氮肥对两种沙性栽培基质中有机碳类物质含量的影响

草业学报 ›› 2013, Vol. 22 ›› Issue (2): 38-46.

氮肥对两种沙性栽培基质中有机碳类物质含量的影响

朱毅^1,2,侯新村¹,武菊英^1*,段留生²,范希峰¹

1.北京市农林科学院北京草业与环境研究发展中心,北京 100097;
2.中国农业大学农学与生物技术学院农业部农作制度重点开放实验室,北京 100193

收稿日期:2012-04-25 出版日期:2013-02-25 发布日期:2013-04-20
通讯作者: E-mail:wujuying1@263.net
作者简介:朱毅(1984-),男,河南周口人,在读博士。E-mail:zydahaoren110@163.com
基金资助:
北京市农林科学院科技创新能力建设专项(KJCX201102005, KJCX201101003, KJCX201103001)和北京市农林科学院青年科研基金(QNJJ201019)资助。

The effects of nitrogen fertilizer on the contents of TOC, POC, SMBC and WSOC in two kinds of sandy substrates

ZHU Yi^1,2, HOU Xin-cun¹, WU Ju-ying¹, DUAN Liu-sheng², FAN Xi-Feng¹

1.Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;
2.Key Laboratory of Farming System, Ministry of Agriculture, China, College Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China

Received:2012-04-25 Online:2013-02-25 Published:2013-04-20

摘要/Abstract

摘要： 为研究粗砂土与河沙2种栽培基质中连续施用氮肥对总有机碳(TOC)、颗粒态有机碳(POC)、微生物量碳(SMBC)和水溶性有机碳(WSOC)含量的影响,本研究采用PVC管栽培柳枝稷开展相关的试验研究。结果表明,连续施用不同浓度的氮肥(CK:0.0 mg/kg、N₁:30.0 mg/kg、N₂:90.0 mg/kg、N₃:150.0 mg/kg,N₄:180.0 mg/kg)对不同土层中的柳枝稷根系生物量、TOC、POC、SMBC和WSOC均有显著性影响(P<0.05)。对于2种沙性栽培基质,不同土层中,TOC、POC、SMBC的最大值均出现在N₄梯度下,WSOC含量则随着氮肥浓度的升高而降低,各施氮水平下,2种基质中根系生物量和有机碳的垂直分布趋势一致,各指标最大值均出现在0~60 cm土层。

Abstract: The effects of continuous nitrogen fertilizer application on the contents of TOC (total organic carbon), POC (particulate organic carbon), SMBC (soil microbial biomass carbon) and WSOC (water-soluble organic carbon) under two types of marginal lands (gross sandy soil and pure sand) were studied using switchgrass planted in PVC pipes. Nitrogen fertilizer exerted significant effects on root dry weight, contents of TOC, POC, SMBC and WSOC at different soil depths of both gross sandy soil and pure sand (P<0.05). In both soil depths of the two types of substrates, the contents of TOC, POC and SMBC all reached a maximum under the N₄ gradient, while the WSOC content decreased. For all nitrogen concentrations there was no significant difference in the vertical distribution of root dry weight, contents of TOC, POC, SMBC and WSOC under both types of substrate. The maximum of all indexes appeared at the 0-60 cm depth.

中图分类号:

S143

朱毅,侯新村,武菊英,段留生,范希峰. 氮肥对两种沙性栽培基质中有机碳类物质含量的影响[J]. 草业学报, 2013, 22(2): 38-46.

ZHU Yi, HOU Xin-cun, WU Ju-ying, DUAN Liu-sheng, FAN Xi-Feng. The effects of nitrogen fertilizer on the contents of TOC, POC, SMBC and WSOC in two kinds of sandy substrates[J]. Acta Prataculturae Sinica, 2013, 22(2): 38-46.

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