利用方式对砂质土壤有机碳、氮和磷的形态及其在不同大小团聚体中分布的影响

doi:10.3864/j.issn.0578-1752.at-2006-8316

中国农业科学 ›› 2007, Vol. 40 ›› Issue (8): 1703-1711 .doi: 10.3864/j.issn.0578-1752.at-2006-8316

利用方式对砂质土壤有机碳、氮和磷的形态及其在不同大小团聚体中分布的影响

章明奎,郑顺安,王丽平

浙江大学环境与资源学院资源科学系

收稿日期:2006-11-02 修回日期:1900-01-01 出版日期:2007-08-10 发布日期:2007-08-10

Chemical Forms and Distributions of Organic Carbon, Nitrogen and Phosphorus in Sandy Soil Aggregate Fractions as Affected by Land Uses

浙江大学环境与资源学院资源科学系

Received:2006-11-02 Revised:1900-01-01 Published:2007-08-10 Online:2007-08-10

摘要/Abstract

摘要： 【目的】为了解林地转化为农地对砂质土壤有机碳、氮和磷的形态及其在不同大小团聚体中分布的影响。【方法】本文采用物理与化学相结合的方法比较研究了自然林地、桔园和蔬菜地等3种利用方式下砂质土壤不同粒径团聚体中有机碳(C)、氮(N)和磷(P)的分布和化学形态。【结果】林地开垦种植柑桔和蔬菜，表土有机碳平均分别减少了79%和67%，全氮平均分别下降了64%和31%，而土壤磷却成倍的增加。农业土壤（桔园和蔬菜地土壤）的C/N比（11～19）低于林地土壤（25～37）。土壤颗粒态有机质对土地利用变化极为敏感，在林地开垦为桔园和蔬菜地后，颗粒态有机质形式的碳（POM-C）的下降幅度明显高于非颗粒态有机碳，林地、桔园和蔬菜地土壤POM-C占土壤总有机碳的平均比例分别为69.1%、41.0%和12.5%。林地土壤有机碳和氮素主要分布在> 0.5 mm 和0.25～0.5 mm 的团聚体中；而桔园和蔬菜地土壤的有机碳和氮素主要分布在0.25～0.5 mm 和0.053～0.125 mm团聚体中。磷素主要分布在＞0.5 mm 和＜0.053 mm等2个粒级中。农业土壤磷素主要以HCl-P形态存在，而林业土壤的磷主要以NaOH-OP (有机磷) 和H2O-P形态存在。【结论】研究证实了由原始林地开垦转变为农业用地不利于砂质土壤有机碳和氮的积累;利用方式改变可极大地影响砂质土壤中有机碳、氮和磷的形态及其在不同大小团聚体中的分布。

关键词: 利用方式, 砂质土壤, 颗粒态有机碳和养分, 团聚体

Abstract: Abstract: 【OBJECTIVE】It is recognized that cultivation strongly affects important ecosystem processes such as biomass accumulation, and thus changes cycles of C and nutrients in soils. However, changes of organic C, N and P distributions in different size fractions of the sandy soils after deforestation is insufficiently understood. 【METHOD】In this study, chemical forms and distribution of organic C, N, and P in different size of aggregates in a sandy Spodosols with three land uses in Florida were assessed. The three land uses were: (1) undisturbed natural forest, (2) 15-25 year citrus groves, and (3) 15-25 year vegetable farms. 【RESULTS】The organic C concentration in surface soils (0-15 cm) was significantly higher under natural forest (24.8 g kg-1) compared to the citrus groves (8.1 g kg-1) and vegetable farms (5.1 g kg-1). After deforestation, vegetable farms and citrus groves depleted soil organic C pool by 79% and 67%, and soil N by 64% and 31%. Soil C:N rations were lower in the agricultural soils (11-19) than that in the forest soils (25-37). The decrease of the particulate organic C (POM-C) was more significant than that of other organic C (non-particulate organic C). The proportions of POM-C in the total C were 69.1%, 41.0%, and 12.5%, respectively, for forest, citrus and vegetable soils. For forest soils, organic C and total N were mainly distributed in the > 0.5 mm and 0.25-0.5 mm aggregate fractions. For vegetable and citrus soils, organic C and total N were mainly distributed in the 0.25-0.5 mm and 0.053-0.125 mm aggregate fractions. Among the five aggregate fractions, total P was the highest in the >0.5 mm and <0.053 mm aggregate fractions. Phosphorus accumulated mainly as HCl-P in the agricultural soils, whereas NaOH-OP (organic P) and H2O-P was major P forms in the forest soils. 【CONCLUSION】The study indicated that the transformation of forest land to cultivated land could weaken the accumulation of C and N in sandy soils. The deforestation could affect greatly the forms of organic C, N and P, and their distribution in aggregate fractions of sandy soils.

章明奎,郑顺安,王丽平. 利用方式对砂质土壤有机碳、氮和磷的形态及其在不同大小团聚体中分布的影响[J]. 中国农业科学, 2007, 40(8): 1703-1711 .

