| 免耕对旱作燕麦田耕层土壤微生物生物量碳、氮、磷的影响 |
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| 引用本文： | 郭晓霞,刘景辉,张星杰,李立军,赵宝平,Surya N. Acharya.免耕对旱作燕麦田耕层土壤微生物生物量碳、氮、磷的影响[J].土壤学报,2012,49(3):575-582. |
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| 作者姓名： | 郭晓霞 刘景辉 张星杰 李立军 赵宝平 Surya N. Acharya |
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| 作者单位： | 1. 内蒙古农业大学燕麦科技创新团队,呼和浩特,010019
2. Lethbridge Research Centre,Agriculture and Agri-Food Canada,Lethbridge,Alberta,T1J4B1,Canada |
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| 基金项目： | 国家“十一五”科技支撑计划重点课题（2006BAD15B05）、挑战计划“黄河流域旱作保护性耕作项目”（CPWFY |
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| 摘 要： | 2005～2008年,在内蒙古清水河县研究了免耕留低茬(NL)、免耕留高茬(NH)、免耕留低茬覆盖(NLS)、免耕留高茬覆盖(NHS)和常规耕作(T)5种耕作方式对旱坡地燕麦田耕层土壤微生物生物量碳、氮、磷的影响。结果表明:各处理土壤微生物生物量碳、氮、磷含量在不同年际间的变化趋势一致。土壤微生物生物量碳、氮含量均呈双峰曲线变化,其中,NHS和NLS处理土壤微生物生物量碳的峰值出现在拔节期和灌浆期,NH、NL和T处理的土壤微生物生物量碳的峰值出现在孕穗期和灌浆期,而土壤微生物生物量氮的峰值则出现在苗期和灌浆期。土壤微生物生物量磷呈单峰曲线变化,各处理的峰值均出现在灌浆期。不同年份间、不同生育期间,土壤微生物生物量碳、氮、磷含量的大小顺序为:NHS>NLS>NH>NL>T。其中,免耕各处理的燕麦产量相对常规耕作呈先降低后增加的趋势,以2008年为例,NHS、NLS、NH、NL燕麦产量分别较T增加了22%、17%、11%、5%。综上所述,免耕有利于提高土壤微生物生物量碳、氮、磷含量,而且可有效地增加作物产量,尤其是NHS和NLS处理比较明显。
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| 关 键 词： | 免耕 燕麦 耕层 土壤微生物生物量碳、氮、磷 产量 |
| 收稿时间： | 1/5/2011 10:25:05 PM |
| 修稿时间： | 8/24/2011 7:39:16 PM |
Effects of non-tillage on soil microbial C, N and P in plough layer of oat field |
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| Guo Xiaoxi,Liu Jinghui,Zhang Xingjie,Li Lijun,Zhao Baoping and Surya N. Acharya.Effects of non-tillage on soil microbial C, N and P in plough layer of oat field[J].Acta Pedologica Sinica,2012,49(3):575-582. |
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| Authors: | Guo Xiaoxi Liu Jinghui Zhang Xingjie Li Lijun Zhao Baoping and Surya N Acharya |
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| Affiliation: | Agronomy college of Inner Mongolia Agricultural University |
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| Abstract: | A field experiment was carried out in 2005~2008 to a study effects of different tillage methods on soil microbial biomass C,N and P in plough layer of an oat field in Qingshuihe County,Inner Mongolia.The experiment was designed to have five treatments,i.e.non-tillage with short stubbles(NL),non-tillage with tall stubbles(NH),non-tillage with short stubbles and mulch(NLS),non-tillage with tall stubbles and mulch(NHS) and conventional tillage(T).Results show no much difference between the treatments in trend in interannual variation of soil microbial biomass C,N and P in amount.Both soil microbial biomass C and N followed a double-peak curve.The peaks appreared at the jointing and filling stages,separately in Treatments NLS and NHS,and at booting and filling stages,separately in Treatments NL,NH and T while the peaks of soil microbial biomass N did at the seedling and filling stages,separately.However,the amount of soil microbial biomass P varied following a single-peak curve,with the peak appearing at the filling stage in all the treatments.Regardless of years or growing stages,the treatments followed a decreasing order of Treatment NHS>Treatment NLS>Treatment NH>Treatment NL>Treatment T in amount of soil microbial biomass C,N and P.All the non-tillage treatments affected yield of the crop,which declined first and then rose as compared with CK or Treatment T.Taking 2008 as an example,yield of the crop increased by 22%,17%,11% and 5%,respectively,in Treatment NHS,Treatment NLS,Treatment NH and Treatment NL.To sum up,non-tillage especially non-tillage with stubbles and mulch,is conducive to improvement of contents of soil microbial biomass C,N and P,and yield of the crop. |
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| Keywords: | Non-tillage Oat plough layer Soil microbial biomass carbon Nitrogen and phosphate Yield |
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