覆盖作物翻压对华北平原春玉米产量和土壤养分的影响
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作者单位:

(1.中国农业科学院农业资源与农业区划研究所 /农业农村部面源污染控制重点实验室,北京 100081;2.乌兰察布市农业技术推广站,内蒙古 乌兰察布 012000;3.石家庄铁道大学材料科学与工程学院,河北 石家庄 050043;4.西北农林科技大学资源环境学院,陕西 杨凌 712100)

作者简介:

魏静(1992-),女,内蒙古阿左旗人,硕士,主要从事农田面源污染与防治研究。E-mail:weijing0330@163.com。

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基金项目:

基金项目:北京市科技计划课题(D161100005516002);中央级公益性科研院所基本科研业务费专项(No.1610132019037)。


Effects of the incorporation of winter cover crop on succeeding spring maize yield and soil nutrient in the north China plain
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Affiliation:

(1.Institute of AgriculturalResources and RegionalPlanning,Chinese Academy of AgriculturalSciences,Key Laboratory of Nonpoint Source PollutionControl,Ministry of Agriculture and Rural Affairs,Beijing100081;2.Agricultural Technology Extension Station ofUlanqab,Ulanqab,Inner Mongolia012000;3.School of Materials Science andEngineering,Shijiazhuang TiedaoUniversity,Shijiazhuang Hebei050043;4.College of Natural Resources andEnvironment,Northwest A& FUniversity,Yangling Shaanxi712100)

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    摘要:

    冬季覆盖作物 -春玉米种植模式是减缓华北平原冬小麦减少导致的耕地裸露及其环境影响的新型农业生产方式,但其翻压后对华北平原下一季春玉米生长季作物产量和土壤养分及微生物学性质的影响研究鲜见。本研究以华北平原冬闲田 -玉米(WFM)为对照,设置毛叶苕子 -玉米(VrM)、二月兰 -玉米(OvM)以及冬油菜 -玉米(BcM)3个覆盖作物处理,通过盆栽试验研究了冬季种植覆盖作物翻压对玉米生长季土壤理化性质、微生物量和玉米生长特性的影响。结果表明:(1)翻压覆盖作物显著提高了玉米产量以及作物养分吸收量。与WFM处理相比,OvM处理秸秆产量和籽粒产量提高幅度最大,分别为 33.3%和 35.5%( P<0.05);BcM处理地上部氮、磷、钾和地下部磷素吸收量显著提高( P<0.05),分别为30.7%、74.7%、57.6%和171.4%。(2)翻压覆盖作物能显著提高 0~10和 10~20 cm土层有机质、碱解氮、有效磷、速效钾、全氮和全钾含量( P<0.05)。此外,翻压覆盖作物能显著降低玉米幼苗期土壤 NH 4 -N和 NO 3 -N含量( P<0.05),范围为 0.50~3.52和 21.40~33.13 mg·kg-1。(3)在玉米的不同生育期,覆盖作物翻压处理的 SMBC、SMBN和 SMBP均显著高于冬闲处理(P<0.05)。综合翻压覆盖作物对华北平原玉米产量及土壤理化性质和微生物量含量的影响,华北平原冬油菜 -玉米和二月兰 -玉米轮作模式效果较好。

    Abstract:

    The winter cover crop-spring maize rotation system is a new agricultural mode in decreasing the area of barefarmland and its environmental impact due to the decrease of winter wheat in the north China Plain.However,the effectsof incorporation of cover crops on cropyield,soil nutrients and microbial properties in the succeeding spring maize growingseason in the north China Plain are rarely studied.The four treatments,maize -bare farmland(WFM),maize -hairyvetch(VrM),maize -FebruaryOrchid(OvM)and maize -winterrape(BcM)were designed to investigate the effects of incorporation of winter cover crops on the soil physicochemical and microbiological properties and maize growth in the northChinaPlain.The results showed that incorporation of winter cover crops increased maize yield and nutrients uptake byplant.Compared with theWFM,the straw and grain yield were the highest inOvM,increased by 33.3% and 35.5% significantly (P<0.05),and the uptake of nitrogen,phosphorus and potassium by upper parts and phosphorus by underground partsof plant were significantly increased inBcM( P<0.05),by30.7%,74.7%,57.6% and171.4%,respectively.Thesoil organicmatter,alkalinenitrogen,availablephosphorus,availablepotassium,total nitrogen and total potassium content in 0~10 cm and 10~20 cm soil layers were increased significantly under the cover croptreatments( P<0.05).Additionally,soil NH 4+-N and NO3--N contents in young maize period were significantly reduced by 0.50~ 3.52 mg·kg-1and 21.40~ 33.13 mg·kg -1,respectively.The incorporation of cover crops also increased theSMBC,SMBN and SMBPcontents significantly compared with treatment without cover crop at different growth stages ofmaize( P<0.05).The maize -winter rapeseed rotation and maize-February orchid rotation were appropriate models in the north China Plain,takingconsideration of maize yield and soil physicochemical properties and microbialcontent.

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魏静,郭树芳,翟丽梅,刘泰,杨波,孙本华.覆盖作物翻压对华北平原春玉米产量和土壤养分的影响[J].中国土壤与肥料,2020,(1):172-178.

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  • 收稿日期:2019-02-20
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  • 录用日期:2019-04-29
  • 在线发布日期: 2020-03-30
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