. Chemical Forms and Distributions of Organic Carbon, Nitrogen and Phosphorus in Sandy Soil Aggregate Fractions as Affected by Land Uses[J]. Scientia Agricultura Sinica, 2007, 40(8): 1703-1711 .

[1]	许杨浩峻, 陈丽明, 杨世奇, 唐奕凡, 谭雪明, 曾勇军, 潘晓华, 曾研华. 长期秸秆还田对双季稻田不同土层有机碳、养分和团聚体的影响[J]. 中国农业科学, 2026, 59(7): 1492-1506.
[2]	李星宇, 黄容, 鲜一鸣, 田娇娇, 马晓瑾, 杨乔茜, 李冰, 王昌全. 稻田土壤不同粒级团聚体有机碳组分及CO₂排放对长期施肥的响应[J]. 中国农业科学, 2026, 59(6): 1255-1271.
[3]	刘梦阳, 刘洁, 陈翔, 王擎运, 罗来超, 齐永波, 田达, 李金才, 柴如山. 长期秸秆还田对砂姜黑土团聚体结构及磷组分分布的影响[J]. 中国农业科学, 2026, 59(3): 575-588.
[4]	吴欣珈, 薛玮, 严翊丹, 聂莹莹, 叶立明, 徐丽君. 呼伦贝尔土壤有机碳时空变异特征及其影响因素[J]. 中国农业科学, 2025, 58(6): 1145-1158.
[5]	黄少辉, 杨慧敏, 杨军芳, 杨文方, 聂浩亮, 张静, 邢素丽, 王敬霞, 杨云马, 贾良良. 磷肥长期施用对石灰性褐土团聚体中磷形态及磷酸酶活性的影响[J]. 中国农业科学, 2025, 58(5): 943-955.
[6]	靳晓莹, 肖柄政, 张天津, 刘忠宽, 冯伟, 杜章留. 冬绿肥提升滨海盐碱土团聚性及植物源与微生物源有机碳固存[J]. 中国农业科学, 2025, 58(20): 4203-4215.
[7]	张斯佳, 杨杰, 赵帅, 李莉威, 王贵彦. 华北平原多样化作物与小麦-玉米轮作对土壤质量的影响[J]. 中国农业科学, 2025, 58(2): 238-251.
[8]	陈武荣, 肖霜霜, 肖峻, 陈丹. 喀斯特峰丛洼地利用方式对土壤有机碳及其活性组分的影响[J]. 中国农业科学, 2025, 58(10): 1969-1981.
[9]	韩潇杰, 任志杰, 李双静, 田培培, 卢素豪, 马耕, 王丽芳, 马冬云, 赵亚南, 王晨阳. 不同施氮量对土壤团聚体碳氮含量及小麦产量的影响[J]. 中国农业科学, 2024, 57(9): 1766-1778.
[10]	李天娇, 张乃于, 申文艳, 宋天昊, 刘红芳, 刘晓燕, 张秀芝, 彭畅, 杨劲峰, 张淑香. 长期施肥对黑土和棕壤团聚体稳定性的影响及驱动因素[J]. 中国农业科学, 2024, 57(19): 3835-3847.
[11]	庞津雯, 王钰皓, 陶宏扬, 卫婷, 高飞, 刘恩科, 贾志宽, 张鹏. 生物炭不同添加量对旱作覆膜农田土壤团聚体特性及有机碳含量的影响[J]. 中国农业科学, 2023, 56(9): 1729-1743.
[12]	王飞, 李清华, 何春梅, 游燕玲, 黄毅斌. 长期施肥对黄泥田土壤团聚体中氮素积累和有机氮组成的影响[J]. 中国农业科学, 2023, 56(9): 1718-1728.
[13]	韩紫璇, 房静静, 武雪萍, 姜宇, 宋霄君, 刘晓彤. 长期秸秆配施化肥下土壤团聚体碳氮分布、微生物量与小麦产量的协同效应[J]. 中国农业科学, 2023, 56(8): 1503-1514.
[14]	马胜兰, 况福虹, 林洪羽, 崔俊芳, 唐家良, 朱波, 蒲全波. 秸秆还田量对川中丘陵冬小麦-夏玉米轮作体系土壤物理特性的影响[J]. 中国农业科学, 2023, 56(7): 1344-1358.
[15]	郭戎博, 李国栋, 潘梦雨, 郑险峰, 王朝辉, 何刚. 秸秆还田与施氮对耕层土壤有机碳储量、组分和团聚体的影响[J]. 中国农业科学, 2023, 56(20): 4035-4048.

利用方式对砂质土壤有机碳、氮和磷的形态及其在不同大小团聚体中分布的影响

Chemical Forms and Distributions of Organic Carbon, Nitrogen and Phosphorus in Sandy Soil Aggregate Fractions as Affected by Land Uses

PDF

赞

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0