| 秸秆与地膜覆盖对旱作 土 娄 土碳氮组分的影响 |
| 张彤勋1; 皮小敏1; 孙本华1,2; 柳媛媛1; 魏静1; 高明霞2
|
| 2018
|
发表期刊 | 西 北 农 业 学 报
|
卷号 | 27期号:8页码:1225-1233 |
摘要 | 为探明不同覆盖方式对土壤有机碳氮组分的影响及其机制,为旱作农田覆盖措施的选择提供理论
和实践依据。在陕西关中 土 娄 土地区冬小麦 - 夏玉米轮作体系下进行田间试验,设置秸秆覆盖( SM )、半膜覆
盖( HFM )、全膜覆盖(
FM )和不覆盖( NM ) 4种处理,研究不同覆盖措施对表层土壤有机碳( SOC )、全氮
( TN )、微生物量碳氮( MBC 、 MBN )、可溶性有机碳氮( DOC 、 DON )以及 0~200cm 土壤剖面硝态氮和水分分
布的影响。结果表明,与不覆盖处理相比,秸秆覆盖处理的土壤 SOC 、 MBC 、 MBN 、 DOC 质量分数提高 3.9% 、
67.5% 、 56.2% 和 18.0% ( P <0.05 ),但土壤 DON 质量分数显著下降。全膜覆盖处理显著降低土壤 DOC 、
DON 质量分数及 100~200cm 土层水分储量( P <0.05 ),但对 MBC 、 MBN 、 SOC 以及 TN 无显著影响。半膜
覆盖显著降低 SOC 和 DON 的质量分数,对 TN 、 MBN 和 DOC 影响不显著,但显著提高 MBC 质量分数;半膜
覆盖处理膜间的土壤 MBC 、 MBN 以及 DOC 质量分数均显著高于膜下,而膜间土壤 DON 质量分数及 0~20
cm 、 20~100cm 、 0~200cm 土层硝态氮质量分数与累积量均低于膜下。秸秆覆盖处理与全膜覆盖处理均显
著提高表层土壤( 0~20cm )硝态氮质量分数和累积量,显著降低 20~100cm 和 100~200cm 土层硝态氮累
积量。总体而言,秸秆覆盖提高 SOC 、 MBC 、 MBN 以及土壤表层硝态氮累积量,有利于提高土壤肥力,是西北
土 娄 土区值得推广的覆盖栽培模式;薄膜覆盖降低硝态氮向深层土壤淋溶的风险,但对土壤肥力的长期影响尚不明确。 |
其他摘要 | The purpose of this study is to provide a theoretical and practical basis for mulching
strate -
gy selection , so as to ascertain the effects of different mulchings on soil organic carbon and nitrogen
components and its mechanism.Effects of different straw and plastic film mulching , including straw
mulching ( SM ), half plastic film mulching
( HFM ), full plastic mulching ( FM ), and no mulching
( NM ) under the rotation of winter wheat
- summer maize system , on dryland of Eum - Orthric Anthro -
sols were studied in Guanzhong area of Shaanxi province.The results showed that
, compared with no
mulching , straw mulching increased SOC , MBC , MBN and DOC by
3.9% , 67.5% , 56.2% and
18.0% ( P <0.05 ), respectively , whereas significantly decreased the soil DON mass fraction.Mulching
treatment significantly decreased soil DOC and DON ,
and water storage of soil profile of 100-200cm
(
P <0.05 ), however , it had no significant effect on soil MBC , MBN , SOC and TN.The mass frac -
tion of SOC and DON were significantly decreased by the half plastic film mulching , however
, the
MBC mass fraction did not significantly increase , but the mass fraction of DOC significantly
increased.
The soil MBC , MBN and DOC between plastic films were significantly higher than those under plastic
films in half plastic film mulching treatment , however , soil DON between plastic films and soil ni
-
trate - nitrogen mass fraction and accumulation amount of 0-20cm , 20-100cm and 0-200cm profile
were lower than those under plastic films.The soil NO - 3 - N mass fraction and accumulation of 0-20
cm profile under straw mulching and full plastic film mulching
were improved , however , the soil
NO - 3 - N accumulation of 20-100cm and 100-200cm profile significantly decreased.Overall , straw
mulching could increase the mass fraction of SOC
, MBC , MBN and DOC , and accumulation of NO -
3 -
N of topsoil , which was beneficial to improve the soil fertility , and was a worthy cultivation mode to
be recommended on the Eum - Orthric Anthrosols area of Northwest China.Film mulching can reduce
the leaching risk of NO
-
3 - N , nevertheless , its long - term effects on soil fertility is not clear. |
关键词 | 秸秆覆盖
地膜覆盖
微生物量碳氮
有机碳
硝态氮
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/10305
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学 资源环境学院,农业部西北植物营养与农业环境重点实验室 2.西北农林科技大学 中国旱区节水农业研究院
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推荐引用方式 GB/T 7714 |
张彤勋,皮小敏,孙本华,等. 秸秆与地膜覆盖对旱作 土 娄 土碳氮组分的影响[J]. 西 北 农 业 学 报,2018,27(8):1225-1233.
|
APA |
张彤勋,皮小敏,孙本华,柳媛媛,魏静,&高明霞.(2018).秸秆与地膜覆盖对旱作 土 娄 土碳氮组分的影响.西 北 农 业 学 报,27(8),1225-1233.
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MLA |
张彤勋,et al."秸秆与地膜覆盖对旱作 土 娄 土碳氮组分的影响".西 北 农 业 学 报 27.8(2018):1225-1233.
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文件名:
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秸秆与地膜覆盖对旱作土娄土碳氮组分的影响_张彤勋.pdf
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