[1]吴 雯,郑子成*,李廷轩.退耕植茶地土壤团聚体中有机磷组分分布特征[J].山地学报,2017,(04):459-468.[doi:10.16089/j.cnki.1008-2786.000243]
　WU Wen,ZHENG Zicheng,LI Tingxuan.Characteristics of Organic Phosphorus Fractions within Soil Aggregates in Soils Returned from Farmland to Tea[J].Mountain Research,2017,(04):459-468.[doi:10.16089/j.cnki.1008-2786.000243]
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退耕植茶地土壤团聚体中有机磷组分分布特征()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2017年04期
页码:
459-468
栏目:
山地环境
出版日期:
2017-07-30

文章信息/Info

Title:
Characteristics of Organic Phosphorus Fractions within Soil Aggregates in Soils Returned from Farmland to Tea
文章编号:
1008-2786-(2017)4-459-10
作者:
吴 雯; 郑子成*; 李廷轩
四川农业大学资源学院,成都 611130
Author(s):
WU Wen;  ZHENG Zicheng;  LI Tingxuan
College of Resource Science, Sichuan Agricultural University, Chengdu 611130, China
关键词:
退耕植茶;  土壤团聚体;  有机磷组分;  贡献率
Keywords:
returning farmland to tea;  soil aggregates;  organic phosphorus fractions;  contribution rate
分类号:
S153.6
DOI:
10.16089/j.cnki.1008-2786.000243
文献标志码:
A
摘要:
有机磷是土壤磷库的重要组成部分,其活性大小与土壤供磷能力密切相关。采用野外调查与室内分析相结合的方法,以四川雅安市名山区中峰乡退耕植茶地(2-3年、9-10年、16-17年)为研究对象,选取邻近撂荒地为对照,探讨了退耕植茶地土壤团聚体中有机磷组分的分布特征,结果表明:随着退耕植茶年限的延长,<0.25 mm粒径团聚体活性有机磷含量增加; 退耕植茶16-17年各粒径中等稳性有机磷显著低于其它退耕年限,中等活性有机磷含量在退耕植茶9-10年最高,含量在99.20-313.29 mg/kg之间。与撂荒地相比,退耕植茶9-10年后土壤团聚体中等活性有机磷含量显著增加; 而退耕植茶16-17年土壤团聚体中等稳性有机磷含量显著降低。活性有机磷、中等活性有机磷主要分布于小粒径团聚体中; 高稳性有机磷主要分布于>5 mm和5-2 mm 粒径团聚体; 中等稳性有机磷在退耕植茶地中主要分布于5-2 mm、0.5-0.25 mm 和<0.25 mm粒径团聚体,而在撂荒地中分布较为均匀。对各有机磷组分贡献率最大均为>5 mm 粒径团聚体,占33.49%-74.96%。随着退耕植茶年限的延长,>5 mm 粒径团聚体贡献率逐渐增加。不同粒径团聚体对有机磷组分的保持能力具有明显差异,退耕植茶后土壤团聚体中等活性有机磷含量增加,且逐渐呈现活性较低的有机磷形态向活性较高的磷形态转化趋势。
Abstract:
Organic phosphorus is an important part of soil phosphorus pools.The activity of organic phosphorus is closely related to the ability of supplying phosphorus by soil.Field investigation and laboratory analysis were combined to investigate the organic phosphorus fraction characteristics within soil aggregates, which were returned from farmland to tea and located in Zhongfeng Township, Mingshan County, Ya'an, Sichuan Province with different ages(2-3, 9-10 and 16-17 years old), in response to the returning of farmland to tea, with the control of nearby abandoned land.The results showed that the content of labile organic phosphorus within aggregate at the particle size of <0.25 mm increased with the increasing ages.The moderate resistant organic phosphorus within each particle size of soil aggregates with ages of 16-17 years was significantly lower than that in aggregate fractions of other ages.The highest content of moderate labile organic phosphorus was observed in aggregate fractions of 9-10 years, ranging from 99.20 to 313.29 mg/kg.The contents of moderate labile organic phosphorus in aggregate fractions returned from farmland to tea with ages of 9-10 years and 16-17 years were significantly higher than those in the abandoned land.However, the moderate resistant organic phosphorus in aggregate fractions returned from farmland to tea with ages of 16-17 years was significantly lower than that in the abandoned land.For the distribution of organic phosphorus, the labile organic phosphorus was mainly noticed in aggregate at the particle size of <1 mm.The content of moderate labile organic phosphorus in aggregate fractions increased with the decreasing particle sizes.The resistant organic phosphorus mainly existed in >5 mm and 5-2 mm particle size of aggregates.The moderate resistant organic phosphorus mainly existed in 5-2 mm, 0.5-0.25 mm and <0.25 mm particle size in soil aggregate fractions returned from farmland to tea and was well distributed in the abandoned land.The particle size of >5 mm accounted most to the organic phosphorus fractions, ranging from 33.49% to 74.96%.The contribution rates of aggregates at the particle size of >5 mm increased with the increasing ages.These results demonstrated that the distribution of organic phosphorus fractions varied greatly in different particle size of soil aggregates.The content of moderate labile organic phosphorus increased after returning from farmland to tea.With the increasing ages, the organic phosphorus in soil aggregate fractions was transformed to fractions with higher activities.

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备注/Memo

备注/Memo:
收稿日期(Received date):2016-09-08; 改回日期(Accepted date):2017-03-18
基金项目(Foundation item):国家自然科学基金项目(40901138); 四川省科技支撑项目(2013N20044)[National Natural Science Foundation of China(40901138); Sichuan Science and Technology Support Project(2013N20044)].
作者简介(Biography):吴雯(1992-),女,贵州安顺人,硕士研究生,主要研究方向:土壤生态[Wu Wen(1992-),female, born in Anshun,Guizhou Province,M.Sc.candidate,research on soil ecology] E-mail: wuwen0629@163.com
*通讯作者(Corresponding author):郑子成(1976-),男,博士,教授,主要研究方向:土壤生态与水土保持[Zheng Zicheng(1976-),male,Ph.D., professor, research on soil ecology and soil and water conservation] E-mail: zichengzheng@aliyun.com
更新日期/Last Update: 2017-07-30