1612

10.13227/j.hjkx.201608178

41430860:国家自然科学基金 XDB15020401:中国科学院战略性先导科技专项 2013WK4009:湖南省国际与区域合作重点项目

本校为第一机构

适宜的磷素分级方法是研究磷素组分特征与评价其有效性的关键. 以磷素的化学与生物活化特点,采用改进的生物有效性的磷素分级方法,应用其研究不同土地利用方式下旱地土与水田土中磷素组分与有效磷(Olsen-P)的关系,并分析环境因子对磷组分的影响. 磷素分级方法将磷素分为4个组分:①自由扩散或根际截留的磷(CaCl_2-P);②有机酸活化和无机弱结合磷(Citrate-P);③系列酶矿化的有机磷(Enzyme-P);④潜在活化的无机磷库(HCl-P). 结果表明, 旱地土及水田土4种磷素组分含量均表现为: HCl-P>Citrate-P>Enzyme-P>CaCl_2-P,且旱地土各磷组分均显著高于水田土. Olsen-P与各磷素组分均呈显著正相关,表明各磷素...

A suitable fractionation method of phosphorus (P) is a key to effective assessment of soil P componential features. Here a new biologically-based P (BBP) method was used to evaluate the P fractions in the upland and paddy soils across large-scale area in China. The soil P was divided into four components: (1) soluble or rhizosphere-intercepted (CaCl2-P), (2)organic acid activated and inorganic weakly bound (Citrate-P), (3) enzyme mineralization of organic P (Enzyme-P), (4)potential activation of inorganic P (HCl-P). Then, the relationships between biologically-based P fractions and standard Ol...